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Power Amplifiers


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The power amplifier is the final component in the signal chain before the loudspeakers. It is the workhorse of a hi-fi system. It takes the low-level signal from the pre-amplifier and converts it to a powerful signal to drive the loudspeakers. It has a low-level input to receive the signal from the preamplifier, and terminals for connecting loudspeaker cables.

Because of the power amplifier's unique function, it differs from other components in size, weight and use. High-quality power amplifiers are usually large and heavy. Moreover, the power amplifier is the component you don't need to touch and adjust. Consequently, power amplifiers are often placed on the floor near the loudspeakers rather than in an equipment rack.

STEREO POWER AMPLIFIER:
A power amplifier with two audio channels (left and right) in one chassis.

MONOBLOCK POWER AMPLIFIER:
A power amplifier with only one audio channel per chassis. Two monoblocks are required for stereo reproduction.

Page 1†† ( Displaying 10 of 194 Products )
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PS Audio Stellar S300 Power Amplifier
PS Audio Stellar S300 Power Amplifier
PS Audio Stellar S300 Stereo Power Amplifier

300 watt dual mono Analogue Cell power ampliifer

Breathe new life into your loudspeakers with the Stellar S300, one of the most extraordinary under $5,000 stereo power amplifiers ever crafted. The S300 combines the slam, linearity, and toe-tapping pacing of a Class D output stage with the warmth, grace, and rich inner detail of Stellar’s Class A Analog Cell. The results are nothing short of ground breaking. Liberate a wealth of untapped energy trapped in your media library. Plumb music’s subterranean depths and finally hear the bass your speakers were capable of. Revel in rich layers of fine, full detail. Marvel at the deep, extraordinary, wall-to-wall soundstage. Effortless. Lush. Stellar.


Availability Retail (inc. 20% VAT)
£ 1,500.00
£ 1,500.00
Quantity / Units:
Dan DAgostino Progression Stereo Power Amplifier
Dan DAgostino Progression Stereo Power Amplifier
Progression Stereo Amplifier

The Progression Stereo Amplifier extends the Progression family with a potent stereo amplifier. Leveraging our innovative Super Rail circuitry, first unveiled in the Progression Mono, the Progression Stereo amplifier exploits this unique technology delivering remarkable control and fidelity to any connected loudspeaker.

Every amplifier employs a voltage rail, actually two, a positive one and its companion negative partner. Voltage rails support the delivery of power to the speaker. The music signal swings between these two rails but due to natural loss, the musical signal never reaches the output rails’ full capability. Our Super Rail overcomes this limitation. Borrowing the idea of a turbo in a car engine, the Super Rail employs higher voltage rails in the sections prior to the output stage. This voltage "boost" allows the musical signal to exploit the full capability of the output voltage rails. Extending the musical signal swing closer to the output rails maximizes the performance of the output circuitry design itself. The result is improved dynamics, lower distortion, and a fierce grip of the speaker.


Please call to arrange demonstration
Please call to arrange demonstration
Constellation Audio Performance Series - Centaur II 500 Stereo
Constellation Audio Performance Series - Centaur II 500 Stereo
Centaur II 500 Stereo

Centaur II 500 is an unexpected but very happy result of our upgrade from the original Centaur to Centaur II. When they designed the upgrade, our “dream team” of the world’s finest audio engineers ended up with an amplifier they knew could deliver far more than its rated power, if only the power transformer could provide enough voltage. As an experiment, they installed one of the transformers from our Reference Series Hercules II into a Centaur II Stereo chassis. The experiment worked even better than they imagined, producing Centaur II 500: a stereo amplifier with the same power rating as two Centaur II monoblocks.


Please call to arrange demonstration
Constellation Audio Revelation Series - Taurus Mono Power Amplifier
Constellation Audio Revelation Series - Taurus Mono Power Amplifier
Taurus mono

High power from a more compact chassis
Two massive toroidal power transformers
250 watts per channel into 8 ohms, 500 into 4 ohms
Classic Constellation Balanced Bridged amplifier circuitry
Line Stage Gain Module with Direct mode for superior fidelity

A smaller chassis.
Taurus is something a little different for Constellation. In building their power amplifiers, they tended to focus purely on performance. But after their “dream team” of the world’s top audio engineers created the relatively compact Inspiration Stereo 1.0, they realized they could use some of the same construction techniques to create an exceptionally powerful amplifier in a chassis considerably smaller than that of their Performance Series Centaur III amplifier. And now - Taurus, an amplifier that stands only 8.5 inches high but delivers 250 watts per channel into 8 ohms, and comfortably doubles that number into 4 ohms.


