{"title":"Sugden","description":"Manufacturers of the classic A21a Series 2 Integrated Class A amplifier. Arguably one of, if not the greatest sounding integrated below £3000!  Sugden products embody over four decades of experience in audio engineering to give the ultimate satisfaction in musical performance. Designed and manufactured in West Yorkshire, England, by a loyal, dedicated and skilled workforce. A workforce that takes pride in the presentation of its skills and the performance of their products.\u003cbr\u003e\u003cbr\u003e\nAll of Sugdens products are developed to reproduce music (whatever its genre) as near to the original performance as possible. Replay, complete with all the nuances, harmonics and emotions which allow the listener to enjoy and be involved in an art form that has captivated civilisations for centuries.\u003cbr\u003eSugden is a special company that develops a long term relationship with its customers through the musical performance and the long life of its products. Welcome to the Sugden world of ‘simply more music’","products":[{"product_id":"sugden-masterclass-la-4-la4-line-pre-amplifier","title":"Sugden Masterclass LA-4 (LA4) Line Pre-Amplifier","description":"The Sugden Masterclass series of Audio equipment embodies years of experience in designing and building audio reproduction equipment. The series embraces the highest level of today's technological possibilities to obtain the ultimate level of musical performance. Technological possibilities, which include circuit topography, discreet components, and material utilisation to extend the art of music reproduction beyond the scientific to an actual soul form. The special character of the series is the result of extended periods of subjective listening and tuning of the amplifying elements to achieve the ultimate audible results.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFacilities:\u003c\/b\u003e\u003cbr\u003eStereo Inputs: One XLR Balanced, Four RCA Line Level, Two RCA Line Level Tape\u003cbr\u003eStereo Outputs: One XLR Balanced, Two RCA Pre-Amp Outputs, Two RCA Tape Outputs\u003cbr\u003e\u003cbr\u003eThe Masterclass Pre-amplifier is a state-of-the-art audio design incorporating many important features and facilities. Each Masterclass is individually handcrafted by a single team member and is your guarantee of a product of the highest quality. The electronic circuitry of the Masterclass Pre-amplifier has been developed to offer the best possible sonic performance without compromise. Attention to detail such as gold plated circuit board, silver soldered components and precision gold plated relay switching, place the Masterclass in a class of its own!\u003cbr\u003e\u003cbr\u003eFurther improvements in sound quality are realised with the addition of a balanced input and output. This professional standard now allows the domestic audio enthusiast to enjoy the same high standards as the recording engineer and musician alike.","brand":"Sugden","offers":[{"title":"Sugden Masterclass LA-4 Line Pre-Amplifier - Titanium","offer_id":57406040703308,"sku":"SMCLASSPRE","price":3666.67,"currency_code":"GBP","in_stock":true},{"title":"Sugden Masterclass LA-4 Line Pre-Amplifier - Graphite","offer_id":57415753859404,"sku":"SUGDENLA4G","price":3666.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/sugden_la-4.jpg?v=1777452622"},{"product_id":"sugden-masterclass-spa-4-spa4-stereo-power-amplifier","title":"Sugden Masterclass SPA-4 (SPA4) Stereo Power Amplifier","description":"The Sugden Masterclass series of Audio equipment embodies years of experience in designing and building audio reproduction equipment. The series embraces the highest level of today's technological possibilities to obtain the ultimate level of musical performance. Technological possibilities, which include circuit topography, discreet components, and material utilisation to extend the art of music reproduction beyond the scientific to an actual soul form. The special character of the series is the result of extended periods of subjective listening and tuning of the amplifying elements to achieve the ultimate audible results.\u003cbr\u003e\u003cbr\u003e\nThe SPA-4 is a stereo version of the MPA-4 and uses the same class A circuit. The only differences are power output and the additional flexibility of both single ended and balanced inputs. Not every music lover can accommodate two substantial power amplifiers in their listening space, so a single SPA-4 could be the solution. One of the noticeable abilities of the SPA-4 is how well it works with smaller loudspeaker designs as well as large ones. Control and soundstage are two key elements of the SPA-4 making it a fine power amplifier.