{"title":"Krell","description":"Krell Industries, founded in 1980, is one of the premier manufacturers of high-end audio equipment, featuring award winning amplifiers, preamplifiers, CD \u0026amp; DVD players, surround sound processors, digital-to-analog converters, and loudspeakers for music lovers and home theater aficionados.\u003cbr\u003e\u003cbr\u003e\n\n\u003ci\u003e\u003cb\u003e\"It is hands down the best amplifier I've ever heard and the new benchmark for\nwhich all future cost no-object amplifiers will be judged.\"\u003c\/b\u003e\u003c\/i\u003e\u003cbr\u003e\nAndrew Robinson - Home Theater Review\u003cbr\u003e\u003cbr\u003e\n\nFor nearly three decades, Krell has earned a distinguished reputation for engineering innovation and product excellence. The companys history is replete with product introductions that have deeply impacted the high-end audio industry.","products":[{"product_id":"krell-foundation-4k-uhd","title":"Krell Foundation 4K UHD","description":"The Foundation 4K UHD adds HDMI 2.0 and HDCP 2.2 technology to the award winning Foundation processor. Designed to be upgradeable, existing Foundation processors can be upgraded to the Foundation 4K UHD platform at the Krell facility. The Foundation 4K UHD updates 4 of the 10 HDMI 1.4a inputs to HDMI 2.0\/HDCP 2.2 capability. New on screen display functionality adds status messages including volume, active source, video resolution and audio format. System setup is accomplished from the front panel or a network tablet\/computer. \u003cbr\u003e\u003cbr\u003e\n\n \nAdditional functionality has been added to the second HDMI output. The two HDMI video outputs are now independent and can be configured to send different video signals to two individual displays. Both outputs support 4K signals being simultaneously displayed. \u003cbr\u003e\u003cbr\u003e\n \nBoth HMDI outputs feature Audio Return Channel (ARC). With ARC, a display device is able to send audio back down the HDMI cable to the Foundation 4K UHD. Televisions with built-in web streaming capability like Netflix or Pandora, can send the audio signal back to the Foundation 4K UHD use the full home theater system instead of just the TV's speakers. \u003cbr\u003e\u003cbr\u003e\n \nFeaturing the latest digital connectivity, the Foundation 4K UHD maintains Krell's exacting standards for analog audio reproduction. \u003cbr\u003e\u003cbr\u003e\n \nFrom decoding the latest lossless audio formats, extensive digital switching, 3DTV pass-through, and more, the Foundation 4K UHD is fully compliant with the digital age. The 7.1-channel processor also features balanced audio outputs, automatic setup and room EQ, and Krell's legendary robust hardware. A slim form factor exudes the Krell aesthetic, while allowing placement in smaller equipment racks. \u003cbr\u003e\u003cbr\u003e\n \nThe Foundation 4K UHD features Krell's Automatic Room Equalization System (ARES), to ensure the best possible performance from every theater. ARES analyzes all the speakers in the system, their location, phase, and distance from each other, to determine the best crossover frequency, delay, and more. In addition, ARES incorporates the acoustics of the room to determine unique EQ curves for each of the 7.1 output channels. Unlike other room EQs, ARES can be programmed to only adjust the troublesome low frequencies, leaving high frequencies unaltered. \u003cbr\u003e\u003cbr\u003e\n \n The Foundation 4K UHD includes a new Krell development - Intelligent HDMI switching. Intelligent HDMI switching is a combination of circuitry and innovative software that optimizes HDMI operation. Various parameters including the monitor's electronic ID and source video resolution are stored in non-volatile memory. All 10 source inputs are always active so source, channel, video resolution, and audio format changes are instantaneous. The Intelligent HDMI design provides the fastest signal recognition possible. \u003cbr\u003e\u003cbr\u003e\n \nThe Foundation 4K UHD passes video signals directly without any video processing, ensuring bit-for-bit accuracy of the signal, up to 3840x2160. However, to simplify cabling, setup, and use, there is full transcoding of the 2 composite and 3 component analog video inputs to the HDMI outputs. \u003cbr\u003e\u003cbr\u003e\n \nKrell designed the Foundation 4K UHD with flexibility and ease-of-use in mind, with extensive routing capability of the audio inputs to the various outputs. During setup, the specific paths will be chosen based on how the user intends to use each source, displays, and audio output channels. \u003cbr\u003e\u003cbr\u003e\n \nThe Foundation 4K UHD supports stereo and multichannel DSD decoding via any of the 10 HDMI inputs. Playback options include DSD 2-ch Direct, DSD Stereo, and DSD Multi modes. DSD 2-ch Direct converts a stereo DSD signal to analog and directly passes it to the left and right analog outputs. DSD Stereo first applies any left and right channel crossover configured in the Foundation 4K UHD menu, converts the signal to analog, and then sends it to the left and right outputs. DSD Multi supports multichannel DSD recordings and utilizes all crossovers configured in the Foundation 4K UHD menu. There is no configuration required as the Foundation 4K UHD automatically recognizes a DSD signal and defaults to the last used DSD mode for playback. Pressing the mode button on the remote control or web server interface will cycle through all three DSD modes. \u003cbr\u003e\u003cbr\u003e\n \nThe Foundation 4K UHD will allow owners to take full advantage of the best audio soundtracks available, with decoding of Dolby Digital, Digital Plus, Dolby TrueHD, DTS, DTS-ES Discrete, Matrix, and DTS-HD Master Audio. In addition, a full suite of post-processing modes are included, including Dolby Pro Logic IIx and DTS Neo 6. Krell's proprietary surround modes, Party, General Admission, Front Row, and On Stage, offer a different way to listen to favorite tracks.\u003cbr\u003e\u003cbr\u003e \n \nThe Foundation 4K UHD also offers features that make it perfect for custom installation, such as 3.5mm jacks for IR input and 12-volt trigger input and output, as well as RC-5 and optional rack-mount ears. Additionally, the unit can be controlled with home automation systems via RS-232 or the Krell web server through its Ethernet connection. \u003cbr\u003e\u003cbr\u003e\n \n\n\nThe Foundation also offers features that make it perfect for custom installation, such as 3.5mm jacks for IR input and 12-volt trigger input and output, as well as RC-5 and optional rack-mount ears. Additionally, the unit can be controlled with home automation systems via RS-232 or the Krell web server through its Ethernet connection. \n \n","brand":"Krell","offers":[{"title":"Krell Foundation 4K AV Processor","offer_id":57409319797068,"sku":"KRELLFOUNDATION4K","price":7498.33,"currency_code":"GBP","in_stock":true},{"title":"Krell Foundation 4K Upgrade to original Foundation model","offer_id":57420002525516,"sku":"KRELLFOUNDATION4KUPGRADE","price":2498.33,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Foundation-4KUHD_2.jpg?v=1777482455"},{"product_id":"krell-connect","title":"Krell Connect","description":"\u003cp\u003eThe Krell Connect, the ultimate in high-resolution audio streaming technology. From FLAC to WAV, MP3 and WMA, the Connect plays back up to 192kHz\/24-bit audio plus Internet radio, all to Krell's highest fidelity standards.\u003c\/p\u003e\n\u003cp\u003eThe Wi-Fi equipped Connect is available in two forms: digital only, or with a built-in Digital-to-Analog Converter (DAC) module. The DAC-equipped Connect has a 32-bit ESS Sabre chipset with discrete, direct-coupled analog circuitry outputting via RCA or balanced audio outputs. The digital-only version has both coax and Toslink optical outputs.\u003cbr\u003e \u003cbr\u003eExtensive audio libraries are easy to navigate via the Connect's built-in 3.5-inch QVGA LCD screen. Alternately, full-featured iOS and Android apps offer full control from anywhere in the home.\u003cbr\u003e \u003cbr\u003eIn addition to playback of FLAC and WAV files up to 192kHz\/24-bit, the Connect also streams Ogg, WMA, and MP3. Unlike some music streamers, gapless playback is possible, allowing for no breaks between album tracks. Live concert albums, for example, can be played as a seamless, uninterrupted experience\u003cbr\u003e \u003cbr\u003eInternet radio gets the same conversion as the high-resolution files (on DAC-equipped models), providing the best possible sound quality from on line streaming content.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eKey Features:\u003cbr\u003e*Up to 192kHz\/24-bit playback\u003cbr\u003e*3.5-inch QVGA (320x240) LCD Display\u003cbr\u003e*Internet Radio UPnP\/DLNA-compliant\u003cbr\u003e*iOS and Android apps for control. IR Remote optional.\u003cbr\u003e*V-Tuner equipped *Wi-Fi and USB connectivity\u003cbr\u003e*Rack Mountable\u003cbr\u003e*Optional 32-bit ESS Sabre DAC features 192k\/24-bit playback, with Krell fully discrete, balanced, Current mode analog circuitry\u003cbr\u003e*DAC model features RCA and Balanced outputs.\u003cbr\u003e*Supported Formats: FLAC, Ogg, WAV, WMA, MP3.\u003c\/p\u003e","brand":"Krell","offers":[{"title":"Digital Out (2nd User, Perfect condition)","offer_id":57409342636364,"sku":"KRELLCONNECTDO","price":2081.67,"currency_code":"GBP","in_stock":true},{"title":"Analogue Out","offer_id":57420074844492,"sku":"KRELLCONNECTDO","price":2915.