Please call to arrange demonstration
Constellation Audio Revelation Series - Taurus Stereo Power Amplifier
Constellation Audio Revelation Series - Taurus Stereo Power Amplifier
Taurus stereo

High power from a more compact chassis
Two massive toroidal power transformers
250 watts per channel into 8 ohms, 500 into 4 ohms
Classic Constellation Balanced Bridged amplifier circuitry
Line Stage Gain Module with Direct mode for superior fidelity

A smaller chassis.
Taurus is something a little different for Constellation. In building their power amplifiers, they tended to focus purely on performance. But after their “dream team” of the world’s top audio engineers created the relatively compact Inspiration Stereo 1.0, they realized they could use some of the same construction techniques to create an exceptionally powerful amplifier in a chassis considerably smaller than that of our Performance Series Centaur III amplifier. And now - Taurus, an amplifier that stands only 8.5 inches high but delivers 250 watts per channel into 8 ohms, and comfortably doubles that number into 4 ohms.


Please call to arrange demonstration
Audio Research VT80 Foundation Series Power Amplifier
Audio Research VT80 Foundation Series Power Amplifier
VT80

Foundation Series Power Amplifier

The new VT80 is the much-anticipated amplifier that finally allows the Foundation series to be shown as a complete system. Combining an enticing new esthetic with worry-free operation and great audio performance, the VT80 is a vacuum-tube amplifier that will open doors to a new customer base.

At the heart of the VT80 are two important new features that have never been offered before by Audio Research. The first is a proprietary auto-bias circuit developed entirely in-house by our engineering department. Simply drop in the tubes and the VT80 will adjust bias for each output tube. The circuit automatically adjusts for tube wear or fluctuations in the power in real time. It will also work for different types of output tubes, including 6550, KT88, KT90, KT120 or KT150. The adjustment range is wide, but matched tubes from Audio Research still provide the highest performance. Finally, an auto-bias circuit that works in real time and does not compromise performance!


£ 7,998.00 *
£ 7,998.00 *
* Only available for purchase in-store
Stemfoort SF-200 (SF200) Power Amplifier
Stemfoort SF-200 (SF200) Power Amplifier
Stemfoort SF-200 Passive Line Amplifier

The 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.

With


£ 2,455.00 *
* Only available for purchase in-store
Niles SI-2150 (SI2150) Power Amplifier
Niles SI-2150 (SI2150) Power Amplifier
SI-2150 150W 2-Channel Power Amplifier (550W Bridged)

•Digital, high current bridgeable stereo amplifier
•150 watts RMS per channel into 8 Ohms (all channels driven)
•270 watts RMS per channel into 4 Ohms (all channels driven)
•Channels are bridgeable to 550 watts RMS into 8 Ohms
•Auto switching 110V-230V power supply
•Three turn-on modes: music sense, voltage trigger, and manual
•Voltage trigger input accepts 3-30VAC/DC


Availability Retail (inc. 20% VAT)
£ 910.00
Quantity / Units:
Niles SI-2100 (SI2100) Power Amplifier
Niles SI-2100 (SI2100) Power Amplifier
SI-2100 - 100W Two-Channel Power Amplifier (400W Bridged)

•Digital, high current bridgeable stereo amplifier
•100 watts RMS per channel into 8 Ohms (all channels driven)
•220 watts RMS per channel into 4 Ohms (all channels driven)
•Channels are bridgeable to 400 watts RMS into 8 Ohms
•Auto switching 110V-230V power supply
•Three turn-on modes: music sense, voltage trigger, and manual
•Voltage trigger input accepts 3-30VAC/DC


Availability Retail (inc. 20% VAT)
£ 700.00
Quantity / Units:
Niles SI-250 (SI250) Power Amplifier
Niles SI-250 (SI250) Power Amplifier
SI-250

50W Two-Channel Power Amplifer (225W Bridged)

•50 watts RMS per channel into 8 Ohms (all channels driven)
•100 watts RMS per channel into 4 Ohms (all channels driven)
•Channels are bridgeable to 225 watts RMS into 8 Ohms
•Channels are bridgeable to 225 watts RMS into 8 Ohms
•Three turn-on modes: music sense, voltage trigger, and manual
•Voltage trigger input accepts 3-30VAC/DC
•Audio circuitry constructed with the finest parts available, including 1% metal film resistors, high quality capacitors and oversized heat sinks for clear and uncolored sound


Availability Retail (inc. 20% VAT)
£ 530.00
Quantity / Units:
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