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\n\n\u003ch3\u003eSPA-4 Specifications\u003c\/h3\u003e\n\nInputs: ​                                    Stereo line level, stereo balanced\u003cbr\u003e\n\nOutputs:                                  Stereo pair multi-way locking binding posts\u003cbr\u003e\n\n \nInput Sensitivity:                      1Volt for full output\u003cbr\u003e\n\nPower Output:                         75 Watts into 4 Ohms both channels working\u003cbr\u003e\n\nFrequency Response:             +\/-0dB 15Hz-30kHz\u003cbr\u003e\n\nBandwidth:                             -3dB points 2Hz-200kHz\u003cbr\u003e\n\nSignal to Noise:                       \u0026gt;85dB\u003cbr\u003e\n\nGross Weight  (packed):         25kgs\u003cbr\u003e\n\nDimensions:                           250 x 430 x 350mm (hwd)","brand":"Sugden","offers":[{"title":"Sugden Masterclass SPA-4 Stereo Power Amplifier - Titanium","offer_id":57406040736076,"sku":"SMCLASSPWR","price":5303.33,"currency_code":"GBP","in_stock":true},{"title":"Sugden Masterclass SPA-4 Stereo Power Amplifier - Graphite","offer_id":57415754056012,"sku":"SUGDENSPA4G","price":5303.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/sugden_spa-4_mpa-4.jpg?v=1777452626"},{"product_id":"sugden-a21se-signature-integrated-amplifier","title":"Sugden A21SE Signature Integrated Amplifier","description":"\n\nA21SE Signature Integrated Amplfier\u003cbr\u003e\u003cbr\u003e\n\nThe special edition A21SE integrated amplifier builds on the strengths of the classic A21. Offering pure class A single ended operation, the sound remains distinctively ‘Sugden’. Upgraded with a fifty percent larger power supply and increased power output, dynamics are even more impressive. A sophisticated pre-amplifier stage is another improvement on the A21. This provides greater clarity without added brightness producing crystal clear highs. The larger power supply provides greater control over a wider range of loudspeakers and improved micro dynamics for low level listening.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specification:- \u003cbr\u003e\n\nFacilities:\u003cbr\u003e\n\nInputs:  Five line level operated by relays  \u003cbr\u003e                                 \n\nOutputs: One pre-out (variable), one tape out  \u003cbr\u003e                                                                                    \n\nVolume control:One pair of stereo multi-way binding posts Remote control (RC5 handset included)  \u003cbr\u003e\u003cbr\u003e  \n                                    \nSpecifications: \u003cbr\u003e            \n\nLine Input sensitivity: 110mV @ zero attenuation for full output\u003cbr\u003e                \n\nPower output: 30 Watts into 8 Ohms both channels working 40 Watts into 4 Ohms both channels working\u003cbr\u003e\n                                                                       \n\nFrequency response: +\/-1dB 12Hz-141kHz \u003cbr\u003e              \n\nBandwidth:6Hz-280kHz \u003cbr\u003e                              \n\nSignal to noise: More than 90dB  \u003cbr\u003e                      \n\nPacked weight: 15Kg \u003cbr\u003e                        \n\nDimensions: 115 x 430 x 360mm                             \n\n \n\n \n\n","brand":"Sugden","offers":[{"title":"Titanium","offer_id":57407056970060,"sku":"SUGDENA21SESIG","price":3331.67,"currency_code":"GBP","in_stock":true},{"title":"Graphite","offer_id":57415860191564,"sku":"SUGDENA21SESIG-G","price":3331.67,"currency_code":"GBP","in_stock":true},{"title":"Sugden A21SE Stage Two Phono Amplifier","offer_id":57415860519244,"sku":"SUGDENSTAGETWO","price":716.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Sugden-A21SE-image-1.jpg?v=1777454752"},{"product_id":"sugden-masterclass-ia-4-integrated-amplifier","title":"Sugden Masterclass IA-4 Integrated Amplifier","description":"Masterclass IA-4 Integrated Amplifier\u003cbr\u003e\nThe IA-4 is Sugdens flagship and most popular integrated amplifier. Weighing a substantial 20 kilos the IA-4 has a purposeful look and impressive build quality. Plenty of input and output facilities are on offer including a high quality phono stage. The class A power output circuit has been upgraded from the A21 series with a larger power supply and improved smoothing and output capacitors. Gold plated circuit boards, full relay switching and a precision input selector switch offer further detailing. The pre-amplifier section of the IA-4 is a bespoke design, with surprising clarity and detail.  The most noticeable feature is the ability to create a large performance with depth and height on any type of music.\u003cbr\u003e\u003cbr\u003e\n\n​Facilities:\u003cbr\u003e\nInputs ​                                  Three line level, tape, MM phono, balanced\u003cbr\u003e\nOutputs                                Variable pre-out, fixed out, loudspeaker out\u003cbr\u003e\nVolume Control                    Remote control RC5 compatible\u003cbr\u003e\nTape                                     Monitor and record off\u003cbr\u003e\u003cbr\u003e\n​Specifications:\u003cbr\u003e\nLine Input sensitivity            125mV\u003cbr\u003e\nPhono Input Sensitivity        2mV (MM)\u003cbr\u003e\nPower Output                       33 Watts per channel\u003cbr\u003e\nFrequency Response           +\/-1dB 14Hz-200kHz\u003cbr\u003e\nBandwidth                            6Hz-300kHz\u003cbr\u003e\nSignal to Noise                     \u0026gt;84dB\u003cbr\u003e\nGross Weight  (packed)        20kgs\u003cbr\u003e\nDimensions                         165 x 430 x 440mm (hwd)","brand":"Sugden","offers":[{"title":"Titanium","offer_id":57407155536204,"sku":"SMCLASSINT","price":5558.33,"currency_code":"GBP","in_stock":true},{"title":"Graphite","offer_id":57415868219724,"sku":"SUGDENMIA4G","price":5558.