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/krell-connect-ao.jpg?v=1777483254"},{"product_id":"krell-chorus-7200-xd-7200xd-7-channel-power-amplifier","title":"Krell Chorus 7200 XD (7200XD) 7 Channel Power Amplifier","description":"CHORUS 7200 XD 7 Channel Power Amplifier\u003cbr\u003e\n200 Watt Amplifier Featuring Krell iBias Technology \u003cbr\u003e\u003cbr\u003e\n\nKrell's New XD Technology\u003cbr\u003e\nKrell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended Detail) upgrade for the iBias amplifiers takes analready great sounding amplifier and raises its performance to the next level. “XD” is a classic example of Krell’s continuous R \u0026amp; D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier they discovered substantial sonic improvements by lowering the output impedance below traditional norms. So they applied this technique to their existing line of amplifiers and the improvement was so substantial that it required a unique designation, hence, “XD.”\u003cbr\u003e\u003cbr\u003e\n\nIt was no simple matter to just lower the output impedance. This affects the amplifier’s stability and transient response so each stage prior to the output stage had to be re-tuned to work optimally with the lower output impedance. This lower output impedance exerts more control over the speaker drivers and damps out unwanted vibrational modes, allowing a more accurate reproduction of the original signal.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003e\u003cbr\u003e\n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, –0.08 dB\u003cbr\u003e\n \u0026lt; 0.5 Hz to 100 kHz +0, –3 dB \u003cbr\u003e\u003cbr\u003e\n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 95 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 115 dB, “A”-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain: 26.2 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt; 0.04% at 1 kHz, at 200 W, 8 Ω\u003cbr\u003e \n \u0026lt; 0.15% at 20 kHz, at 200 W, 8 Ω \u003cbr\u003e\u003cbr\u003e\n\nInput impedance:\u003cbr\u003e\n Single-ended: 100 kΩ \u003cbr\u003e\nBalanced: 200 kΩ\u003cbr\u003e\u003cbr\u003e \n\nInput sensitivity:\u003cbr\u003e\n Single-ended or balanced: 1.96 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput power:\u003cbr\u003e \n200 W RMS at 8 Ω \u003cbr\u003e\n360 W RMS at 4 Ω \u003cbr\u003e\u003cbr\u003e\n\nOutput voltage:\u003cbr\u003e\n 113 V peak-to-peak\u003cbr\u003e\n 40 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput current:\u003cbr\u003e\n 13.4 A peak\u003cbr\u003e\u003cbr\u003e\n\nSlew rate:\u003cbr\u003e\n 40 V\/μs\u003cbr\u003e\u003cbr\u003e\n\nOutput impedance:\u003cbr\u003e\n \u0026lt; 0.015Ω, 20 Hz to 20 kHz\u003cbr\u003e\u003cbr\u003e\n\nDamping factor:\u003cbr\u003e\n \u0026gt; 530, 20 Hz to 20 kHz, referred to 8 W\u003cbr\u003e\u003cbr\u003e\n\n Power consumption:\u003cbr\u003e\n Standby: 1 W\u003cbr\u003e\nIdle: 255 W\u003cbr\u003e\n Maximum: 2800 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output \u0026lt; Standby: 3.4 BTU\/hr.\u003cbr\u003e\n Idle: 873 BTU\/hr.\u003cbr\u003e\n Maximum: 9590 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 7 single-ended via RCA connector\u003cbr\u003e\n 7 balanced via XLR connector\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 7 pairs binding posts\u003cbr\u003e\u003cbr\u003e\n\nDimensions: \u003cbr\u003e\n17.1 in. W x 7.65 in. H x 21.10 in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536 mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight:\u003cbr\u003e \n 110 lbs., 50 kg (shipping)\u003cbr\u003e\n 100 lbs., 45.4 kg (unit only)","brand":"Krell","offers":[{"title":"Default Title","offer_id":57409348632908,"sku":"KRELLCHORUS7200XD","price":10831.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/krell-chorus-7200.jpg?v=1777483509"},{"product_id":"krell-chorus-5200-xd-5200xd-5-channel-power-amplifier","title":"Krell Chorus 5200 XD (5200XD) 5 Channel Power Amplifier","description":"CHORUS 5200 XD 5 Channel Power Amplifier\u003cbr\u003e\n200 Watt Amplifier Featuring Krell iBias Technology \u003cbr\u003e\u003cbr\u003e\n\nKrell's New XD Technology\u003cbr\u003e\nKrell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended Detail) upgrade for the iBias amplifiers takes analready great sounding amplifier and raises its performance to the next level. “XD” is a classic example of Krell’s continuous R \u0026amp; D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier they discovered substantial sonic improvements by lowering the output impedance below traditional norms. So they applied this technique to their existing line of amplifiers and the improvement was so substantial that it required a unique designation, hence, “XD.”\u003cbr\u003e\u003cbr\u003e\n\nIt was no simple matter to just lower the output impedance. This affects the amplifier’s stability and transient response so each stage prior to the output stage had to be re-tuned to work optimally with the lower output impedance. This lower output impedance exerts more control over the speaker drivers and damps out unwanted vibrational modes, allowing a more accurate reproduction of the original signal.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003e\u003cbr\u003e\n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, –0.08 dB\u003cbr\u003e\n \u0026lt; 0.5 Hz to 100 kHz +0, –3 dB\u003cbr\u003e\u003cbr\u003e \n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 95 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 115 dB, “A”-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain: 26.2 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt; 0.04% at 1 kHz, at 200 W, 8 Ω \u003cbr\u003e\n \u0026lt; 0.15% at 20 kHz, at 200 W, 8 Ω \u003cbr\u003e\u003cbr\u003e\n\nInput impedance:\u003cbr\u003e\n Single-ended: 100 kΩ \u003cbr\u003e\nBalanced: 200 kΩ \u003cbr\u003e\u003cbr\u003e\n\nInput sensitivity:\u003cbr\u003e\n Single-ended or balanced: 1.96 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput power:\u003cbr\u003e \n200 W RMS at 8 Ω\u003cbr\u003e \n360 W RMS at 4 Ω \u003cbr\u003e\u003cbr\u003e\n\nOutput voltage:\u003cbr\u003e\n 113 V peak-to-peak\u003cbr\u003e\n 40 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput current:\u003cbr\u003e\n 13.4 A peak\u003cbr\u003e\u003cbr\u003e\n\nSlew rate:\u003cbr\u003e\n 40 V\/μs\u003cbr\u003e\u003cbr\u003e\n  \nOutput impedance:\u003cbr\u003e\n \u0026lt; 0.015Ω, 20 Hz to 20 kHz\u003cbr\u003e\u003cbr\u003e\n\nDamping factor:\u003cbr\u003e\n \u0026gt; 530, 20 Hz to 20 kHz, referred to 8W\u003cbr\u003e\u003cbr\u003e\n\nPower consumption:\u003cbr\u003e\n Standby: 1 W\u003cbr\u003e\nIdle: 182 W\u003cbr\u003e\n Maximum: 2100 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output \u0026lt; Standby: 3.4 BTU\/hr.\u003cbr\u003e\n Idle: 623 BTU\/hr.\u003cbr\u003e\n Maximum: 7182 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 5 single-ended via RCA connector\u003cbr\u003e\n 5 balanced via XLR connector\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 5 pairs binding posts\u003cbr\u003e\u003cbr\u003e\n\nDimensions:\u003cbr\u003e\n 17.1 in. W x 7.65 in. H x 21.10 in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536 mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight: \u003cbr\u003e\n 95 lbs., 43.2 kg (shipping)\u003cbr\u003e\n 85 lbs., 38.6 kg (unit only)","brand":"Krell","offers":[{"title":"Default Title","offer_id":57409362166092,"sku":"KRELLCHORUS5200XD","price":8748.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/krell-chorus-7200_4ea1976e-3f39-4967-be24-06926a3b08c4.jpg?v=1777483782"},{"product_id":"krell-illusion-pre-amplifier","title":"Krell Illusion - Pre Amplifier","description":"Kell announces the Krell Illusion preamplifier. An Ideal companion for the new Class A series of iBias power amps , the Illusion preamplifier is a perfect centerpieces for a world class two channel audio systems. \u003cbr\u003e\u003cbr\u003e\n\n\n\n The Krell Illusion preamplifier is a dual monaural circuit design with the left and right channels afforded their own power supply regulation and individual full chassis sized boards. All signal gain is realized in surface mount topology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs. 1.5 MHz open loop bandwidth in a zero feedback, balanced, Krell Current Mode design terminating in Krell CAST. The Illusion preamplifier extends the Krell tradition of separating the power supply from the audio circuitry in our flagship preamplifiers. Sharing the new Class A iBias power amplifier aesthetic and featuring Krell CAST technology, the Illusion preamplifier is the ideal match for the new Solo 375 and Solo 575 power amplifiers.\u003cbr\u003e\u003cbr\u003e\n\nSpecifications:- \u003cbr\u003e\n\n\n  Inputs\u003cbr\u003e\n\n      2 pr. CAST via 4-pin bayonet connectors\u003cbr\u003e\n\n      2 pr. balanced via XLR connectors\u003cbr\u003e\n\n    3 pr. single-ended via RCA connectors\u003cbr\u003e\n\n    Tape input\u003cbr\u003e\n\n    1 pr. single-ended via RCA connector\u003cbr\u003e\n\n    Main outputs\u003cbr\u003e\n\n    2 pr. CAST via 4-pin bayonet connectors\u003cbr\u003e\n\n    1 pr. balanced via XLR connector\u003cbr\u003e\n\n    1 pr. single-ended via RCA connector\u003cbr\u003e\n\n    Subwoofer outputs\u003cbr\u003e\n\n    1 pr. balanced via XLR connector\u003cbr\u003e\n\n    1 pr. single-ended via RCA connector\u003cbr\u003e\n\n    Tape outputs\u003cbr\u003e\n\n    1 pr. single-ended via RCA connector,buffered\u003cbr\u003e\n\n    Control inputs\u003cbr\u003e\n\n    1 RS-232 input via a 9-pin D-subminiature connector\u003cbr\u003e\n\n    1 remote IR detector input via a 3-conductor 3.5 mm connector\u003cbr\u003e\n\n    1 12 VDC trigger input via 3.5 mm connector\u003cbr\u003e\n\n    1 preamplifier link via an RJ-45 connector\u003cbr\u003e\n","brand":"Krell","offers":[{"title":"Krell Illusion - Pre Amplifier","offer_id":57409459880268,"sku":"KRELLILLUSION","price":14998.33,"currency_code":"GBP","in_stock":true},{"title":"Krell Illusion Crossover - Optional Crossover Plug In for Illusion","offer_id":57420947620172,"sku":"KRELLILLUSIONCROSSOVER","price":2498.