Audio Products

The Reference 80S stereo amplifier continues Audio Research’s latest design effort in creating a vacuum-tube amplifier that not only redefines ultimate music reproduction, but does it in an incredibly beautiful package.  Outwardly, the 80S shares the same dimensions as the 160M. A single shallow whisper fan is built into the bottom plate. Flexibility is built-in, too, with XLR an...[more]

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The Argo employs the best of Constellation Audio’s revolutionary audio technology. It starts with the Line Stage Gain Module circuitry used in the Altair II and Virgo II preamps, which uses hand-selected field-effect transistors (FETs) and servo circuits to achieve an essentially perfect balance between the positive and negative halves of the audio signal.The amplifier section features th...[more]

Building on the successful introduction of the Centaur II stereo and mono amplifiers last year, and benefitting from the research and development used to create the Reference Series Hercules II amplifiers, this new amplifier satisfies the demand for a more powerful Performance Series amplifier. Products of the Constellation Audio “dream team,” the Centaur II 500 Stereo delivers outs...[more]

Building on the successful introduction of the Centaur II stereo and mono amplifiers last year, and benefitting from the research and development used to create the Reference Series Hercules II amplifiers, this new amplifier satisfies the demand for a more powerful Performance Series amplifier. Products of the Constellation Audio “dream team,” the Centaur II 500 Stereo delivers outs...[more]

The Citadel is a monaural power amplifier offering all the advantages of the knowledge, the research and dedication that Team theta brought to the Dreadnaught-and then some. Citadel has been created to power the most demanding two channel musical reproduction systems, as well as delivering abundant power to home theater systems, to effortlessly recreate the vast spectran of sound tracks....[more]

The Classic 2 is the most cost-effective way to experience the incomparable sound quality of Dan D'Agostino Master Audio Systems. Its core technologies are heavily based on the design of D'Agostino's acclaimed Momentum amplifiers. The sound combines the immense power and current needed to drive even the most exotic speakers with a subtle, sweet musicality normally associated with much smaller a...[more]

Classic 3 The Classic 3 brings the acclaimed sound of Dan D'Agostino Master Audio Systems amplifiers to home theaters and advanced 2.1-channel stereo systems. Borrowing heavily from the amplification circuits D'Agostino developed for the Momentum amplifiers, the three-channel Classic 3 is a perfect companion to the Classic 2 when outfitting a 5 or 7 channel configuration of main speakers i...[more]

The CSA100 integrated amplifier is a part of the latest work by Copland, aiming to combine the advantages of tubes and transistor amplification using the synectic design concept that previously has made Copland hybrid amplifiers widely acclaimed. CSA100_front1 One tube is responsible for the CSA100 line amplification and the efficiency of this single tube layout is astonishing. The doub...[more]

Contrary to its bigger brothers, CSA100/CSA150 the CSA70 does not employ tubes in the line stage. The CSA70 preamplifier section is a solid stage architecture with a vanishingly low distortion. The CSA70 boasts the same power amplifier technology as the CSA100/CSA150 with a feedback structure inherently faster than conventional amplifiers and a wide large-signal frequency response. The...[more]

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The CTA407 will automatically adjust for any tube in the 6550/KT88/KT120/KT150 family. The CTA407 servo system is not only a lossless automatization of the bias adjustment – it is an integrated part of the CTA407 internal high pass filtering, closely matched to the transfer function of the amplifying circuitry and a vast improvement to the overall fidelity of the amplifier. The CTA407...[more]

The CTA405-A is an integrated valve amplifier with five line-level inputs, including a tape monitor loop, and a built-in RIAA phono circuit accommodating moving magnet and high output moving coil cartridges. The original CTA405 was launched nearly a decade ago and ever since, it has been an object of desire for audiophiles all around the world. The amplifier is now available in two version...[more]

Copland CTA408 Integrated Amplifier There is nothing like an excellent tube amplifier. An amplifier that simultaneously offer a midrange that is open and clear, highs with an unconstrained mobility and acceleration, and a deep, tight and free flowing bass reproduction. The CTA408 Integrated Amplifier is intended for those who prefer the ease of a single chassis amplification, still wanti...[more]

For more than half a century, these classic valves have been the foundation of numerous of high quality amplifiers and surely, they will continue to serve as one of the premium choices among manufactures of high-power valve amplifiers. However, nowadays KT120 is the most powerful dedicated audio tube in production. In comparison with the KT88, nearly 30% more power can be drawn from these impre...[more]

darTZeel is proud to introduce the new CTH-8550 full featured integrated amplifier. This new product combines in one casing most of the good things musical lovers found in our flagship NHB series. The CTH-8550 features newly designed power output stages which include on board regulated power supplies for a very compact global layout. This new circuit brings outstanding transparency, speed,...[more]

Security and customization Each CTH-8550 is delivered with its own dedicated USB key which contains all customer information: owners name, serial number,  firmware versionVoltage range settings. The provided USB key will also allow for eventually updating either CTH-8550s firmware or software in the future.Casing Entirely designed with a dedicated 3D-CAD software, the new cabinet is m...[more]

Circuitry Highlights Patent pending Krell iBias Class A technology allows our latest amplifiers to run in full Class A mode to full power while minimizing heat generation. All signal gain is realized in the current domain using discrete, proprietary, multiple-output current mirrors with extraordinary open loop linearity. There are no generic integrated circuits or op amps used anywhere. Current...[more]