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/smasterclassint.jpg?v=1777454990"},{"product_id":"sugden-masterclass-pa-4-pa4-phono-amplifier","title":"Sugden Masterclass PA-4 (PA4) Phono Amplifier","description":"An amplifier of the most extreme sensitivity with separate moving coil and moving magnet\/RIAA gain stages. Facilities include two moving coil stereo input pairs, with variable impedance loading and a single pair of moving magnet inputs. These facilities are selected through precision relays operated via front fascia mounted switches. Designed with a tremendously high headroom they can accomodate cartridges of the most extreme output characteristics.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eSPECIFICATION\u003cbr\u003eInput Two stereo moving coil inputs 470R x 22nf\u003cbr\u003eTwo x stereo pairs load, adjustment phono sockets\u003cbr\u003eOne moving magnet stereo input facility \u003cbr\u003e\u003cbr\u003eOutputs Two pair stereo phono output sockets \u003cbr\u003eOutput 10 volts (max)\u003cbr\u003eInput Sensitivity mc. 0.125mV for 125mV output\u003cbr\u003emm 2.5mV for 125mV output \u003cbr\u003eFrequency Response 10Hz to 30kHz +\/- 0.1dB\u003cbr\u003eStereo Separation -70dB","brand":"Sugden","offers":[{"title":"Titanium","offer_id":57407234933068,"sku":"SUGDENMCLASSPHONO","price":2117.5,"currency_code":"GBP","in_stock":true},{"title":"Graphite","offer_id":57415917568332,"sku":"SUGDENPA4G","price":2117.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/sugden_pa-4.jpg?v=1777455736"},{"product_id":"sugden-a21-signature-amplifier","title":"Sugden A21 Signature Amplifier","description":"A21 Signature Line and Integrated Amplifier\u003cbr\u003e\u003cbr\u003e\n\nThe Sugden pure class A design provides affordable high-end performance from a beautifully engineered single box integrated amplifier.  Compact in size with a simple but stylish design, the A21 is possibly the only amplifier you will ever need. With many of the original A21’s still in daily use after fifty years, it could also last a life time. Providing a large soundstage and depth to all types of music, the A21 is an amplifier you can listen to for hours without fatigue.  The single ended circuit provides impressive dynamics and incredible bass.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specification:-\u003cbr\u003e\n\nFacilities:\u003cbr\u003e\n\nInputs: Five line level (four on A21 Integrated) optional mm\/mc phono\u003cbr\u003e\n                                     \n                                             \nOutputs: Pre-out (variable), tape out (fixed) One pair of stereo multi-way binding posts\u003cbr\u003e\n                                  \n\nRemote control: Volume up\/down. Earth terminal \u003cbr\u003e\u003cbr\u003e\n                      \n                                            \nSpecifications: \u003cbr\u003e             \n\nLine Input sensitivity: 170mV for max. out \u003cbr\u003e              \n\nPhono input sensitivity:  3mV\/mm, 0.2mV\/mc for max. output \u003cbr\u003e        \n\nPhono Loading:  MM 47K MC 100 Ohm   \u003cbr\u003e                   \n\nPower output: 23 Watts into 8 Ohms \u003cbr\u003e                        \n\nFrequency response:  +\/-1dB 10Hz-20kHz  \u003cbr\u003e           \n\nBandwidth: 6Hz-200kHz \u003cbr\u003e                         \n\nSignal to noise: More than 83dB \u003cbr\u003e                      \n\nGross weight  (packed):  11 Kgs        \n\u003cbr\u003e\nDimensions:  92 x 430 x 350mm      \n\n","brand":"Sugden","offers":[{"title":"Sugden A21L Signature Line Amplifier - Titanium","offer_id":57407629918540,"sku":"SUGDENA21AS2T","price":2428.33,"currency_code":"GBP","in_stock":true},{"title":"Sugden A21L Signature Line Amplifier - Graphite","offer_id":57416453620044,"sku":"SUGDENA21AS2G","price":2428.33,"currency_code":"GBP","in_stock":true},{"title":"Sugden A21I Signature Integrated Amplifier - Titanium","offer_id":57416453652812,"sku":"SUGDENA21AS2IT","price":2498.33,"currency_code":"GBP","in_stock":true},{"title":"Sugden A21I Signature Integrated Amplifier - Graphite","offer_id":57416453685580,"sku":"SUGDENA21AS2IG","price":2498.33,"currency_code":"GBP","in_stock":true},{"title":"Sugden A21 Phono Board (Pre-Installed in A21I)","offer_id":57416453783884,"sku":"SUGDENA21aS2P","price":165.0,"currency_code":"GBP","in_stock":true},{"title":"Sugden A21L Signature Line Amplifier - Custom Finish","offer_id":57416453816652,"sku":"SUGDENA21LS","price":2570.0,"currency_code":"GBP","in_stock":true},{"title":"Sugden A21I Signature Integrated Amplifier - Custom Finish","offer_id":57416453849420,"sku":"SUGDENA21IS","price":2640.