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Illusion-preamplifier.jpg?v=1777486281"},{"product_id":"krell-illusion-ii-pre-amplifier","title":"Krell Illusion II - Pre Amplifier","description":"The Illusion II is the perfect centerpiece for a world class digital and analog audio system. Added to the normal selection of balanced and single- ended inputs are five digital inputs. The digital module features AES\/EBU, coaxial, and optical digital inputs for use with streaming devices or other digital sources.\u003cbr\u003e\u003cbr\u003e\n\n \n\n\n\nDESCRIPTION :\u003cbr\u003e\u003cbr\u003e\n\n\n\n Circuitry Highlights: the Illusion II preamplifier is a dual monaural design with the left and right channels afforded their own power supply regulation and individual circuit boards. All signal gain is executed with surface mount technology using proprietary multiple-output current mirrors with nearly 500 times the open loop linearity of other designs. Featuring 700 kHz bandwidth in a zero feedback, balanced, Krell Current Mode design, the Illusion II shares the same design philosophy as its bigger brother, the flagship Illusion preamplifier. Negative feedback is not used anywhere in the preamp, nor is it necessary. Open-loop distortion is typically less than 0.003%. The volume control is realized with a balanced resistor ladder - bandwidth and transient response of the preamp circuitry are virtually unaffected by the volume setting.\u003cbr\u003e\u003cbr\u003e\n\n\nThe headphone circuitry is identical to the main circuitry, offering private listening with the same performance as speaker playback. Digital Module Highlights :the digital module supports up to 24 bit\/192kHz LPCM. All digital signals are fed to an ESS Sabre DAC and then sent to Krell’s Current Mode, discrete, balanced analog circuitry. Power Supply Highlights: oversized for a preamplifier, the power supply features a 95 VA transformer and 40,000 µF of capacitance giving it the ability to respond quickly to musical demands. The large power supply improves noise rejection and renders the Illusion II impervious to all but the most severe AC voltage power fluctuations. A new eco-friendly standby mode reduces power consumption to 2W.\u003cbr\u003e\u003cbr\u003e\n\n\nSpecifications:-\u003cbr\u003e \n\nAnalog Inputs\u003cbr\u003e\n\n 2 pr. balanced via XLR connectors\u003cbr\u003e\n\n3 pr. Single ended via RCA connectors\u003cbr\u003e\n\nDigital Inputs\u003cbr\u003e\n\n1 AES\/EBU via XLR connector\u003cbr\u003e\n\n2 coaxial via RCA connectors\u003cbr\u003e\n\n  2 optical via Toslink connectors\u003cbr\u003e\n\n Main outputs\u003cbr\u003e\n\n 1 balanced via XLR connectors\u003cbr\u003e\n\n 1 pr. single ended via RCA connectors\u003cbr\u003e\n\n Headphone output\u003cbr\u003e\n\n 1 via 3-conductor 6.35 mm (1\/4 inch) connector\u003cbr\u003e\n\n Control inputs\u003cbr\u003e\n\n1 RS-232 input via a 9-pin D-subminiature connector\u003cbr\u003e\n\n 1 remote IR detector input via a 3-conductor 3.5 mm connector\u003cbr\u003e\n\n1 12 VDC trigger input via 2-conductor 3.5 mm connector\u003cbr\u003e\n\nControl outputs\u003cbr\u003e\n\n2 individually programmable 12 VDC trigger outputs via 2-conductor 3.5mm  connectors (30 mA maximum per output)","brand":"Krell","offers":[{"title":"Default Title","offer_id":57409460044108,"sku":"KRELLILLUSIONII","price":7081.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Illusion-II-preamplifier.jpg?v=1777486285"},{"product_id":"krell-duo-175-xd-175xd-2-channel-power-amplifier","title":"Krell Duo 175 XD (175XD) - 2 Channel Power Amplifier","description":"Duo 175 XD: Stereo Amplifiers\u003cbr\u003e\u003cbr\u003e\n   \nKrell's New XD Technology\u003cbr\u003e\nKrell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended Detail) upgrade for the iBias amplifiers takes analready great sounding amplifier and raises its performance to the next level. “XD” is a classic example of Krell’scontinuous R \u0026amp; D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier they discovered substantial sonic improvements by lowering the output impedance below traditional norms. So they applied this technique to our existing line of amplifiers and the improvement was so substantial that it required a unique designation, hence, “XD.”\u003cbr\u003e\u003cbr\u003e\n\nIt was no simple matter to just lower the output impedance. This affects the amplifier’s stability and transient response so each stage prior to the output stage had to be re-tuned to work optimally with the lower output impedance. This lower output impedance exerts more control over the speaker drivers and damps out unwanted vibrational modes, allowing a more accurate reproduction of the original signal.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003e\u003cbr\u003e \n\n2 Channel Power Amplifier:\u003cbr\u003e\n175 Watt Amplifier Featuring Krell iBias Technology \u003cbr\u003e\u003cbr\u003e\n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, -0.08 dB\u003cbr\u003e\n 0.5 Hz to 100 kHz +0, -3 dB\u003cbr\u003e\u003cbr\u003e\n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 95 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 115 dB, \"A\"-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain:\u003cbr\u003e\n 26.2 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt; 0.03% at 1 kHz, at 175 W, 8 Ω \u003cbr\u003e\n \u0026lt; 0.13% at 20 kHz, at 175 W, 8 Ω \u003cbr\u003e\u003cbr\u003e\n\nInput Impedance:\u003cbr\u003e\nSingle-ended: 100 kΩ \u003cbr\u003e\nBalanced: 200 kΩ \u003cbr\u003e\u003cbr\u003e\n\nInput sensitivity:\u003cbr\u003e\n Single-ended or balanced: 1.84 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput power:\u003cbr\u003e\n 175 W RMS at 8 Ω\u003cbr\u003e\n350 W RMS at 4 Ω\u003cbr\u003e\u003cbr\u003e\n\nOutput voltage:\u003cbr\u003e\n 106 V peak-to-peak\u003cbr\u003e\n 37 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput current:\u003cbr\u003e\n 13 A peak\u003cbr\u003e\u003cbr\u003e\n  \nSlew rate:\u003cbr\u003e\n 40 V\/μs \u003cbr\u003e\u003cbr\u003e\n\nOutput impedance:\u003cbr\u003e\n \u0026lt; 0.015Ω, 20 Hz to 20 kHz\u003cbr\u003e\u003cbr\u003e\n\nDamping factor:\u003cbr\u003e\n \u0026gt; 530, 20 Hz to 20 kHz, referred to 8 Ω\u003cbr\u003e\u003cbr\u003e\n\nPower consumption:\u003cbr\u003e\n Standby: 1 W\u003cbr\u003e\n Idle: 73 W\u003cbr\u003e\n Maximum: 1500 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output:\u003cbr\u003e\n Standby: 3.42 BTU\/hr.\u003cbr\u003e\n Idle: 250 BTU\/hr.\u003cbr\u003e\n Maximum: 5137 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 2 single-ended via RCA connector\u003cbr\u003e\n 2 balanced via XLR connector\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 2 pairs binding posts\u003cbr\u003e\u003cbr\u003e\n\nDimensions:\u003cbr\u003e\n 17.1 in. W x 7.65 in. H x 21.10in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight:\u003cbr\u003e\n 70 lbs., 31.8 kg (shipping)\u003cbr\u003e\n 60 lbs., 27.3 kg (unit only)","brand":"Krell","offers":[{"title":"Default Title","offer_id":57409460109644,"sku":"KRELLDUO175XD","price":7831.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Duo-175-Power-Amplifier.jpg?v=1777486290"},{"product_id":"krell-trio-300-xd-300xd-3-channel-power-amplifier","title":"Krell Trio 300 XD (300XD) - 3 Channel Power Amplifier","description":"Krell's New XD Technology\u003cbr\u003e\u003cbr\u003e\n\nKrell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended Detail) upgrade for the iBias amplifiers takes analready great sounding amplifier and raises its performance to the next level. “XD” is a classic example of Krell’scontinuous R \u0026amp; D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier we discovered substantial sonic improvements by lowering the output impedance below traditional norms. So we applied this technique to our existing line of amplifiers and the improvement was sosubstantial that it required a unique designation, hence, “XD.”\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003ev \n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, –0.13 dB\u003cbr\u003e\n \u0026lt; 0.5 Hz to 100 kHz +0, –3 dB \u003cbr\u003e\u003cbr\u003e\n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 98 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 116 dB, “A”-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain: 26.2 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt; 0.045% at 1 kHz, at 300 W, 8 Ω \u003cbr\u003e\n \u0026lt; 0.17% at 20 kHz, at 300 W, 8 Ω \u003cbr\u003e\u003cbr\u003e\n\nInput impedance:\u003cbr\u003e\n Single-ended: 100 kΩ \u003cbr\u003e\nBalanced: 200 kΩ \u003cbr\u003e\u003cbr\u003e\n\nInput sensitivity: Single-ended or balanced: 2.4 V RMS\u003cbr\u003e\nOutput power: 300 W RMS at 8 Ω \/ 540 W RMS at 4 Ω \u003cbr\u003e\nOutput voltage:  138 V peak-to-peak \/  49 V RMS\u003cbr\u003e\nOutput current:  16 A peak\u003cbr\u003e\nSlew rate:  40 V\/μs\u003cbr\u003e\nOutput impedance:  \u0026lt; 0.007Ω, 20 Hz to 20 kHz\u003cbr\u003e\nDamping factor:  \u0026gt; 1140, 20 Hz to 20 kHz, referred to 8W\u003cbr\u003e\u003cbr\u003e\nPower consumption:\u003cbr\u003e\n Standby: 4 W\u003cbr\u003e\nIdle: 200 W\u003cbr\u003e\n Maximum: 2160 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output: \u0026lt; Standby: 13.7 BTU\/hr.\u003cbr\u003e\n Idle: 800 BTU\/hr.