Circuitry Highlights Patent pending Krell iBias Class A technology allows our latest amplifiers to run in full Class A mode to full power while minimizing heat generation. All signal gain is realized in the current domain using discrete, proprietary, multiple-output current mirrors with extraordinary open loop linearity. There are no generic integrated circuits or op amps used anywhere. Current...[more]

New technology which does not hurt sonic imaging combines the so-called "wire to wire connections" with PCB techniques to deliver outstanding sound quality. A relay attenuator contains two independent blocks for each particular channel which has improved channel separation. This kind of volume control is being used in competing amplifiers only in a much higher price range. Gain control by 1dB, ...[more]

The Enterprise is a monaural 300 watt power amplifier based on the Citadel, Theta's most powerful amplifier, and the Dreadnaught II. It benefits from the knowledge, research and dedication that team Theta brought to those superlatives designs. Enterprise has been created to power superb two channel music reproduction systems, as well as delivering abundant power to home theater systems, to fai...[more]

PrimaLuna EVO Tube Integrated Amplifier is the heart of music system. The EVO Tube Integrated Amplifier is the newest version of the original first member of high-quality tube products. PrimaLuna EVO Tube Integrated Amplifier has following features: 1. hand-made contruction of a heavy-gauge, fully-vented steel chassis with a five cot finish, each coat hand-rubbed and ploshed, holding th...[more]

The EVO Tube Poweramplifier is the newest version of the original first high-quality tube product. The PrimaLuna EVO Tube Poweramplifier main features: 1. Hand-made construction of a heavy-gauge, fully-vented steel chassis with a five coat finish, each coat hand-rubbed and polished, holding the finest point-to-point wiring, using workmanship that is normally only available at the highes...[more]

 Evolution Two is continuing the path of exploring our propriety direct  heated circuit with no global feedback. Evolution Two integrated amplifier is all about purity and preservation of the original music material. We’ve managed  to established unique sound performance, that derive the audio virtues form the iconic 300B tube, while keeping the natural vibrancy intact....[more]

PrimaLuna EVO Tube Integrated Amplifier is the heart of music system. The EVO Tube Integrated Amplifier is the newest version of the original first member of high-quality tube products. PrimaLuna EVO Tube Integrated Amplifier has following features: 1. hand-made contruction of a heavy-gauge, fully-vented steel chassis with a five cot finish, each coat hand-rubbed and ploshed, holding th...[more]

The EVO Tube Poweramplifier is the newest version of the original first high-quality tube product. The PrimaLuna EVO Tube Poweramplifier main features: 1. Hand-made construction of a heavy-gauge, fully-vented steel chassis with a five coat finish, each coat hand-rubbed and polished, holding the finest point-to-point wiring, using workmanship that is normally only available at the highes...[more]

Talking about heavy metal, try lifting a PrimaLuna to see just how much we put into them. All PrimaLuna models feature custom-designed toroidal and EI-frame transformers, made to the exacting spec of one of the most prestigious transformer designers in the US. Each transformer is fully encapsulated for the lowest hum and best isolation and offers huge output bandwidth and speaker control. There...[more]

PrimaLuna EVO Tube Integrated Amplifier is the heart of music system. The EVO Tube Integrated Amplifier is the newest version of the original first member of high-quality tube products. PrimaLuna EVO Tube Integrated Amplifier has following features: 1. hand-made contruction of a heavy-gauge, fully-vented steel chassis with a five cot finish, each coat hand-rubbed and ploshed, holding th...[more]

The EVO Tube Poweramplifier is the newest version of the original first high-quality tube product. The PrimaLuna EVO Tube Poweramplifier main features: 1. Hand-made construction of a heavy-gauge, fully-vented steel chassis with a five coat finish, each coat hand-rubbed and polished, holding the finest point-to-point wiring, using workmanship that is normally only available at the highes...[more]

PrimaLuna EVO Tube Integrated Amplifier is the heart of music system. The EVO Tube Integrated Amplifier is the newest version of the original first member of high-quality tube products. PrimaLuna EVO Tube Integrated Amplifier has following features: 1. hand-made contruction of a heavy-gauge, fully-vented steel chassis with a five cot finish, each coat hand-rubbed and ploshed, holding th...[more]

The EVO Tube Poweramplifier is the newest version of the original first high-quality tube product The PrimaLuna EVO Tube Poweramplifier main features: 1. Hand-made construction of a heavy-gauge, fully-vented steel chassis with a five coat finish, each coat hand-rubbed and polished, holding the finest point-to-point wiring, using workmanship that is normally only available at the highest...[more]

Maximal safety level has been achieved by using output transformer where headphones and other outputs are connected to separate galvanically insulated secondary windings, even global feedback is accomplished on the same way. PRINCIPLE: Also, as difference from usual OTL solutions, perfect matching of impedances for different types of headphones is achieved using different taps on output...[more]

A proprietary output stage with II C core output transformers accommodates a wide range of headphone impedance from 25-600 Ohms. The Head 2 drives many types of headphones with no sacrice to delity and with ease This is the ideal amp for shared listening sessions. The Head 2 also working as great tube preamplifier capable to drive all power amplifier even with very low input impedance. ...[more]

The Hercules II Mono employs a revolutionary twist on the concept of a fully balanced amplifier. In all balanced amplifiers, mirror-imaged amplifier circuits are used, with one part amplifying the positive half of an audio signal, and the other part amplifying the negative half. Yet in other balanced amps, the two halves are not quite equal, because one uses N-type transistors and the other use...[more]