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Sugden-A21-Signature.jpg?v=1777459267"},{"product_id":"sugden-masterclass-ha-4-ha4-headphone-amplifier","title":"Sugden Masterclass HA-4 (HA4) Headphone Amplifier","description":"SUGDEN AUDIO are pleased to introduce their Masterclass Series dedicated Headphone Amplifier the HA-4. This very special Class A amplifier has been developed to extend the boundaries of 'near field listening' to a level of musical performance that istruly amazing.\u003cbr\u003e\u003cbr\u003eThe HA-4 has the ability to recreate all types of music in dynamic, detailed, transparent and harmonic performance, with every nuance retained. Euphonic performance which will enthuse and encourage the listener to enjoy Simply More Music.\u003cbr\u003e\u003cbr\u003eDesigned and manufactured in Sugdens, West Yorkshire factory where the in-house skills are dedicated to musical performance, aesthetic design, pride of presentation and absolute customer satisfaction.\u003cbr\u003e\u003cbr\u003eThe HA-4 is housed in a most attractive composite metal case of Aluminium and Steel, with Anodised and Powder Coated surfaces that exude quality. The HA-4 is equipped with: two inputs, two outputs, and a manual volume control. It has its own built in power supply and Euro plug mains power connector.\u003cbr\u003e\u003cbr\u003eThe two inputs are: Balanced Mode and Asymmetric Phono (RCASingle ended], both inputs being Stereo Pairs. Selection of either input is via a logic relay circuit operated by a front panel push button switch. Thetwo outputs are: A front panel mounted 6.3Smm headphone Jack Socketand a Stereo pair of RCAphono plugs on the rear panel. The Stereo Jack Socket is of the switched type. disconnecting the rear output when the headphone jack is inserted.\u003cbr\u003e\u003cbr\u003eThe volume control, located in the centre of the front panel, has infinitely fine control for maximum user friendliness, even for the most sensitive of ears.\u003cbr\u003e\u003cbr\u003eThe Electronic circuitry is a variant of Sugdens 'VCV' PreAmplifier. coupled to a Pure Class A. Zero Feedback. Mosfet output stage. The circuitry has been enhanced by a Discrete Constant Voltage Series Power supply driven by a custom built single wound and shielded 43VA torroidal transformer.\u003cbr\u003e\u003cbr\u003eThe 'VCV' circuit consists of a high input impedance voltage to current converter. variable current source and a current to voltage conversion stage. This configuration ensures absolute minimum loss of input information due to the high impedance. perfect current gain. without attenuation problems. and matched sound structure irrespective of output. The final current to voltage conversion stage is based on current feedback in line with the other stages previously mentioned. The Pure Class A. Zero Feedback. Mosfet Output Stage is both very fast and unconditionally stable.\u003cbr\u003e\u003cbr\u003eWhilst the circuit concept and application are technically superb the final balance of musical performance is obtained by the use of quality components. Gold plated circuit boards silver soldered with components which are selected for their. sonic qualities. stability in performance and often many years of Sugden testing. application and listening.\u003cbr\u003e\u003cbr\u003eThis is another Sugden product of ingenuity and integrity subjectively mastered to allow its user to enjoy many years of superior musical performance.","brand":"Sugden","offers":[{"title":"Titanium","offer_id":57408690094412,"sku":"SUGDENHA4","price":1437.5,"currency_code":"GBP","in_stock":true},{"title":"Graphite","offer_id":57418550870348,"sku":"SUGDENHA4G","price":1437.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/sugden_ha4.jpg?v=1777470907"},{"product_id":"sugden-sapphire-fba-800-fba800-stereo-power-amplifier","title":"Sugden Sapphire FBA-800 (FBA800) Stereo Power Amplifier","description":"\u003cp\u003eThe FBA 800 is a, Floating Bridge Power Amplifier operating in Pure Class A output mode... \u003c\/p\u003e\n\u003cp\u003ePower output is set at 40 watts \/ channel, the unit’s torroidal transformer is rated at 350. The Amplifier has the input facilities of: Balanced Input or Phono\/asymmetric input, (both stereo pairs) Output is through a Stereo pair of Speaker Binding\u003cbr\u003ePosts.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSelected optional facilities are:\u003cbr\u003e\u003cbr\u003eInput sensitivity: \u003cbr\u003eThis can be reduced in one step by -6dB. This allows the user to adjust the balance\/ matching of the Audio, chain, i.e. PreAmp – Power Amp,- Loudspeakers. The sensitivity is selected by Push Button, located on the front Panel.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBalanced or Phono\/RCA input:\u003cbr\u003eIs also exercised by a Push Button on the front Panel.