\u003cbr\u003e\n Maximum: 7387 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 3 single-ended via RCA connector\u003cbr\u003e\n 3 balanced via XLR connector\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 3 pairs binding posts\n\u003cbr\u003e\u003cbr\u003e\nDimensions: 17.1 in. W x 7.65 in. H x 21.10 in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536 mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight: \u003cbr\u003e\n 100lbs., 45.4 kg (shipping)\u003cbr\u003e\n 85 lbs., 38.6 kg (unit only)","brand":"Krell","offers":[{"title":"Default Title","offer_id":57409460535628,"sku":"KRELLTrio300XD","price":11665.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Trio-300-XD.jpg?v=1777486295"},{"product_id":"krell-solo-375-xd-375xd-mono-power-amplifier","title":"Krell Solo 375 XD (375XD) Mono Power Amplifier","description":"Krell Solo 375XD\u003cbr\u003e\u003cbr\u003e\n\nMono Amplifiers\u003cbr\u003e\u003cbr\u003e\n   \nKrell's New XD Technology\u003cbr\u003e\nKrell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended Detail) upgrade for the iBias amplifiers takes an already great sounding amplifier and raises its performance to the next level. “XD” is a classic example of Krell’s continuous R \u0026amp; D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier we discovered substantial sonic improvements by lowering the output impedance belowtraditional norms. So we applied this technique to our existing line of amplifiers and the improvement was so substantial that it required a unique designation, hence, “XD.”\u003cbr\u003e\u003cbr\u003e\n\nIt was no simple matter to just lower the output impedance. This affects the amplifier’s stability and transientresponse so each stage prior to the output stage had to be re-tuned to work optimally with the lower outputimpedance. This lower output impedance exerts more control over the speaker drivers and damps out unwanted vibrational modes, allowing a more accurate reproduction of the original signal.\u003cbr\u003e\u003cbr\u003e\n\nKrell Class A iBias Technology\u003cbr\u003e\nKrell's history is rich with breakthrough Class A amplifiers that have helped build the Krell legacy of offering the best sounding amplifiers available. Audiophiles have always considered Class A technology to be the best sounding operating state for amplifiers. However, despite Class A's unrivaled sound quality, it has fallen out of fashion because of recent demands to reduce power consumption and heat in home electronics products. Krell engineering took this challenge and redefined the meaning of high performance power amplifier. Our goal - unmatched performance, elegant design, and a compelling array of features. The breakthrough - a patent pending circuit delivering Class A operation without the excessive heat and wasted energy of conventional designs,housed in a striking new form factor, with network connectivity for advanced access and monitoring. The sound is open and unconstrained, in a manner that rivals live performance and the true sound of voices and instruments. Music and dialogue are reproduced with a richness, detail, and startling dynamics that fill a room.\u003cbr\u003e\u003cbr\u003e\n\nPlainly stated, Class A designs are the most musically accurate circuit topology available. Class A amplifiers do not suffer from the inherent distortions that all Class AB amplifiers experience. In a traditional Class A design, the output transistors conduct full current at all times regardless of the actual demand from the speakers. Often, only a fraction of this power is needed to reproduce an audio signal at normal listening levels. The rest of the power is dissipated through the amplifier’s heatsinks, producing large amounts of wasted heat. With Krell's iBias™technology, bias is dynamically adjusted, so the output transistors receive exactly as much power - but only as much power - as they need.\u003cbr\u003e\u003cbr\u003e\n\nKrell's iBias Class A technology allows our latest amplifiers to run infull Class A mode to full power while minimizing heat generation. Previous efforts at using a \"tracking\" bias, while effective, only measured the incoming signal and set bias levels from this information. Their new patent pending iBias technology significantly elevates the effectiveness of previous designs by calculating bias from the output stage. This seemingly small change in topology results in a dramatic improvement in sound quality, especially midrange richness and purity.\u003cbr\u003e\u003cbr\u003e\n\nThe core of the technology is an innovative, patent pending design fora dynamic intelligent bias circuit. Our iBias Class A circuit directly measures the output current of the amplifier and adjusts the bias to the optimum level. Because iBias Class A measures the output current, the realtime demands of the specific speaker connected to the amp are directly incorporated into the circuit function. In addition, iBias Class A evenreduces the bias when the signal is at very low levels, making its operationundetectable by ear and even by standard amplifier measurements.\u003cbr\u003e\u003cbr\u003e\n\nIn sliding bias schemes, the circuit merely estimates how much bias isneeded based on the input signal and an \"assumed speaker load.\" Compared with iBias Class A, these sliding bias technologies are much less effective - and much less accurate.\u003cbr\u003e\u003cbr\u003e\n\nPower Supply Highlights\u003cbr\u003e\n Power supply technology has always been an important contributor to the Krell sound. The power supplies of our Krell iBias Class A amplifiers have been optimized for use with the iBias circuit. Depending on the model, up to four toroidal transformers feed amplifier modules that include the audio circuitry, rectifier, and power supply filtering mounted to an individual heat sink. This design shortens the electrical path from the power supply to the output transistors, reducing the overall impedance and allowing the circuit to respond faster and control the speakers even better and more accurately.\u003cbr\u003e\u003cbr\u003e\n\nUnlike traditional Class A amplifiers, iBias Class A amps have a compact design that allows rack-mounting, making them ideal for custom installation as well as traditional audiophile systems. This convenient form factor is made possible through thermostatically controlled ventilation fans. The fans used are specifically chosen for quiet operation, and operate at the speed required to maintain the ideal internal temperature. They run only during periods of peak energy demand - when the music is at its loudest - so they are inaudible in normal use. \u003cbr\u003e\u003cbr\u003e\n\nNetwork Connectivity\u003cbr\u003e\nThe new amplifiers include RJ 45 Ethernet connectivity and an internal web page that is accessible from any smartphone, tablet, or laptop. Network connectivity brings convenience, monitoring, and reporting to end users. Amplifier configuration options include display brightness and timeout. For energy conservation, the amplifiers can be programmed to power off at a preset time of inactivity. Individual channels can be muted and firmware updates can be initiated from the web server.\u003cbr\u003e\u003cbr\u003e\n\nOnce the amplifier is connected to a network router with Internet access, the amplifier's advanced protection systems are now viewable on an Internet-connected device. Excessive current, output DC, fan speeds, short circuit, and overheating are all monitored in real time. If an issue occurs, the fault is displayed on the front panel and reported on the web server interface. Emails will automatically be sent to as many as three email addresses to notify the end user and\/or the dealer of the condition.\u003cbr\u003e\u003cbr\u003e\n\nCircuitry Highlights\u003cbr\u003e\n The new iBias circuitry is built on a foundation of core Krell circuit technologies. All signal gain is realized in the current domain using proprietary multiple-output current mirrors with extraordinary open loop linearity. Each amplifier channel uses all discrete components. There are no generic integrated circuits or op amps used anywhere. Gain is distributed among several stages, allowing each to have a large linear operating area.\u003cbr\u003e\u003cbr\u003e\n\nAudio signal voltages are converted to current at the amplifier input, and the audio signal remains in the current domain throughout the entire amplifier. \u003cbr\u003e\u003cbr\u003e\n\nCurrent mirrors in the final gain stages use a new output power device that operates at a 73% higher voltage, delivers almost 10% more current, and offers 120 watts of additional power handling capability as compared to other devices.\u003cbr\u003e\u003cbr\u003e \n \nWith this combination, the iBias amplifiers may now deliver substantially more power while using a smaller footprint. Normally used in demanding, high-bandwidth video circuits, these transistors allow the design of gain stages with superb accuracy and very low distortion. The signal path is fully complementary and fully balanced from input to output. Independent complementary pre driver and driver stages for the positive and negative output transistors make the output stages extremely fast and linear. This unique circuit is impervious to low-impedance or reactive loads; it simply drives any loudspeaker with absolute confidence, achieving the very best possible sonic results.\u003cbr\u003e\u003cbr\u003e\n\nMost amplifiers use coupling capacitors in the signal path to block DC and prevent damaging offset voltages from reaching your speakers. Krell amplifiers are fully direct-coupled, with no capacitors in the audio signal path. This design gives the Krell amplifiers lower internal impedance, which allows firmer, more precise control of your speakers. It also provides flatter, more extended low-frequency response, because coupling capacitors not only block DC but also affect the lowest bass frequencies. Krell employs expensive, non intrusive DC servos that remove DC without impacting the musical signal. Thus, the iBias Class A amplifiers deliver the full breadth of the music with detail, impact, and space intact.