The Stereo benefits from the same upgrades we made to the Mono. The power supply features substantially larger storage capacitors, to deliver cleaner DC power and more headroom on loud peaks. The pure copper bus bars used for the speaker outputs and power supply rails are twice the size of those in the original Hercules. Both of these improvements allow the Hercules II Stereo to perform even be...[more]

 In the true Jadis manufacturing tradition, you will find that all the internal wiring is done using hard wiring technology, with noble materials such as surgical grade stainless steel, 24 carat gold plating and silver wire, along with the hand-wound output transformers, which made the reputation of the brand, and whose trade secret is jealously guarded.These 2 x 40 Watts with KT120 give a...[more]

This integrated amplifier has several interesting points, including the use of Tung-Sol KT-150 tubes for the output stage in push-pull configuration. This choice was dictated by their sound quality and details, associated with their obvious power capability. In order to use the KT-150 in the best possible way, Jadis has reworked its schematic design and developed specific new output transformer...[more]

Jadis consists of a small band of valve devotees who have one over-riding philosophy: love for a job well done. And there is no denying that their passion is reflected in the many amplifiers, preamplifiers, CD players and DACs that have delighted thousands of music-lovers for more than three decades.     Although their products go through various circuitry updates over the...[more]

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The I/50 is designed to be easy to use, and has three controls on its top panel - Power, Input, and Volume. Two LexieTubes® provide display information for input selection and volume. Two matched pairs of 6550WE vacuum tubes, along with three 6922 tubes, stand in front of the perforated transformer cover. Three single-ended inputs and one XLR input provide connectivity for most systems, alo...[more]

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The Constellation Audio Inspiration INTEGRATED 1.0 is the newest member of Constellation Audio's most affordable Inspiration Series, and joins its preamplifier and amplifier line-mates in delivering the performance that is expected from Constellation Audio at a more affordable price. Delivering plenty of power, 100 wpc into 8 Ohms (and twice that into 4), a full array of balanced and single-end...[more]

The JA80 is a power amplifier working in pure class A. It is the first amplifier created by the JADIS in 1983; it has been upgraded several times but remains the flagship of the brand.   It works in a "push-pull" configuration with triple load and autobias. It can work with various types of penthodes: KT120, KT90, KT88, 6550, 6CA7 or EL34.   The MkII version brings...[more]

Jadis has adopted the KT120 valve, which will increase the power, reliability, the dynamic range and every other parameter of this milestone amplifier.Jadis has recognised that the brand-new KT120 expands on all of the virtues of the much loved KT88/6550 workhorses that have powered so many top-flight amplifiers. With their acceptance by Jadis, the doyen of French high-end amplifier manufacturers,...[more]

Jadis JA15 Tube Power Amplifier...[more]

JA 30 This amplifier Cet amplificateur ...[more]

JA 500  An aesthetic look of parallels and diagonals. The JA 500 amplifier reveals a perfection of lines and its two blocks per channel respond to an unusual symmetry of forms and colours. When the eye follows the opposite diagonal, it is caught first of all by the black shape of the output transformer, then by that of the capacitors at the rear end of the other block. Black on blac...[more]

Krell Industries has earned a distinguished reputation over the past 30-plus years for engineering innovation and product excellence. In 1999, the Krell engineering team headed up by Dave Goodman released the original KAV-300i integrated amplifier which stunned the world. At the time and conceptually, the original KAV-300i was the world’s first high-end integrated amplifier that delivered...[more]

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DarTZeel LHC-208 integrated streaming amplifier darTZeel is proud introducing its first integrated line amplifier with full digital streaming capabilities. Powerful, easy to use, extremely versatile, the darTZee LHC-208 fills the gap between conventional DACs and integrated amplifiers available so far. Key features include: • Newly designed TFT tactile screen for intuitive, user-friendly o...[more]

MLife is the product audiophiles have dreamed of for more than a decade, one that delivers the convenience and versatility of mass-market wireless/Internet audio products with sound quality that truly is second to none. In a single component, MLife combines a 32bit/192KHz PCM/DSD digital-to-analog converter, Apple AirPlay, Bluetooth, Internet radio and a 200-watt-per-channel Momentum integrated...[more]

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Until now, choosing an integrated amplifier always meant choosing compromise. But that's because until now, no integrated amplifier has ever borne the signature of Dan D'Agostino. The new D'Agostino's Momentum integrated amplifier combines the core audio circuits of the Momentum preamplifier and the Momentum stereo amplifier, both of which have been acclaimed by respected reviewers around the w...[more]

Every major section of the amplifier - power supply, input, driver, and output stages - have all been enhanced in this advancement. A new transformer winding pattern provides over 50% more current output from the same transformer footprint. This additional current offers greater headroom during dynamic passages. A reinvisioned input stage combines a brand new circuit topology with advanced comp...[more]

Benefiting from extensive development previously applied to the Momentum Series separate components, the Momentum MxV Integrated Amplifier executes on the potential that an integrated solution offers. The Momentum MxV integrated Amplifier is a modular design that is configurable to a listener’s preferences. The core line stage preamplifier section can be augmented to include a digital str...[more]

Every major section of the amplifier - power supply, input, driver, and output stages - have all been enhanced in this advancement. A new transformer winding pattern provides over 50% more current output from the same transformer footprint. This additional current offers greater headroom during dynamic passages. A reinvisioned input stage combines a brand new circuit topology with advanced comp...[more]