\u003cbr\u003eThe FBA 800 Power Amplifier is a Stereo, Class A amplifier operating in the Bridged Mode with the Output earth Floating. Each channel consists of two amplifiers working as voltage amplifiers driving an output stage of Bridged Power transistors. The advantages are a low noise floor, better power output relative to the voltage rails (x2) and with the fixed current of the Class A mode, low output impedance and better load tolerance. The Amplifier has been designed for modern high efficiency loudspeakers.\u003cbr\u003eThe Power amplifier is D.C. coupled, with a servo lock, ensuring excellent low frequency detail. For safety purposes the amplifier includes a d.c. protection circuit. This circuit is statically switched using extremely low impedance Mosfet switching devices. This circuit also soft switches the Power Amp On and Off\u003cbr\u003eThe power supply is a low impedance design with a single custom made bi-filar wound transformer, with four separate windings, The main smoothing capacitors for the output stage are specially developed for professional audio applications with excellent ripple characteristics and long life. The Four power transistors per channel in the output stages are multi emitter devices with an output capability of 26 amps per device, .giving a tone burst potential of …….watts.\u003cbr\u003eIn the balanced mode the FBA800 operates in the full balanced mode from the input of the unit to the output. This is accomplished by using the two amplifiers per channel in the balanced mode. \u003c\/p\u003e\n\u003cp\u003eFor people who want to experience all the emotions of music this Amplifier is set completely in\u003cbr\u003eClass A. No compromise has been taken with the build quality of its electronic circuitry, electronic\u003cbr\u003ecomponents, or case work. It includes gold plated circuit boards, and high quality internal silver wiring all designed to give long life and the ultimate musical performance. \u003cbr\u003eIt is always exciting when a new project reaches the performance stage and the FBA 800 amplifier through its development has continued to astound and excite through thousands of hours of tuning and development. The finished product is a precious link to simply more music.\u003c\/p\u003e","brand":"Sugden","offers":[{"title":"Sugden Sapphire FBA-800 - Titanium","offer_id":57409327038796,"sku":"SUGDENSAPPHIREFBA800T","price":6747.5,"currency_code":"GBP","in_stock":true},{"title":"Sugden Sapphire FBA-800 - Graphite","offer_id":57420030705996,"sku":"SUGDENSAPPHIREFBA800G","price":6747.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/sugden-sapphire-fba-800.jpg?v=1777482806"},{"product_id":"sugden-sapphire-dap-800-dap800-digital-analogue-pre-amplifier","title":"Sugden Sapphire DAP-800 (DAP800) Digital Analogue Pre Amplifier","description":"\u003cp\u003eSugden Audio is pleased to introduce the new Sapphire DAP-800 High End Digital Pre-Amplifier \u0026amp; DAC which will further enhance the Company’s standing and reputation amongst discerning music lovers.\u003c\/p\u003e\n\u003cp\u003eSugden’s main objective in developing the DAP-800 has been musical performance coupled to a practical user interface, pride of possession and product longevity.\u003c\/p\u003e\n\u003cp\u003eThe market trends for new and fashionable technologies have not been ignored and the DAP-800 has been developed to complement and present the user with the very best euphonic experience.\u003c\/p\u003e\n\u003cp\u003eAs with all Sugden Products they are designed and manufactured by Sugden in its West Yorkshire, England premises. The use of through hole as opposed to surface mount components, where possible, enhances product life, performance and reliability.\u003c\/p\u003e\n\u003cp\u003eThe DAP-800 is an Analogue pre-amplifier with a separate in built DAC facility. It has:-\u003c\/p\u003e\n\u003cp\u003eAnalog Inputs:\u003cbr\u003eOne pair of Balanced Inputs.\u003cbr\u003eFour Pair of Phono\/RCA Inputs.\u003cbr\u003eOne Pair of By-Pass Inputs Phono\/RCA.\u003c\/p\u003e\n\u003cp\u003eDigital Inputs:\u003cbr\u003eOne x USB type B.\u003cbr\u003eTwo x Toslink Optical S\/PDIF.\u003cbr\u003eThree x Coaxial S\/PDIF.\u003c\/p\u003e\n\u003cp\u003eAnalog Outputs:\u003cbr\u003eOne pair of XLR Balanced Outputs.\u003cbr\u003eOne pair of Phono\/RCA Tape outputs.\u003cbr\u003eTwo pair of Phono\/RCA outputs.\u003c\/p\u003e\n\u003cp\u003eThe individual sections of the pre-amplifier i.e. Analogue and Digital are self contained stages having their own Power Supplies voltage regulation and circuit board assemblies The analogue stage has a 50 watt toroidal transformer and the digital stage a 15 watt E core transformer. The digital facility power supplies are totally isolated from the analogue stage.\u003c\/p\u003e\n\u003cp\u003eThe Pre Amplifiers analogue stage incorporates a Sugden VCV circuit in its most developed advanced form. This circuit has a high impedance input section, current gain stage (without attenuation problems) which drives a folded cascode stage into a Class ‘A’ output stage. The folded cascode circuit facilitates a wide bandwidth with maximum dynamics and low capacitive connectivity.\u003c\/p\u003e\n\u003cp\u003eThe tonal balance is irrespective of the output level and the sense of headroom, imaging and soundstage is to be believed.