\u003cbr\u003e\u003cbr\u003e\n\nKrell CAST™\u003cbr\u003e\n Reserved for the Solo 375 and Solo 575 is our CAST inputs and circuitry. Current Audio Signal Transmission, termed CAST, is a revolutionary method of connecting analog audio components for unparalleled sonic performance. In traditional audio systems, each component is a discrete entity with unique characteristics that act upon the musical signal independently. Each component is unaware of the other components in the system. The cables that connect the components also have their own electrical characteristics, which affect the sonic presentation of the entire system. Krell CAST™ unifies individual components and interconnects them into an electrically linked whole. The original signal remains unaltered from source to speaker. Still equipped with standard connections for use with other components, the full expression of Krell technology is realized when the system is connected using Krell CAST MMF interconnects. Krell CAST connected systems offer significant improvements in every performance area: speed, precision, dynamic range, depth and width of the sound stage, transient impact, and tonal balance.\u003cbr\u003e\u003cbr\u003e\n\nEverything Audiophiles and Home Theater Fans Could Want in an Amplifier\u003cbr\u003e\n Krell iBias Class A amplifiers are the first to deliver the rich musicality of Class A amplifiers, the uncompromised dynamics of classic Krell amplifiers, and the efficiency and low power consumption of Class G and H amplifiers.\u003cbr\u003e\u003cbr\u003e\n\nBecause the iBias circuit eliminates crossover distortion, the amplifier is able to resolve more of the detail and microdynamics in even the best analog recordings. Simply put, the music breathes. Whether an iBias amplifier is called on to reproduce the extreme dynamic range of high-resolution digital files, the minute intricacies of a 45-rpm, 180-gram vinyl record, or the complexity of today’s latest blockbuster action film, it does so without altering or abating the music in any way.\u003cbr\u003e\u003cbr\u003e\n\nThe iBias amplifiers' unprecedented ability to retrieve the subtlest details gives their sound an incredible dimensionality, with an ambient, broad and extraordinarily deep soundstage. As spacious as the sound is, though, the amplifiers are still able to produce pinpoint stereo imaging if the recording calls for it.\u003cbr\u003e\u003cbr\u003e\n\nIt's all the power and control for which Krell has always been famous, with a level of resolution and musicality in the midrange and treble that has simply never been heard before.\u003cbr\u003e\u003cbr\u003e\n\nIn short, the new patent pending iBias Class A Krell amplifers give today's audiophiles and home theater fans everything they could possibly want in an amplifier.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003e\u003cbr\u003e\n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, –0.15 dB\u003cbr\u003e\n \u0026lt; 0.5 Hz to 100 kHz +0, –3 dB\u003cbr\u003e\u003cbr\u003e\n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 103 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 114 dB, \"A\"-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain: 27 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt; 0.03% at 1 kHz, at 375 W, 8 Ω \u003cbr\u003e\n \u0026lt; 0.19% at 20 kHz, at 375 W, 8 Ω\u003cbr\u003e\u003cbr\u003e \n\nInput Impedance:\u003cbr\u003e\n Single-ended: 100 kΩ \u003cbr\u003e\nBalanced: 200 kΩ \u003cbr\u003e\u003cbr\u003e\n\nInput sensitivity:\u003cbr\u003e\n Single-ended or balanced: 2.45 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput power:\u003cbr\u003e\n 375 W RMS at 8 Ω\u003cbr\u003e\n600 W RMS at 4 Ω\u003cbr\u003e\u003cbr\u003e\n\nOutput voltage:\u003cbr\u003e\n 154 V peak-to-peak\u003cbr\u003e\n 55 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput current: 17 A peak\u003cbr\u003e\u003cbr\u003e\n  \nSlew rate: 40 V\/μs \u003cbr\u003e\u003cbr\u003e\n\nOutput impedance:\u003cbr\u003e\n \u0026lt; 0.018Ω, 20 Hz to 20 kHz\u003cbr\u003e\u003cbr\u003e\n\nDamping factor:\u003cbr\u003e\n \u0026gt; 440, 20 Hz to 20 kHz, referred to 8 \u003cbr\u003e\u003cbr\u003e\n\nPower consumption:\u003cbr\u003e\n Standby: 1 W\u003cbr\u003e\n Idle: 66 W\u003cbr\u003e\n Maximum: 1150 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output:\u003cbr\u003e\n Standby: 3.42 BTU\/hr.\u003cbr\u003e\n Idle: 225 BTU\/hr.\u003cbr\u003e\n Maximum: 3933 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 1 single-ended via RCA connector\u003cbr\u003e\n 1 balanced via XLR connector\u003cbr\u003e\n 1 CAST\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 1 pairs binding posts\u003cbr\u003e\u003cbr\u003e\n\nDimensions:\u003cbr\u003e\n 17.1 in. W x 7.65 in. H x 21.10in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight:\u003cbr\u003e\n 70 lbs., 31.8 kg (shipping)\u003cbr\u003e\n 60 lbs., 27.3 kg (unit only)\n\n \n   \n\n\n \n \n","brand":"Krell","offers":[{"title":"Default Title","offer_id":57409460568396,"sku":"KRELLSOLO375XD","price":9165.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Solo-375-Power-Amplifier.jpg?v=1777486299"},{"product_id":"krell-solo-575-xd-575xd-mono-power-amplifier","title":"Krell Solo 575 XD (575XD)  Mono Power Amplifier","description":"Krell Solo 575XD\u003cbr\u003e\u003cbr\u003e\n\nMono Amplifiers\u003cbr\u003e\u003cbr\u003e\n   \nKrell's New XD Technology\u003cbr\u003e\nKrell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended Detail) upgrade for the iBias amplifiers takes an already great sounding amplifier and raises its performance to the next level. “XD” is a classic example of Krell’s continuous R \u0026amp; D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier we discovered substantial sonic improvements by lowering the output impedance belowtraditional norms. So we applied this technique to our existing line of amplifiers and the improvement was so substantial that it required a unique designation, hence, “XD.”\u003cbr\u003e\u003cbr\u003e\n\nIt was no simple matter to just lower the output impedance. This affects the amplifier’s stability and transientresponse so each stage prior to the output stage had to be re-tuned to work optimally with the lower outputimpedance. This lower output impedance exerts more control over the speaker drivers and damps out unwanted vibrational modes, allowing a more accurate reproduction of the original signal.\u003cbr\u003e\u003cbr\u003e\n\nKrell Class A iBias Technology\u003cbr\u003e\nKrell's history is rich with breakthrough Class A amplifiers that have helped build the Krell legacy of offering the best sounding amplifiers available. Audiophiles have always considered Class A technology to be the best sounding operating state for amplifiers. However, despite Class A's unrivaled sound quality, it has fallen out of fashion because of recent demands to reduce power consumption and heat in home electronics products. Krell engineering took this challenge and redefined the meaning of high performance power amplifier. Our goal - unmatched performance, elegant design, and a compelling array of features. The breakthrough - a patent pending circuit delivering Class A operation without the excessive heat and wasted energy of conventional designs,housed in a striking new form factor, with network connectivity for advanced access and monitoring. The sound is open and unconstrained, in a manner that rivals live performance and the true sound of voices and instruments. Music and dialogue are reproduced with a richness, detail, and startling dynamics that fill a room.\u003cbr\u003e\u003cbr\u003e\n\nPlainly stated, Class A designs are the most musically accurate circuit topology available. Class A amplifiers do not suffer from the inherent distortions that all Class AB amplifiers experience. In a traditional Class A design, the output transistors conduct full current at all times regardless of the actual demand from the speakers. Often, only a fraction of this power is needed to reproduce an audio signal at normal listening levels. The rest of the power is dissipated through the amplifier’s heatsinks, producing large amounts of wasted heat. With Krell's iBias™technology, bias is dynamically adjusted, so the output transistors receive exactly as much power - but only as much power - as they need.\u003cbr\u003e\u003cbr\u003e\n\nKrell's iBias Class A technology allows our latest amplifiers to run infull Class A mode to full power while minimizing heat generation. Previous efforts at using a \"tracking\" bias, while effective, only measured the incoming signal and set bias levels from this information. Their new patent pending iBias technology significantly elevates the effectiveness of previous designs by calculating bias from the output stage. This seemingly small change in topology results in a dramatic improvement in sound quality, especially midrange richness and purity.\u003cbr\u003e\u003cbr\u003e\n\nThe core of the technology is an innovative, patent pending design fora dynamic intelligent bias circuit. Our iBias Class A circuit directly measures the output current of the amplifier and adjusts the bias to the optimum level. Because iBias Class A measures the output current, the realtime demands of the specific speaker connected to the amp are directly incorporated into the circuit function. In addition, iBias Class A evenreduces the bias when the signal is at very low levels, making its operationundetectable by ear and even by standard amplifier measurements.