This is power enough to produce incredible, concert-hall dynamics with any speaker. Yet it is the size of a standard audio amplifier and weighs just 55 pounds. When you consider that the Centaur Monoblock weighs in at 103 pounds, and the Hercules II Monoblock at 220 pounds, the Inspiration's ability to deliver incredible power from a modestly sized chassis is remarkable indeed. Also remarka...[more]

DarTzeel true passion for music reproduction, which they have nurtured for 25 years, led us on a long quest to design an audio amplifier that can convey the emotions at the heart of a musical performance.Absolute sounds are proud to introduce the long-awaited result, the darTZeel NHB-108 model one stereo amplifier.Most consumer products today—even some very expensive audio components—are designed ...[more]

With the final darTZeel NHB-458, it sets a new standard: after nine years of constant research and continuous development, this amplifier, not only it owns all the qualities of the NHB-108, already acclaimed by the whole audiophile world, but it goes further in revealing a very special machine in every respect. Some key features -The output is still higher than that already showed off the proto...[more]

The most powerful amplifiers ever developed by darTZeel. NHB-468 monoblocks are the most powerful amplifiers ever designed and built by darTZeel. They are the culmination of nine years' research and development. NHB-468 mono amplifiers retain all the musicality of the original signal. The NHB-468's immense power supply ensures that they can cover the full dynamic range, providing e...[more]

The Orchestra displays stainless steel chassis with tubes mounted on  ceramic  sockets  with  golden  pins.  It  has  4  power  tubes mounted in push-pull which are driven by 2 ECC83. This unit is the result of a very thorough study undertaken by Jadis with one main objective: to make a product with all the essential qualities of a high-end ...[more]

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A new power device provides the foundation for an upgraded output stage. This new transistor, first used in the Relentless Mono Amplifier, extends high frequency response, increases power handling by a factor of four and features tighter tolerance gain matching between complementary NPN/PNP pairs. A wider safe operating area and superior gain linearity provides greater thermal stability through...[more]

Abundant power is required for realistic sound quality and is a cornerstone of Dan D’Agostino Master Audio Systems’ amplifier design. The Progression Stereo continues this practice. A graceful anodized Aluminum chassis houses a 2,000 VA power supply transformer coupled to nearly 100,000 microfarads of power supply storage capacitance. Paired to this foundation is a fully complementa...[more]

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Listening to Reference 750 SEL monoblocks in a high performance system is a transformative experience; under total control, speakers disappear from the listening room and the listener is transported into a three-dimensional realm where music takes on a palpable, tangible form. Details from source material are resolved against a black background, painting images in space with vivid reality. Bass...[more]

REFERENCE 75 SE VACUUM TUBE STEREO POWER AMPLIFIER, 75 WATTS The Reference 75 SE is a stunning amplifier in every way – performance, styling and reliability combined to elevate your music listening to a new experience.  Capable of controlling a wide variety of speakers, the Reference 75 SE will transport you into the musical performance unlike any other comparable amplifier. A...[more]

Outwardly, the 80S shares the same dimensions as the 160M. A single shallow whisper fan is built into the bottom plate. Flexibility is built-in, too, with XLR and SE inputs, 4-8-16 ohm output taps, 12V input and output triggers, RS232 input, tube hour meter, switchable fan speeds, and defeatable auto-off function. The feature set is the same as the 160S, including a proprietary auto-bias ci...[more]

Reference 160M Vacuum tube Monaural power amplifier After two years in development, the new Reference 160M (REF160M) Monoblock Power Amplifier is built like no other, looks like no other, and sounds like no other amplifier that you have ever heard, but it is unmistakably Audio Research. It features a refined audio topology with fewer and better components in the signal-path than in pr...[more]

Relentless Monoblock Amplifier Dan D’Agostino has always had a relentless desire to better his own creations, no matter how flawless they may seem. The Relentless Monoblock amplifier is the latest manifestation of that passion, the result of Dan’s desire for an amplifier that maintains its harmonic integrity and expansive soundstage from 0 watts to 1,500 watts. An amplifier so pow...[more]

Every major section of the Relentless Epic Mono Amplifiers- power supply, input, driver, and output stages - have all been enhanced in this advancement.  A new power management topology further isolates the power supply from the entirety of the audio circuitry providing extra protection from the noise the massive power transformers can generate. The Relentless Epic and Epic 800 employ ...[more]

Perfect Balance and Absolute Fidelity Crucial to the new circuit are the bipolar transistors powering the front end of the amplifier.  Activating the driver stage is a new bias stability circuit providing a nearly 50% increase in operating bias. Increasing Class A operation directly correlates to better sound quality. With this new circuit topology and the unique Copper/Aluminum heatsi...[more]

With its 5.5-kilowatt power supply feeding nearly 100 output devices, the Relentless Mono  Amplifier easily delivers 1,500 watts into 8 ohms—and when connected to a 220-volt or greater AC mains outlet, it doubles its output to 3,000 watts into 4 ohms and 6,000 watts into 2 ohms.  This power output is maintained with the same musical composure at full power as it is at 1 watt. ...[more]

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SE 300B:  " ... grain , precision and dynamics..." " It gives an inimitable 'material' character to timbers without, however, allowing sounds to lose their musical character".  It has a "...special gift of revealing the intimate relations that link music to silence" - Jean-Philippe Delalandre and Alexandre Geoffroy. It "develops a sense of pace and rhythmical movement of such...[more]