\u003c\/p\u003e\n\u003cp\u003eThe DAC facility to interface with digital products includes inputs for USB, Optical and coaxial S\/PDIF signals. The actual DAC is a non-oversampling, digital filtering- less, DAC where the digital interface transceiver is a Wolfson Micro electronics device. The DAC also includes Post Conversion Filtering in the analogue output stage. The USB signal received is converted via a circuit including a Texas Instruments Universal IC whose SPDIF output signal is re-clocked and de jittered by the Wolfson interface transceiver.\u003c\/p\u003e\n\u003cp\u003eThis DAC configuration has been adopted for Sugdens Digital Processing after many many hours of actual auditioning of a wide sample of DSPs. The auditory perception\/Musical performance in terms of dynamic balance, tonal balance, voice and emotion, are so much more satisfying and Sugden’s preference.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFacilities:\u003c\/p\u003e\n\u003cp\u003eAnalogue inputs – Four line level inputs, one balanced input \u0026amp; bypass.\u003c\/p\u003e\n\u003cp\u003eDigital inputs – Three S\/PDIF coax, two S\/PDIF optical \u0026amp; one USB type B Word length up to 24bit 96k.\u003c\/p\u003e\n\u003cp\u003eOutputs – Two line level outputs, one balanced output, \u0026amp; tape output.\u003c\/p\u003e\n\u003cp\u003eVolume control – Motorised remote control (analogue) RC5 compatible.\u003c\/p\u003e\n\u003cp\u003eMains power switching – Separate for analogue and digital circuits.\u003c\/p\u003e\n\u003cp\u003eTechnical Specifications:\u003c\/p\u003e\n\u003cp\u003eInput sensitivity – 120mV for 1 Volt out.\u003c\/p\u003e\n\u003cp\u003eMaximum output – 9 Volts.\u003c\/p\u003e\n\u003cp\u003eFrequency response – 0dB 15Hz – 98kHz. 3dB 8Hz – 125khz.\u003c\/p\u003e\n\u003cp\u003eSignal to noise – \u0026gt; 85dB.\u003c\/p\u003e\n\u003cp\u003eDistortion – \u0026lt; 0.05% @ 1kHz, 1Volt out.\u003c\/p\u003e\n\u003cp\u003eNett Weight – 10 kgs.\u003c\/p\u003e\n\u003cp\u003eDimensions – 120 x 430 x 340mm (hwd).\u003c\/p\u003e","brand":"Sugden","offers":[{"title":"Sugden Sapphire DAP-800 Pre Amplifier - Titanium","offer_id":57409327530316,"sku":"SUGDENSAPHIREDAP800-T","price":4442.5,"currency_code":"GBP","in_stock":true},{"title":"Sugden Sapphire DAP-800 Pre Amplifier - Graphite","offer_id":57420033294668,"sku":"SUGDENSAPHIREDAP800-GRA","price":4442.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/sugden-dap-800.jpg?v=1777482867"},{"product_id":"sugden-masterclass-dac-4-dac4-24-96-converter","title":"Sugden Masterclass DAC-4 (DAC4) 24\/96 Converter","description":"Masterclass DAC-4 Digital to Analogue Converter\u003cbr\u003e\u003cbr\u003e\n\nThe DAC-4 offers a well judged alternative to the plethora of other DAC’s available in the current market.  With sound quality top of the list, our watchword ‘Rescuing music from technology’ could not be more appropriate.  Instead of accepting and using the latest digital trends, we have produced a product meticulously engineered to play music. With our own conversion circuits and data reformatting, a near analogue experience can be enjoyed. The DAC-4 is without limitations and has no over sampling or digital filtering.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specification:-\u003cbr\u003e\nFacilities:\u003cbr\u003e\n\nOutputs - One RCA stereo analogue, One digital coaxial \u003cbr\u003e                                      \nInput - Three SPDIF coaxial, two SPDOF optical\u003cbr\u003e                                       \nFront panel controls - One USB type B, Mains IEC socket Power switch, power lamp, input selector switch, digital lock lamp.\u003cbr\u003e\u003cbr\u003e \n               \nOutput: 2.15Volts\u003cbr\u003e\nFrequency response: 20Hz - 20kHz +\/-1.50dB points  \u003cbr\u003e               \nSignal to noise: \u0026gt; 80dB \u003cbr\u003e                   \nGross Weight: 5 Kg \u003cbr\u003e  \nDimensions  90 x 250 x 330  \u003cbr\u003e                       \nDigital input: SPDIF 16-24 bit word length, with sample rates from 32 to 96kHz  \u003cbr\u003e                           \nPower consumption: 12 Watts                \n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n                                   \n\n \n\n\n","brand":"Sugden","offers":[{"title":"Sugden Masterclass DAC-4 - Titanium","offer_id":57413146804556,"sku":"SUGDENMASTERCLASSDAC-4-T","price":1844.17,"currency_code":"GBP","in_stock":true},{"title":"Sugden Masterclass DAC-4 - Graphite","offer_id":57422882341196,"sku":"SUGDENMASTERCLASSDAC-4-GR","price":1844.17,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Sugden-Masterclass-DAC-4-Titanium.jpg?v=1777539562"},{"product_id":"stemfoort-sf-200-sf200-power-amplifier","title":"Stemfoort SF-200 (SF200) Power Amplifier","description":"Stemfoort SF-200 Passive Line Amplifier\u003cbr\u003e\u003cbr\u003e\n\nThe power amplifier is a wide bandwidth design reaching frequency extremes of 6Hz – 120kHz. This allows your music to retain all the low level detail and nuances that create the authentic atmosphere of a recording. This wide bandwidth capability provides excellent dynamic performance for high resolution music streaming such as 24\/192, DSD and SACD formats.