\u003cbr\u003e\u003cbr\u003e\n\nIn sliding bias schemes, the circuit merely estimates how much bias isneeded based on the input signal and an \"assumed speaker load.\" Compared with iBias Class A, these sliding bias technologies are much less effective - and much less accurate.\u003cbr\u003e\u003cbr\u003e\n\nPower Supply Highlights\u003cbr\u003e\n Power supply technology has always been an important contributor to the Krell sound. The power supplies of our Krell iBias Class A amplifiers have been optimized for use with the iBias circuit. Depending on the model, up to four toroidal transformers feed amplifier modules that include the audio circuitry, rectifier, and power supply filtering mounted to an individual heat sink. This design shortens the electrical path from the power supply to the output transistors, reducing the overall impedance and allowing the circuit to respond faster and control the speakers even better and more accurately.\u003cbr\u003e\u003cbr\u003e\n\nUnlike traditional Class A amplifiers, iBias Class A amps have a compact design that allows rack-mounting, making them ideal for custom installation as well as traditional audiophile systems. This convenient form factor is made possible through thermostatically controlled ventilation fans. The fans used are specifically chosen for quiet operation, and operate at the speed required to maintain the ideal internal temperature. They run only during periods of peak energy demand - when the music is at its loudest - so they are inaudible in normal use. \u003cbr\u003e\u003cbr\u003e\n\nNetwork Connectivity\u003cbr\u003e\nThe new amplifiers include RJ 45 Ethernet connectivity and an internal web page that is accessible from any smartphone, tablet, or laptop. Network connectivity brings convenience, monitoring, and reporting to end users. Amplifier configuration options include display brightness and timeout. For energy conservation, the amplifiers can be programmed to power off at a preset time of inactivity. Individual channels can be muted and firmware updates can be initiated from the web server.\u003cbr\u003e\u003cbr\u003e\n\nOnce the amplifier is connected to a network router with Internet access, the amplifier's advanced protection systems are now viewable on an Internet-connected device. Excessive current, output DC, fan speeds, short circuit, and overheating are all monitored in real time. If an issue occurs, the fault is displayed on the front panel and reported on the web server interface. Emails will automatically be sent to as many as three email addresses to notify the end user and\/or the dealer of the condition.\u003cbr\u003e\u003cbr\u003e\n\nCircuitry Highlights\u003cbr\u003e\n The new iBias circuitry is built on a foundation of core Krell circuit technologies. All signal gain is realized in the current domain using proprietary multiple-output current mirrors with extraordinary open loop linearity. Each amplifier channel uses all discrete components. There are no generic integrated circuits or op amps used anywhere. Gain is distributed among several stages, allowing each to have a large linear operating area.\u003cbr\u003e\u003cbr\u003e\n\nAudio signal voltages are converted to current at the amplifier input, and the audio signal remains in the current domain throughout the entire amplifier. \u003cbr\u003e\u003cbr\u003e\n\nCurrent mirrors in the final gain stages use a new output power device that operates at a 73% higher voltage, delivers almost 10% more current, and offers 120 watts of additional power handling capability as compared to other devices.\u003cbr\u003e\u003cbr\u003e \n \nWith this combination, the iBias amplifiers may now deliver substantially more power while using a smaller footprint. Normally used in demanding, high-bandwidth video circuits, these transistors allow the design of gain stages with superb accuracy and very low distortion. The signal path is fully complementary and fully balanced from input to output. Independent complementary pre driver and driver stages for the positive and negative output transistors make the output stages extremely fast and linear. This unique circuit is impervious to low-impedance or reactive loads; it simply drives any loudspeaker with absolute confidence, achieving the very best possible sonic results.\u003cbr\u003e\u003cbr\u003e\n\nMost amplifiers use coupling capacitors in the signal path to block DC and prevent damaging offset voltages from reaching your speakers. Krell amplifiers are fully direct-coupled, with no capacitors in the audio signal path. This design gives the Krell amplifiers lower internal impedance, which allows firmer, more precise control of your speakers. It also provides flatter, more extended low-frequency response, because coupling capacitors not only block DC but also affect the lowest bass frequencies. Krell employs expensive, non intrusive DC servos that remove DC without impacting the musical signal. Thus, the iBias Class A amplifiers deliver the full breadth of the music with detail, impact, and space intact.\u003cbr\u003e\u003cbr\u003e\n\nKrell CAST™\u003cbr\u003e\n Reserved for the Solo 375 and Solo 575 is our CAST inputs and circuitry. Current Audio Signal Transmission, termed CAST, is a revolutionary method of connecting analog audio components for unparalleled sonic performance. In traditional audio systems, each component is a discrete entity with unique characteristics that act upon the musical signal independently. Each component is unaware of the other components in the system. The cables that connect the components also have their own electrical characteristics, which affect the sonic presentation of the entire system. Krell CAST™ unifies individual components and interconnects them into an electrically linked whole. The original signal remains unaltered from source to speaker. Still equipped with standard connections for use with other components, the full expression of Krell technology is realized when the system is connected using Krell CAST MMF interconnects. Krell CAST connected systems offer significant improvements in every performance area: speed, precision, dynamic range, depth and width of the sound stage, transient impact, and tonal balance.\u003cbr\u003e\u003cbr\u003e\n\nEverything Audiophiles and Home Theater Fans Could Want in an Amplifier\u003cbr\u003e\n Krell iBias Class A amplifiers are the first to deliver the rich musicality of Class A amplifiers, the uncompromised dynamics of classic Krell amplifiers, and the efficiency and low power consumption of Class G and H amplifiers.\u003cbr\u003e\u003cbr\u003e\n\nBecause the iBias circuit eliminates crossover distortion, the amplifier is able to resolve more of the detail and microdynamics in even the best analog recordings. Simply put, the music breathes. Whether an iBias amplifier is called on to reproduce the extreme dynamic range of high-resolution digital files, the minute intricacies of a 45-rpm, 180-gram vinyl record, or the complexity of today’s latest blockbuster action film, it does so without altering or abating the music in any way.\u003cbr\u003e\u003cbr\u003e\n\nThe iBias amplifiers' unprecedented ability to retrieve the subtlest details gives their sound an incredible dimensionality, with an ambient, broad and extraordinarily deep soundstage. As spacious as the sound is, though, the amplifiers are still able to produce pinpoint stereo imaging if the recording calls for it.\u003cbr\u003e\u003cbr\u003e\n\nIt's all the power and control for which Krell has always been famous, with a level of resolution and musicality in the midrange and treble that has simply never been heard before.\u003cbr\u003e\u003cbr\u003e\n\nIn short, the new patent pending iBias Class A Krell amplifers give today's audiophiles and home theater fans everything they could possibly want in an amplifier.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003e\u003cbr\u003e\n\nMono Power Amplifier:\u003cbr\u003e\n575 Watt Amplifier Featuring Krell iBias Technology \u003cbr\u003e\u003cbr\u003e\n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, –0.15 dB\u003cbr\u003e\n \u0026lt; 0.5 Hz to 100 kHz +0, –3 dB\u003cbr\u003e\u003cbr\u003e\n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 108 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 115 dB, \"A\"-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain:  27 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt;  0.19% at 20 kHz, at 575 W, 8 Ω \u003cbr\u003e\u003cbr\u003e\n\nInput Impedance:\u003cbr\u003e\n Single-ended: 100 kΩ \u003cbr\u003e\nBalanced: 200 kΩ\u003cbr\u003e\u003cbr\u003e \n\nInput sensitivity:\u003cbr\u003e\n Single-ended or balanced: 3.03 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput power:\u003cbr\u003e\n 575 W RMS at 8 Ω\u003cbr\u003e\n900 W RMS at 4 Ω\u003cbr\u003e\u003cbr\u003e\n\nOutput voltage:\u003cbr\u003e\n 192 V peak-to-peak\u003cbr\u003e\n 68 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput current:\u003cbr\u003e\n 22 A peak\u003cbr\u003e\u003cbr\u003e\n  \nSlew rate:\u003cbr\u003e\n 40 V\/μs \u003cbr\u003e\u003cbr\u003e\n\nOutput impedance:\u003cbr\u003e\n \u0026lt; 0.015Ω, 20 Hz to 20 kHz\u003cbr\u003e\u003cbr\u003e\n\nDamping factor:\u003cbr\u003e\n \u0026gt; 530, 20 Hz to 20 kHz, referred to 8 \u003cbr\u003e\u003cbr\u003e\n\nPower consumption:\u003cbr\u003e\n Standby: 1 W\u003cbr\u003e\n Idle: 131 W\u003cbr\u003e\n Maximum: 2660 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output:\u003cbr\u003e\n Standby: 3.42 BTU\/hr.\u003cbr\u003e\n Idle: 448 BTU\/hr.