SE 845: "an immense crushing breadth, a grandiose sound image which extends way beyond the bounds of the speakers and even of the listening room..." - Alexandre Geoffroy. The SE 845 amplifier uses the legendary 845 triode in a pure class A monotriode configuration. In this sense it follows the path traced out by the SE300B,which is to say, the search for un paralleled mus...[more]

All signal gain is realized in the current domain using discrete, proprietary, multiple-output current mirrors with extraordinary open loop linearity. There are no generic integrated circuits or op amps used anywhere. Current 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 ...[more]

Circuitry Highlights Patent pending Krell iBias Class A technology allows our latest amplifiers to run in full Class A mode to full power while minimizing heat generation. All signal gain is realized in the current domain using discrete, proprietary, multiple-output current mirrors with extraordinary open loop linearity. There are no generic integrated circuits or op amps used anywhere. Current mi...[more]

Our Balanced Bridged topology uses only N-type output transistors, so the two halves of the audio signal are always perfectly balanced. In most fully balanced amplifiers, the schematics for the positive and negative halves of the amplifier circuit are mirrored, but one half uses N-type transistors and the other half uses P-type transistors. Thus, a perfectly balanced output can never be achieve...[more]

Constellation Audio, the renowned luxury goods manufacturer of high performance solid-state electronics, is pleased to announce the introduction of the new Revelation Series of components at CES 2017. CEO Dr. Murali Murugasu challenged his dream team of designers and engineers to develop a new series of Constellation Audio components that could deliver the essence of our renowned Performance Se...[more]

Constellation Audio, the renowned luxury goods manufacturer of high performance solid-state electronics, is pleased to announce the introduction of the new Revelation Series of components at CES 2017. CEO Dr. Murali Murugasu challenged his dream team of designers and engineers to develop a new series of Constellation Audio components that could deliver the essence of our renowned Performance Se...[more]

At the International CES Expo in Las Vegas, Krell introduced the most revolutionary design change in its 33-year history: iBias™, a patent-pending new technology that uses the Class A circuitry preferred by audiophiles yet consumes far less energy than a traditional Class A amplifier does. Because iBias technology eliminates crossover distortion, it allows the low-level details, subtletie...[more]

The big change from the VT80 to the new VT80SE is upgrading the KT120 tubes to the higher performance KT150 output tubes. Everyone should know that we have been deeply enamored with the KT150 as we feature it in all of our other amplifiers, from the VSi75 to the REF 750SE. Its performance is unparalleled and its 3,000 hour average life allows years of uninterrupted listening. The VT80 was origi...[more]

The Model 100.2 stereo power amplifier sets new standards in musicality and value against all other competitors at or near its price. Rated conservatively at 100 WPC into 8 ohms, the 100.2 produces 200 WPC into 4 ohms and a hefty 360 WPC into 2 ohms -- giving it sufficient drive to handle a wide variety of todayÂÂÂÂ’s leading loudspeakers. Both single-ended and bal...[more]

The 150.2 produces a strong 150 WPC into 8 ohms, and 300 WPC into 4 ohms. BAL and SE inputs are provided, along with a 12V trigger and detachable A.C. power cord. Like the 150M, the 150.2 produces very little heat because of its high efficiency, so it is ideal for in-cabinet installations. Handles are optional at additional cost, as on the 150M. Musically, the 150.2 is very much like the remark...[more]

The market for multichannel power amplifiers is crowded, competitive and compromised. Most conventional designs have shortcomings in terms of size, heat, or, most importantly, sonic performance. Audio Research has waited to enter this market until the technology to break through these compromises was fully developed. That time has come.The 150M is unlike any previous amplifier design you have seen...[more]

500 watts per channel into 8 ohms: The Centaur Mono owner need never worry about power, no matter what speakers are used. The power output is sufficient to drive any speaker, of any impedance or sensitivity, with enough headroom to practically eliminate the possibility of audible distortion from the amplifier. Unique modular design: The Centaur Mono gets its power not from bulking up a smaller de...[more]

250 watts per channel into 8 ohms :With the current to deliver 500 watts into a 4-ohm load and 800 watts into a 2-ohm load, the Centaur has enough power to drive any speaker, even state-of-the-art full-range models. Balanced drive circuit design: Because the Centaur uses only N-type output transistors, it achieves essentially perfect positive/negative balance—something no amplifier that use...[more]

The integrated amplifier CSA29 combines the benefits of both valves and transistor amplification using the synergic design concept that has made Copland hybrid amplifiers widely acclaimed.The amplifier uses two valves in the input differential stage, allowing the notably smooth and transparent properties of the valves to blend with the power and dynamics of the transistor electronics.  The am...[more]

The current capacity of the CTA405 power supply and output transformers is fully sufficient for a 100 Watts output power. However, with operation conditions set for minimum variation of plate and screen current in the output stage, excellent performance is obtained with very low feedback at 2x 50 Watts per channel. The output transformers are specially made for this amplifier. Employing a hig...[more]

A two channel power amplifier in a slim line chasses. Combining the virtues of valve design with solid state circuit for high power stability and strong dynamics driving any speaker load with a clean undistorted signal.  Field effect transistors are used for both the input and driver stages. Like vacuum tubes they are voltage controlled and allow for circuitry design with a minimum of non-eve...[more]

Using the same philosophy as the DA50, the DA88 has double the power and accepts the KT88 too. Taken out in 2004, it has already gained a great success everywhere around the world....[more]