\u003cbr\u003e\u003cbr\u003e\n\nWith hi-res music formats available, it is important to have an amplifier capable of handling a greater dynamic range. The SF-200 uses a large power supply providing impressive tone bursts and 100 Watts per channel output. Plenty of current is on tap, resulting in greater control of loudspeakers and powerful deep bass when required.\u003cbr\u003e\u003cbr\u003e\n\nThe SF-200 has a number of hidden features providing a high level of design sophistication.\u003cbr\u003e\u003cbr\u003e\n\nAll inputs are relay switched keeping the signal path as short as possible. A motorised analogue volume control is operated by a supplied remote control or can be manually turned. This is a high quality component to ensure the least possible signal degradation.\u003cbr\u003e\u003cbr\u003e\n\nThe amplifier output stage has a fast acting protection circuit just in case a wrong connection has been made or there is a disruption to the mains supply.  A unique feature of the SF-200 is its ability to remain operational even if the mains voltage drops 30%. This feature is the result of developing a very stable and robust power supply and amplifier circuit.\n\u003cbr\u003e\u003cbr\u003e\n \n\nMilitary specification signal wiring has been used to eliminate interference from power supplies, whilst the custom designed transformer sits inside a steel sub assembly to reduce noise and vibration. Quality components are used throughout, chosen for reliability and performance, low inductance resistors replace standard components in critical areas of the signal path.\u003cbr\u003e\u003cbr\u003e\n\nTop grade materials are used throughout the SF-200’s body work. The front panel is a solid 10mm thick pre-milled aluminium plate, a high grade material normally used for medical instruments, aerospace and robotic systems. Other case materials are steel or aluminium that have either been anodised, galvanised or powder coated to protect the finish and maintain appearance during many years of use. All fine finishing is carried out at our own factory to ensure complete quality control.\u003cbr\u003e\u003cbr\u003e\n\nThe Stemfoort SF-200 is designed and manufactured in Britain by J E Sugden \u0026amp; Co Limited. Each amplifier is handmade by a single highly skilled technician with many years experience. All circuit boards are hand soldered and we do not use any surface mount components that can degrade sound quality. A rigorous and continuous test procedure is carried out during construction. This includes power amplifier module pre-test, sub assembly test, built chassis test and final bench and specification test.\u003cbr\u003e\u003cbr\u003e\n\nTechnical Specifications:-\u003cbr\u003e\u003cbr\u003e\n\nFront panel controls; \u003cbr\u003e\n•Input Selector Switch\u003cbr\u003e\n•Motorised volume control\u003cbr\u003e\n•Power on push switch\u003cbr\u003e\n•Circuit ready indicator\u003cbr\u003e\n•Remote control sensor\u003cbr\u003e\n•Solid aluminium knobs with machined indicator\u003cbr\u003e\u003cbr\u003e\n\nRear panel connections;\u003cbr\u003e\n•Mains power inlet socket with accessible fuse tray.\u003cbr\u003e\n•Two pairs of gold plated threeway loudspeaker binding posts.\u003cbr\u003e\n•Five stereo gold plated RCA (phono type) inputs.\u003cbr\u003e\u003cbr\u003e\n\nPower output: 100 Watts per channel both channels working\u003cbr\u003e\nNoise Level: \u0026gt; 85dB\u003cbr\u003e\nWeight: 16 kgs\u003cbr\u003e\nSize: 115 x 430 x 360 mm\n\n\n \n\n \n\n\n\n\n \n\n\n\n \n\n\n\n","brand":"Sugden","offers":[{"title":"Default Title","offer_id":57413627576652,"sku":"STEMFOORTSF200","price":2266.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Stemfoort-SF-200.jpg?v=1777545088"},{"product_id":"sugden-masterclass-anv-50-anv50-integrated-amplifier","title":"Sugden Masterclass ANV-50 (ANV50) Integrated Amplifier","description":"It is a unique design with many innovative features and specially developed audio circuits.\u003cbr\u003e\u003cbr\u003e\n\nIn 1967 Sugden released the world’s first solid state pure class A amplifier, the A21.  The ANV-50 promises to revisit this golden age of British audio engineering, with a design focused on the demands and preferences of today’s audio enthusiast and music lover.\u003cbr\u003e\u003cbr\u003e\n\n​The ANV-50 has at its heart, the purest class A amplifier Sugden Audio has ever produced and this is coupled to an advanced ‘ideal’ final output stage.  This unique two stage amplification system guarantees our signature pure class A sound, with the ability to drive most loudspeaker systems.\u003cbr\u003e\u003cbr\u003e\n\nThe sophisticated final output stage features a comparator and correction circuit so that errors which could occur in the power output section due to varying loads and distortion, are corrected to match the output of the high impedance input amplifier.  