\u003cbr\u003e\n Maximum: 9097 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 1 single-ended via RCA connector\u003cbr\u003e\n 1 balanced via XLR connector\u003cbr\u003e\n 1 CAST\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 1 pairs binding posts\u003cbr\u003e\u003cbr\u003e\n\nDimensions:\u003cbr\u003e\n 17.1 in. W x 7.65 in. H x 21.10in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight:\u003cbr\u003e\n 80 lbs., 36.4 kg (shipping)\u003cbr\u003e\n 70 lbs., 31.8 kg (unit only)","brand":"Krell","offers":[{"title":"Default Title","offer_id":57409460601164,"sku":"KRELLSOLO575","price":11248.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Solo-575-Power-Amplifier.jpg?v=1777486304"},{"product_id":"krell-vanguard-universal-dac","title":"Krell Vanguard Universal DAC","description":"Playback of media files stored in PC (Windows XP\/7\/8), network storage, and DropBox and SkyDrive\/OneDrive cloud storage\u003cbr\u003e\u003cbr\u003e\n  \nStream media files from a mobile device over the network to DLNA compatible audio components and smart TVs\u003cbr\u003e\u003cbr\u003e\n\nFull search capability, playlist creation and editing.\u003cbr\u003e\u003cbr\u003e\n\nThe Vanguard Universal DAC is the first standalone DAC from Krell in over 20 years and it reignites the Krell digital legacy incorporating the latest in digital connectivity and technology.\u003cbr\u003ev\n\n The digital input suite includes USB, coaxial and optical digital inputs, 2 HDMI inputs and output, Ethernet music streaming controlled through dedicated iOS and Android apps; and aptX Bluetooth wireless for convenient streaming from phones, tablets and computers.\u003cbr\u003e\u003cbr\u003e\n\n Digital to Analog conversion is performed by the 32 bit ESS9018 DAC and feeds a classic Krell balanced, fully discrete Class A circuit which is also used in the Krell top of the line Cipher SACD\/Cd player.  Krell Current Mode technology is employed to assure unequaled signal bandwidth, enough to easily handle the latest high-resolution PCM and DSD audio sources without impacting high-frequency response and detail.\u003cbr\u003e\u003cbr\u003e\n\n Coaxial and HDMI inputs support PCM up to 24-bit\/192kHz. Optical input supports up to 24-bit\/96kHz\u003cbr\u003e\u003cbr\u003e\n\n 2 HDMI 2.0 inputs support DSD and 4K video content. \u003cbr\u003e\u003cbr\u003e\n\n HDMI output includes Audio Return Channel for use with smart TV streaming services such as Netflix, Vudu, and Pandora.\u003cbr\u003e\u003cbr\u003e\n\n USB and Network streaming support MP3, AAC, WMA, WAV(PCM), FLAC, ALAC up to 24b\/192kHz\u003cbr\u003e\u003cbr\u003e\n\n Bluetooth streaming features aptX® technology.  A Bluetooth connection is a data pipeline between devices. Because the pipeline has a maximum width, it is difficult to flow large audio files through it.  aptX solves the problem of sending audio wirelessly over Bluetooth by reducing the size of the audio files so they can be squeezed through the wireless pipeline without affecting sound quality.\u003cbr\u003e\u003cbr\u003e\n\n iOS and Android apps for control and music management include:\n\n Playlist management across servers: Manage music playlists of music files stored on any server device on the network.","brand":"Krell","offers":[{"title":"Default Title","offer_id":57412690280780,"sku":"KRELLVANGUARDUNIVDAC","price":4415.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Vanguard-DAC.jpg?v=1777536107"},{"product_id":"krell-duo-125-xd-125xd-power-amplifier","title":"Krell Duo 125 XD (125XD) Power Amplifier","description":"Duo 125 XD - 2 Channel Power Amplifier\u003cbr\u003e\n125 Watt Amplifier Featuring Krell iBias Technology \u003cbr\u003e\u003cbr\u003e\n\nKrell's New XD Technology\u003cbr\u003e\nKrell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended Detail) upgrade for the iBias amplifiers takes analready great sounding amplifier and raises its performance to the next level. “XD” is a classic example of Krell’scontinuous R \u0026amp; D efforts reaping benefits across multiple product lines. During the development of the K-300iIntegrated Amplifier we discovered substantial sonic improvements by lowering the output impedance belowtraditional norms. So we applied this technique to our existing line of amplifiers and the improvement was sosubstantial that it required a unique designation, hence, “XD.”\u003cbr\u003e\u003cbr\u003e\n\nIt was no simple matter to just lower the output impedance. This affects the amplifier’s stability and transientresponse so each stage prior to the output stage had to be re-tuned to work optimally with the lower outputimpedance. This lower output impedance exerts more control over the speaker drivers and damps out unwantedvibrational modes, allowing a more accurate reproduction of the original signal.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003e\u003cbr\u003e\n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, -0.08 dB\u003cbr\u003e\n 0.5 Hz to 100 kHz +0, -3 dB\u003cbr\u003e\u003cbr\u003e\n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 95 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 112 dB, \"A\"-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain:\u003cbr\u003e \n 25.8 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt; 0.03% at 1 kHz, at 125 W, 8 Ω \u003cbr\u003e\n \u0026lt; 0.17% at 20 kHz, at 125 W, 8 Ω \u003cbr\u003e\u003cbr\u003e\n\nInput Impedance:\u003cbr\u003e\n Single-ended: 100 kΩ \u003cbr\u003e\nBalanced: 200 kΩ \u003cbr\u003e\u003cbr\u003e\n\nInput sensitivity:\u003cbr\u003e\n Single-ended or balanced: 1.63 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput power:\u003cbr\u003e\n 125 W RMS at 8 Ω\u003cbr\u003e\n250 W RMS at 4 Ω\u003cbr\u003e\u003cbr\u003e\n\nOutput voltage:\u003cbr\u003e\n 89.4 V peak-to-peak\u003cbr\u003e\n 31.6 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput current:\u003cbr\u003e\n 18 A peak\u003cbr\u003e\u003cbr\u003e\n  \nSlew rate:\u003cbr\u003e\n 40 V\/μs \u003cbr\u003e\u003cbr\u003e\n\nOutput impedance:\u003cbr\u003e\n \u0026lt; 0.015Ω, 20 Hz to 20 kHz\u003cbr\u003e\u003cbr\u003e\n\nDamping factor:\u003cbr\u003e \n \u0026gt; 530, 20 Hz to 20 kHz, referred to 8 Ω\u003cbr\u003e\u003cbr\u003e\n\nPower consumption:\u003cbr\u003e\n Standby: 1 W\u003cbr\u003e\n Idle: 58 W\u003cbr\u003e\n Maximum: 1350 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output:\u003cbr\u003e\n Standby: 3.42 BTU\/hr.\u003cbr\u003e\n Idle: 198 BTU\/hr.\u003cbr\u003e\n Maximum: 4617 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 2 single-ended via RCA connector\u003cbr\u003e\n 2 balanced via XLR connector\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 2 pairs binding posts\u003cbr\u003e\u003cbr\u003e\n\nDimensions:\u003cbr\u003e\n 17.1 in. W x 7.65 in. H x 21.10in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight:\u003cbr\u003e\n 60 lbs., 27.3 kg (shipping)\u003cbr\u003e\n 50 lbs., 22.7 kg (unit only)\n \n \n\n\n\n\n\n\n\n","brand":"Krell","offers":[{"title":"Default Title","offer_id":57412700733772,"sku":"KRELLDUO125XD","price":5498.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Duo-125-XD.jpg?v=1777536143"},{"product_id":"krell-theatre-7xd-multichannel-class-a-amplifier","title":"Krell Theatre 7XD Multichannel Class A Amplifier","description":"THEATER 7 XD - 7 Channel Power Amplifier\u003cbr\u003e\u003cbr\u003e\n100 Watt Amplifier Featuring Krell iBias Technology\u003cbr\u003e\u003cbr\u003e \n\nThe amplifier design uses Krell Current Mode technology that is fully differential and discrete in the critical gain stages. This results in a highly linear and extended frequency response, well beyond the range of hearing, for smooth effortless highs and tight high impact bass.\u003cbr\u003e\u003cbr\u003e\n\nThe power supply consists of two 787VA toroidal transformers and 160,000uF of capacitance. This is shared among all the channels so all of that power is available to the channels with the most demand.\u003cbr\u003e\u003cbr\u003e\n\nIn real world conditions the left, right, and center channels require the lion’s share of the power so this gives the Theater 7 a more effective power supply than other amplifiers that have smaller dedicated power supplies for each channel.\u003cbr\u003e\u003cbr\u003e\n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, –0.11 dB\u003cbr\u003e\n \u0026lt; 3 Hz to 200 kHz +0, –3 dB\u003cbr\u003e\u003cbr\u003e\n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 101 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 114 dB, “A”-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain: 25.5 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt; 0.02% at 1 kHz, at 100 W, 8 Ω, two channels driven;\u003cbr\u003e \n \u0026lt; 0.20% at 20 kHz, at 100 W, 8 Ω, two channels driven; \u003cbr\u003e\u003cbr\u003e\n\nInput impedance:\u003cbr\u003e\n Single-ended: 27 kΩ; \u003cbr\u003e\nBalanced: 54 kΩ; \u003cbr\u003e\u003cbr\u003e\n\nInput sensitivity: Single-ended or balanced: 1.50 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput power, per channel:\u003cbr\u003e\n 120W RMS at 8 Ω, 2 channels driven\u003cbr\u003e\n 115W RMS at 8 Ω, 3 channels driven\u003cbr\u003e\n 110W RMS at 8 Ω, 5 channels driven\u003cbr\u003e\n 105W RMS at 8 Ω, 7 channels driven\u003cbr\u003e\n 210W RMS at 4 Ω, 2 channels driven\u003cbr\u003e\n 190W RMS at 4 Ω, 3 channels driven\u003cbr\u003e\n 165W RMS at 4 Ω, 5 channels driven\u003cbr\u003e\n 140W RMS at 4 Ω, 7 channels driven\u003cbr\u003e\u003cbr\u003e\n\nOutput voltage:\u003cbr\u003e\n 93 V peak-to-peak\u003cbr\u003e\n 33 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput current:  10 A peak\u003cbr\u003e\n\nOutput impedance:  \u0026lt; 0.025 Ω, 20 Hz to 20 kHz\u003cbr\u003e\n\nDamping factor:  \u0026gt; 320, 20 Hz to 20 kHz, referred to 8 Ω\u003cbr\u003e\u003cbr\u003e\n\nPower consumption:\u003cbr\u003e\n Standby: 1 W\u003cbr\u003e\nIdle: 66 W\u003cbr\u003e\n Maximum: 2000 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output:\u003cbr\u003e\n Standby: 3.42 BTU\/hr.