DA 30 To the attentive ear, the sound produced by the DA 30 is one of great fullness and of intense energy. The association of these two characteristics creates a musicality that is harmonious and melodious.This 30-watt amplifier, remarkable for its excellent stereo image, unites details and delicacy with an utter purity. All the connecting sockets have been plated with fine go...[more]

DA 5 ' " The truthful lying" that Malraux spoke of ' J-M.P  in DIAPASON April 1996 The DA 5 belongs to the same price range as the DPL2, and is often associated with it in specialist reviews. The coherence of the whole in timber and dynamics is undeniable. It is able to drive loud-speaker systems of medium efficiency without any problem of treble distortion. ...[more]

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DA 60  This integrated amplifier creates a visual effect of fullness from the point of view of its colours and its forms as well as an optimal use of space. A golden front plate on the chrome chassis, the blue capacitors, the shiny tops of the tubes and the transformer covers, together with the warm glow of the tubes produce an impression of abundance. ...[more]

DA 60  This integrated amplifier creates a visual effect of fullness from the point of view of its colours and its forms as well as an optimal use of space. A golden front plate on the chrome chassis, the blue capacitors, the shiny tops of the tubes and the transformer covers, together with the warm glow of the tubes produce an impression of abundance. ...[more]

DA 7  " The grand illusion" - Jonathan Valin l The DA 7 is a monoblock amplifier of 2 x 100 watts with an imposing presence : its transformers arrest the eye and at the same time create a visual barrier. ...[more]

DA 8: "The truthful lying" that Malraux spoke of ' J-M.P  in DIAPASON April 1996 The DA 8 belongs to the same price range as the DPL2, and is often associated with it in specialist reviews. The coherence of the whole in timber and dynamics is undeniable. It is able to drive loud-speaker systems of medium efficiency without any problem of treble distortion. ...[more]

PrimaLuna amps are famous for long tube life, running cool, and being absolutely the easiest amplifier to own. What we've done is increase the power and output transformer size, designed and built a larger Adaptive AutoBias board, and all the supporting circuitry required to run eight power tubes instead of four.  Doubling the power and increasing bass slam.Customers can use almost any...[more]

Art Dudley, one of the most famous and well-respected reviewers in the industry, reviewed the DiaLogue Premium power amp as stereo amp, not even in the more powerful monoblock mode.  He was swift to say "I tried to fiind fault with the PrimaLuna DiaLogue Premium.  I failed."  He went on to say that he has had the pleasure of reviewing some remarkable amplifiers, and that the DiaL...[more]

Let's look at what makes it different.  The more you study, the more you will agree with the experts: -Adaptive AutoBias -Swiss made wiring -ALPS Blue Velvet motorized volume control tracks better so a defined stereo image is established and doesn't collapse as you raise and lower volume -TAKMAN Resistors -SCR Tinfoil Caps -AC Offset Killer -New front-end circui...[more]

The DiaLogue Premium Series also includes the same innovative circuits found in the ProLogue Premium series, that protect the amp and improve sound at every level: -BTI-circuit. BTI stands for "Bad Tube Indicator." On the chassis’ deck in front of each power tube, is a small LED that lights up if the tube goes bad. The circuit then puts the amp into protection mode.  With other brands,...[more]

Housed in a chassis the same size as the DSi200 integrated, the DS225 continues the design hallmarks of the DS450. Audio Research’s proprietary Class D all discrete analog switching mosfet output technology is again combined with a large, linear analog power supply, yielding tremendous speed and power delivery, but doing so with cool-running efficiency, idling at only 38 watts. The DS225 is ...[more]

The power supply is a classic linear, analog supply, heavily regulated and scaled up to provide explosive dynamics and impact. Its 1239 joules of energy storage are twice that found in the DSi200. Dynamic power is 900 watts into 8 ohms, 1800 into 4 ohms, and 2800 into 2 ohms, meaning the DS450 can control those big, tough-to-drive speaker systems. The output stage is a high-speed pulse-width modul...[more]

There are several reasons to choose the DS450M over its stereo counterpart. The most important is performance-based: a monaural amp simply produces a bigger, more spacious stage by virtue of the channels being totally isolated. Also, we were able to fit a much larger , power supply in the chassis. Then there is the issue of size: the DS450M is smaller and easier to situate than the hefty DS450 ste...[more]

The Definition Series of amplifiers represents an unusual type of "solid-state hybrid" design in which a massive, highly regulated, linear analog power supply is combined with a truly "green" discrete analog switching-MOSFET output stage for highly efficient power conversion and low power consumption. The analog power supply and all-discrete MOSFET output stage are pure Audio Research expressions ...[more]

 Sophisticated and expensive to execute, surface mount circuitry is featured throughout gracing the design with short circuit path lengths, vanishing parasitic capacitance and improved bandwidth. Alone, the Evolution 2250e is ideal for use in stereo music systems. When coupled to the three channel Evolution 3250e, this duo makes ideal amplification for home theater applications.   PRO...[more]

FEATURES:Active Cascode Topology eliminates global negative feedback, only nested local feedback is employed around individual gain blocks. The result is an extraordinarily open, liquid, effortless sound. The signal path incorporates Krell Current Mode and CAST circuitry using proprietary multiple-output current mirrors in a complementary and balanced arrangement for extraordinary open loop linea...[more]