Whilst maintaining the signal authenticity, it also increases the load stability and forces the output impedance to zero.  This special output stage with Sugden Error Correction has extremely low open loop output impedance with a resultant high damping factor at quite high frequencies. It also benefits from overall Current-Feedback.\u003cbr\u003e\u003cbr\u003e\n\nThe power amplifier and pre-amplifier are fully DC coupled so there are no capacitors in the signal path to interfere with or deteriorate the sound quality. One of the key features of Sugden Class A amplifiers is the power supply.  Because they have a high standing current and power reserves, the output is always ready to act instantly to any signal.  This is unlike a conventional Class AB amplifier that waits to receive power through a transformer and a bridge rectifier.  The ANV-50 takes this one step further by using a 1 MHz switching power supply which acts instantly to deliver the power as the Pure Class A amplifier section is always on.\u003cbr\u003e\u003cbr\u003e\n\nThe power supplies are high current, fast and incredibly stable.  With a MTBF (Mean Time Before Failure) of 100 years they are designed for longevity and reliability.\u003cbr\u003e\u003cbr\u003e\n\nAs the ANV-50 is an integrated amplifier it has an internal pre-amplifier, developed specifically for this amplifier.  The circuit is a line drive design and uses the minimum number of components, all of which are high quality.  This provides a very open and natural sound and demonstrates that when carefully engineered, less can be more.\u003cbr\u003e\u003cbr\u003e\n\nWhen the ANV-50 does not receive an input signal it has a very low power consumption of only 20 Watts, making it extremely efficient.  As the heatsinks are mounted internally with minimum contact to the outer case it only runs slightly warm to the touch. \u003cbr\u003e\u003cbr\u003e \n\nFacilities:-\u003cbr\u003e\nInputs:  Five line level operated by relays\u003cbr\u003e\nOutputs: One pre-out (variable), one tape out. One pair of stereo multi-way binding posts\u003cbr\u003e\nVolume Control:     Remote control (RC5 handset included)\u003cbr\u003e\u003cbr\u003e\n\nSpecifications:-\u003cbr\u003e\n\nLine Input Sensitivity: 110mV @ zero attenuation for full output\u003cbr\u003e\nPower Output: 50 Watts into 8 Ohms both channels working. 100 Watts into 4 Ohms both channels working\u003cbr\u003e\nFrequency Response:  +\/-1dB 12Hz-45kHz\u003cbr\u003e\nBandwidth:  8Hz-86kHz\u003cbr\u003e\nSignal to Noise: \u0026gt; 85dB\u003cbr\u003e\nGross Weight  (packed): 10kgs\u003cbr\u003e\nDimensions:  143 x 430 x 370mm (hwd)","brand":"Sugden","offers":[{"title":"Titanium","offer_id":57414577652044,"sku":"SUGDENMASTERANV-50","price":3995.0,"currency_code":"GBP","in_stock":true},{"title":"Graphite","offer_id":57423611068748,"sku":"SUGDENMASTERANV-50G","price":3995.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Sugden-ANV-50.jpg?v=1777549564"},{"product_id":"sugden-masterclass-mpa-4-mpa4-balanced-power-amplifiers","title":"Sugden Masterclass MPA-4 (MPA4) Balanced Power Amplifiers","description":"The popularity of the Masterclass series has resulted in over seventeen years of continuous production. Offering an excellent price\/performance ratio it is easy to see why it remains so successful. With an abundance of headroom, the MPA-4 mono power amplifiers deal easily with heavy complex music, allowing the low level detail to be heard clearly and accurately. Boasting a fully balanced circuit design, it can be the engine room of a fully balanced hi fi system.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\n\n\u003ch3\u003eMPA-4 Specifications\u003c\/h3\u003e\nInputs: ​                                    Mono balanced\u003cbr\u003e\nOutputs:                                  Single pair multi-way locking binding posts\u003cbr\u003e\nInput Sensitivity:                      1Volt for full output\u003cbr\u003e\nPower output:                         165 Watts into 8 Ohms both channels working\u003cbr\u003e\nFrequency response:             +\/-0dB 15Hz-30kHz\u003cbr\u003e\nBandwidth:                              -3dB points 2Hz-200kHz\u003cbr\u003e\nSignal to noise:                      \u0026gt;85dB\u003cbr\u003e\nGross weight  (packed):         25kgs x 2\u003cbr\u003e\nDimensions:                           250 x 430 x 360mm (hwd)","brand":"Sugden","offers":[{"title":"Sugden Masterclass MPA-4 (MPA4) Power Amplifiers (pair) - Titanium","offer_id":57415678918988,"sku":"SUGDENMPA4TIT","price":10606.67,"currency_code":"GBP","in_stock":true},{"title":"Sugden Masterclass MPA-4 (MPA4) Power Amplifiers (pair) - Graphite","offer_id":57423971975500,"sku":"SUGDENMPA4G","price":10606.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Sugden-Masterclass-MPA-4-graphite.jpg?v=1777557178"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/collections\/sugden.jpg?v=1777392474","url":"https:\/\/www.stoneaudio.co.uk\/collections\/sugden.oembed","provider":"Stone Audio","version":"1.0","type":"link"}