\u003cbr\u003e\n Idle: 225 BTU\/hr.\u003cbr\u003e\n Maximum: 2200 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 7 single-ended via RCA connector\u003cbr\u003e\n 7 balanced via XLR connector\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 7 pairs five-way binding posts\u003cbr\u003e\u003cbr\u003e\n\nRemote connectors:\u003cbr\u003e\n One 12 VDC input (12 V trigger) via 3.5 mm jack \u003cbr\u003e\u003cbr\u003e\n\nDimensions:\u003cbr\u003e \n 17.1 in. W x 7.65 in. H x 21.10 in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536 mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight: \u003cbr\u003e\n 80 lbs., 36.4 kg (shipping)\u003cbr\u003e\n 70 lbs., 31.8 kg (unit only)\n\n \n \n\n \n \n","brand":"Krell","offers":[{"title":"Default Title","offer_id":57414734905676,"sku":"KRELLTHEATRE7XD","price":7916.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Theatre-7.jpg?v=1777550906"},{"product_id":"krell-k-300i-k300i-integrated-amplifier","title":"Krell K-300i (K300i) Integrated Amplifier","description":"Amplifier legend Krell Industries has announced its new K-300i Integrated amplifier which boasts newly developed amplifier circuit with Krell iBias that can deliver 150w @ 8ohms and 300w @ 4 ohms.  IBias provides the sonic benefit of Class A operation without the excessive heat and power consumption of traditional class A designs.\u003cbr\u003e\u003cbr\u003e\n\nThe K-300i also boasts a 770VA Transformer and 80,000 uF capacitance for excellent signal control and dynamics.  Krell Current Mode to[topology is used with fully differential circuitry that runs from the input stage through to the last output gain stage proving and extremely linear and extended frequency response curve with smooth, effortless highs and extremely dynamic bass energy.\u003cbr\u003e\u003cbr\u003e\n\nThere are two versions available the \"Classic\" and the \"Digital\" the latter comes with a world class DAC featuring support for the latest digital music formats.  An ESS Sabre Pro DAC configured for high current output performs the digital to analogue conversion for un compromised audio reproduction.  A network streaming audio renderer with dedicated mobile App plays AAC, ALAC, AIFF, FLAC, WAV and WMA Files with DoP files supported to 192kHz\/24Bit from UPnP music servers or Nas devices.\u003cbr\u003e\u003cbr\u003e\n\nWith the \"Digital\" option the Krell is both MQA and Roon Ready along with Spotify, Tidal, Deezer, Qobuz and vTuner Radio streaming services being supported\u003cbr\u003e\u003cbr\u003e\n  \nThere are HDMI inputs and outputs supporting 4K UHD and HDR to allow audiophile grade sound quality integration into Home Cinema systems.  A single USB port is available on the front panel with other USB ports on the rear for user friendly option to stream music from any computer and there is also a Bluetooth Receiver with aptX Technology\u003cbr\u003e\u003cbr\u003e\n\nThe K-300i has an internal web server that is optimized for tablets and provides a remote graphical user interface for convenient and intuitve control\u003cbr\u003e\u003cbr\u003e\n\n​\n\nKey features:-\u003cbr\u003e\n •When it comes to high-end solid-state amps, no manufacturer is more revered or influential than Connecticut-based Krell\u003cbr\u003e\n•The K-300i is the latest in a long line of class-leading integrated amps – the simplest and most affordable way to own a Krell amplifier\u003cbr\u003e\n•Newly developed amp circuit incorporates the latest version of Krell’s iBias technology\u003cbr\u003e\n•iBias delivers the sonic purity of Class A operation without the excessive heat and power consumption of traditional Class A designs\u003cbr\u003e\n•Krell Current Mode topology, with fully differential circuitry from input to output, ensures an extremely linear and extended frequency response\u003cbr\u003e\n•770VA transformer lies at the heart of the amp’s prodigious power supply, enabling precise, unerring signal control and effortless dynamic range\u003cbr\u003e\n•Power output rated at 150W per channel into 8 ohms, doubling to 300W per channel into 4 ohms\u003cbr\u003e\n•Two versions available: a classic version with purely analogue inputs (RCA\/XLR) and a fully featured ‘digital’ version that adds digital inputs and streaming\u003cbr\u003e\u003cbr\u003e\n\nAdditional features – ‘digital’ version\u003cbr\u003e\n•Integrated high-end DAC section utilises ESS Sabre Pro chipset\u003cbr\u003e\n•Includes UPnP network streaming and aptX Bluetooth reception, as well as optical, coaxial, USB and HDMI digital inputs and an HDMI output\u003cbr\u003e\n•Supports a wide range of file formats and streaming platforms, including Spotify Connect, Tidal, Deezer, Qobuz and vTuner\u003cbr\u003e\n•Also decodes MQA files and is Roon Ready\u003cbr\u003e\n•Dedicated control app for Android\/iOS devices\u003cbr\u003e\u003cbr\u003e\n \n\nThe Krell K-300i is availablein black or silver finish.\n","brand":"Krell","offers":[{"title":"Silver","offer_id":57414738018636,"sku":"KRELLK300I-S","price":6665.0,"currency_code":"GBP","in_stock":true},{"title":"Black","offer_id":57423780905292,"sku":"KRELLK300I-B","price":6665.0,"currency_code":"GBP","in_stock":true},{"title":"Krell K300i (K300i) Integrated Amplifier (Digital) - Silver","offer_id":57423780938060,"sku":"KRELLK300IDIG-S","price":7498.33,"currency_code":"GBP","in_stock":true},{"title":"Krell K300i (K300i) Integrated Amplifier (Digital) - Black","offer_id":57423780970828,"sku":"KRELLK300IDIG-B","price":7498.33,"currency_code":"GBP","in_stock":true},{"title":"Krell K300i (K300i) Digital Module","offer_id":57423781003596,"sku":"KRELLK300IDIGMOD","price":1083.33,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-K-300i-Silver.jpg?v=1777550915"},{"product_id":"krell-duo-300-xd-300xd-power-amplifier","title":"Krell Duo 300 XD (300XD) Power Amplifier","description":"Krell Duo 300 XD\u003cbr\u003e\u003cbr\u003e\n   \nKrell's New XD Technology\u003cbr\u003e\nKrell’s “XD” (Xtended Dynamics, Xtended Dimensionality, Xtended Detail) upgrade for the iBias amplifiers takes an already great sounding amplifier and raises its performance to the next level. “XD” is a classic example of Krell’s continuous R \u0026amp; D efforts reaping benefits across multiple product lines. During the development of the K-300i Integrated Amplifier we discovered substantial sonic improvements by lowering the output impedance below traditional norms. So we applied this technique to our existing line of amplifiers and the improvement was so substantial that it required a unique designation, hence, “XD.” \u003cbr\u003e\u003cbr\u003e\n\nIt was no simple matter to just lower the output impedance. This affects the amplifier’s stability and transient response so each stage prior to the output stage had to be re-tuned to work optimally with the lower output impedance. This lower output impedance exerts more control over the speaker drivers and damps out unwanted vibrational modes, allowing a more accurate reproduction of the original signal.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003e\u003cbr\u003e \n\nFrequency response:\u003cbr\u003e\n 20 Hz to 20 kHz +0, -0.13 dB\u003cbr\u003e\n 0.5 Hz to 100 kHz +0, -3 dB\u003cbr\u003e\u003cbr\u003e\n\nSignal-to-noise ratio:\u003cbr\u003e\n \u0026gt; 98 dB, wideband, unweighted, referred to full power output\u003cbr\u003e\n \u0026gt; 116 dB, \"A\"-weighted\u003cbr\u003e\u003cbr\u003e\n\nGain:  26.2 dB\u003cbr\u003e\u003cbr\u003e\n\nTotal harmonic distortion:\u003cbr\u003e\n \u0026lt; 0.045% at 1 kHz, at 400 W, 8 Ω \u003cbr\u003e\n \u0026lt; 0.17% at 20 kHz, at 400 W, 8 Ω \u003cbr\u003e\u003cbr\u003e\n\nInput Impedance:\u003cbr\u003e\n Single-ended: 100 kΩ \u003cbr\u003e\nBalanced: 200 kΩ \u003cbr\u003e\u003cbr\u003e\n\nInput sensitivity:\u003cbr\u003e\n Single-ended or balanced: 2.4 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput power:\u003cbr\u003e\n 300 W RMS at 8 Ω\u003cbr\u003e\n540 W RMS at 4 Ω\u003cbr\u003e\u003cbr\u003e\n\nOutput voltage:\u003cbr\u003e\n 138 V peak-to-peak\u003cbr\u003e\n 49 V RMS\u003cbr\u003e\u003cbr\u003e\n\nOutput current:\u003cbr\u003e\n 16 A peak\u003cbr\u003e\u003cbr\u003e\n  \nSlew rate:\u003cbr\u003e\n 40 V\/μs \u003cbr\u003e\u003cbr\u003e\n\nOutput impedance:\u003cbr\u003e\n \u0026lt; 0.007Ω, 20 Hz to 20 kHz\u003cbr\u003e\u003cbr\u003e\n\nDamping factor:\u003cbr\u003e\n \u0026gt; 1140, 20 Hz to 20 kHz, referred to 8 Ω\u003cbr\u003e\u003cbr\u003e\n\nPower consumption:\u003cbr\u003e\n Standby: 4 W\u003cbr\u003e\n Idle: 180 W\u003cbr\u003e\n Maximum: 1600 W\u003cbr\u003e\u003cbr\u003e\n\nHeat output:\u003cbr\u003e\n Standby: 13.7 BTU\/hr.\u003cbr\u003e\n Idle: 615 BTU\/hr.\u003cbr\u003e\n Maximum: 5677 BTU\/hr.\u003cbr\u003e\u003cbr\u003e\n\nInputs:\u003cbr\u003e\n 2 single-ended via RCA connector\u003cbr\u003e\n 2 balanced via XLR connector\u003cbr\u003e\u003cbr\u003e\n\nOutputs:\u003cbr\u003e\n 2 pairs binding posts\u003cbr\u003e\u003cbr\u003e\n\nDimensions:\u003cbr\u003e\n 17.1 in. W x 7.65 in. H x 21.10in. D\u003cbr\u003e\n 434 mm W x 194 mm H x 536mm D\u003cbr\u003e\u003cbr\u003e\n\nWeight:\u003cbr\u003e\n 80 lbs., 3.64 kg (shipping)\u003cbr\u003e\n 70 lbs., 31.8 kg (unit only)\n \n \n","brand":"Krell","offers":[{"title":"Default Title","offer_id":57415231766860,"sku":"KRELLDUO300XD","price":9998.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Krell-Duo-300XD-front.jpg?v=1777554919"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/collections\/krell.jpg?v=1777392712","url":"https:\/\/www.stoneaudio.co.uk\/collections\/krell.oembed","provider":"Stone Audio","version":"1.0","type":"link"}