The FTC mandates that power ratings are quoted using a 1000 Hz sine wave into a fixed 8 Ohm resistor with final power specification stated at 1% distortion. Krell engineering considers this specification too lenient and not indicative of what an amplifier is required to provide. Krell designs to a much stricter standard. Our power tests use a 20-20,000Hz signal into 8, 4, and 2 Ohm loads. Our p...[more]

The Evolution Series culminates more than two decades of cutting edge audio design and includes stereo and home theater components that embody 26 years of Krell design and manufacturing excellence. When envisioning Evolution, Krell had a solitary goal - to handcraft a range of components that, simply put, were the best sounding products ever built. The result is a synthesis of almost impossible co...[more]

In this application, the Evolution 402e gets mated with the Evolution 707 Reference Surround Preamplifier/Processor and an Evolution 403e Three Channel Amplifier for ultimate home theater performance. Power Supply The Evolution 402e is equipped with two 2,200 VA transformers and 188,000 ÄĚĚĹžF of capacitance. This power source is the backbone for the output of t...[more]

All Evolution Series components are available in diamond-cut silver and a luxurious black finish.The new Evolution amplifiers enjoy the hereditary advantage, from faceplate to binding posts, first born in the Evolution One amplifier. Realized in monaural, stereo, and three channel configurations, the Evolution amplifiers bring the engaging reproduction of music and movie soundtracks debuted in ...[more]

Outputting a daunting 600 watts of power and coupled to Krell Evolution e Series circuit technology, the Evolution 600e is a velvet hammer. Power Supply   The Evolution 600e is equipped 2 2,200 VA transformers and 108,000 µF. This power source is the backbone for the output of the Evolution 600e. With this foundation, the Evolution 600e delivers 600 watts into 8 Ohms, 1,200 watts into 4...[more]

All Evolution Series components are available in diamond-cut silver and a luxurious black finish.The new Evolution amplifiers enjoy the hereditary advantage, from faceplate to binding posts, first born in the Evolution One amplifier. Realized in monaural, stereo, and three channel configurations, the Evolution amplifiers bring the engaging reproduction of music and movie soundtracks debuted in ...[more]

 FEATURES: Power Supply The Evolution 900e is equipped with two 3,000 VA transformers and 108,000 µF. This power source is the backbone for the output of the Evolution 900e. With this foundation, the Evolution 900e delivers 900 watts into 8 Ohms, 1,800 watts into 4 Ohms, and 3,600 watts into 2 Ohms. The FTC mandates that power ratings are quoted using a 1,000 Hz sine wave into a fixed ...[more]

Evolution One, the output impedance of the final gain stages is one hundredth that of the final gain stage in most power amplifiers. This provides extremely wide bandwidth and very high current capability. The Evolution One does not employ global negative feedback--the final gain stages use only 8 dB of local, nested negative feedback. This is one-five hundredth of the amount used in most solid...[more]

The Fully Balanced Integrated Amplifier (FBI) is a large-format integrated amplifier that offers all the power and control afforded by big Krell amplifiers in a convenient, integrated package that is simple to operate. A new Current Mode preamplifier topology features an Evolution CAST input for pristine signal integrity. A balanced, 300 watt/channel amplifier delivers the dynamic contrasts for...[more]

Highlights Substantial Class A power output of 250 Watts into 8 Ohms, 500 Watts into 4 Ohms, and 1000 Watts into 2 Ohms assures tremendous reserves of dynamic headroom for the reproduction of any source material. Available individually, in symmetrical pairs, and in three-piece and five-piece groupings to best address application needs. Fully active regulation via microprocessor based regulators f...[more]

The Full Power Balanced 650Mc Power Amplifier is the most powerful amplifier in the Krell Full Power Balanced Series. It provides the monumental power output of 650 Watts into 8 Ohm, 1300 Watts into 4 Ohm, and 2600 Watts into 2 Ohm loudspeaker loads. It is built in limited quantities and by special order. The model for this power house came from a custom amplifier that C.E.O. Dan D’Agostino design...[more]

The Full Power Balanced 200c Stereo Power Amplifier is designed for the audiophile who wants the ultimate sound quality from a stereo amplifier with power capabilities of 200 Watts per channel into 8 Ohm, 400 Watts per channel into 4 Ohm, and 800 Watts per channel into 2 Ohm loudspeaker loads. Highlights Fully balanced circuitry from input to output insures signal integrity, rejects noise, and...[more]

The Full Power Balanced 300c Stereo Power Amplifier is designed for the audiophile who wants the ultimate sound quality from a stereo amplifier with power capabilities of 300 Watts per channel into 8 Ohm, 600 Watts per channel into 4 Ohm, and 1200 Watts per channel into 2 Ohm loudspeaker loads. Highlights Fully balanced circuitry from input to output insures signal integrity, rejects noise, ...[more]

The Full Power Balanced X Series Stereo Amplifiers offer the greatest performance possible from a stereo amplifier. All X Series amplifiers share the same circuit topology, from the 300 Watt Full Power Balanced 300cx and the mid-level FPB 400cx at 400 Watts, to the awesome 700 Watt FPB 700cx, the most powerful stereo amplifier ever offered by Krell. While the amplifiers have much in common, there ...[more]

The Full Power Balanced 350Mc Monaural Power Amplifier delivers Class A power: 350 Watts into 8 Ohm, 700 Watts into 4 Ohm, and 1,400 Watts into 2 Ohm loudspeaker loads. It offers high power and Krell Full Power Balanced sound quality for high-end two channel as well as high-end multi-channel sound system applications.The substantial current capability of the Full Power Balanced 350Mc provides sign...[more]

With the introduction of the Master Reference Amplifier in 1999, Dan D'Agostino established a level of amplifier performance without equal. The new X Series of Full Power Balanced monaural amplifiers are the direct descendants of this design. Sharing the same circuit topology as their stereo counterparts, the monaural amplifiers raise sound reproduction to a new level by dedicating an amplifier fo...[more]

The Full Power Balanced X Series Stereo Amplifiers offer the greatest performance possible from a stereo amplifier. All X Series amplifiers share the same circuit topology, from the 300 Watt Full Power Balanced 300cx and the mid-level FPB 400cx at 400 Watts, to the awesome 700 Watt FPB 700cx, the most powerful stereo amplifier ever offered by Krell. While the amplifiers have much in common, there ...[more]

With the introduction of the Master Reference Amplifier in 1999, Dan D'Agostino established a level of amplifier performance without equal. The new X Series of Full Power Balanced monaural amplifiers are the direct descendants of this design. Sharing the same circuit topology as their stereo counterparts, the monaural amplifiers raise sound reproduction to a new level by dedicating an amplifier fo...[more]

Highlights Fully balanced circuitry from input to output insures signal integrity, rejects noise, and improves signal-to-noise ratios to deliver a "night and day" sonic difference when compared to typical single-ended circuitry. Computer regulated power supply provides consistent sound quality at wide dynamic range regardless of fluctuating line voltages. Current mode operation ensures wide b...[more]

The Full Power Balanced X Series Stereo Amplifiers offer the greatest performance possible from a stereo amplifier. All X Series amplifiers share the same circuit topology, from the 300 Watt Full Power Balanced 300cx and the mid-level FPB 400cx at 400 Watts, to the awesome 700 Watt FPB 700cx, the most powerful stereo amplifier ever offered by Krell. While the amplifiers have much in common, there ...[more]

With the introduction of the Master Reference Amplifier in 1999, Dan D'Agostino established a level of amplifier performance without equal. The new X Series of Full Power Balanced monaural amplifiers are the direct descendants of this design. Sharing the same circuit topology as their stereo counterparts, the monaural amplifiers raise sound reproduction to a new level by dedicating an amplifier fo...[more]

GS150 POWER AMPLIFIER An amplifier is the workhorse of any system – it is responsible for receiving small signals from a preamplifier or source component, and developing them into larger currents to control a loudspeaker. To that end, the GS150 has been designed to seamlessly integrate into any system and steadfastly perform its task. Challenging source material and difficult sp...[more]

A preamplifier, amplifier, phono stage, and digital to analog converter all in one chassis, the GSi75 combines with your favorite speaker to deliver a singular and simple solution to control your listening system. Unlike other integrated designs that make performance - sacrificing compromises to fulfill a price point or form factor, the GSi75 harnesses the power and technologies developed by...[more]

We call it "Hybrid Drive" because that’s how it works.  As in the REF110, a JFET input (for low noise) feeds a 6922 dual triode gain stage, which in turn feeds a 6H30 dual triode cathode follower which drives the outputs through our proprietary coupling capacitors (first used in our REF3 preamp).  This vacuum-tube input/driver arrangement sets the stage for superbly musical perform...[more]

JA 100 This is the first of the new JADIS amplifier range with new schematics and new output transformer. ...[more]

JA 200 An aesthetic look of parallels and diagonals. The JA 200 amplifier reveals a perfection of lines and its two blocks per channel respond to an unusual symmetry of forms and colours. When the eye follows the opposite diagonal, it is caught first of all by the black shape of the output transformer, then by that of the capacitors at the rear end of the other block. Black on black, chrome on ...[more]

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An aesthetic look of parallels and diagonals. The JA 800 amplifier reveals a perfection of lines and its two blocks per channel respond to an unusual symmetry of forms and colours. When the eye follows the opposite diagonal, it is caught first of all by the black shape of the output transformer, then by that of the capacitors at the rear end of the other block. Black on black, chrome ...[more]

The elegant Krellcoat exterior hides the powerhouse that resides within this amplifier. Refined reproduction and overwhelming power defines the KAV-2250. Utilizing technology developed in the Krell Full Power Balanced amplifiers including oversized power supplies, Krell Current Mode circuitry, and balanced signal paths, this amplifier is ideal for use in stereo music and movie soundtrack reproduct...[more]

The KAV-300iL Integrated Amplifier provides essential power and control for audiophile music systems. It offers a high level of sound quality, with a smoothness and surety of operation matched by few other components at any price.The KAV-300iL is an ideal component for audiophiles who hold quality, performance, and convenience as their highest goals. Highlights Maximum power output of 200 Wat...[more]

The Krell KAV-400xi is a high performance integrated amplifier that combines the hallmarks of Krell engineering design-Class A amplification, balanced circuitry, unique technology, Krell build quality, and impeccable sonic performance into one, beautifully styled component. Sonically, the KAV-400xi features a prodigious bass response, an open, natural sounding midrange, and highs that are extended...[more]

The Master Power 2+ combines circuitry derived from Dan D'Agostino's acclaimed Momentum amplifiers with advanced features that make it ideal for 2.1-channel music systems and advanced home theaters. The amplifier easily delivers 300 watts per channel into 8 ohms, but this can be increased to an astounding 1,000 watts by bridging the two channels. Switches on the back allow bussing of one signal...[more]

The Classic Stereo is the most cost-effective way to experience the incomparable sound quality of Dan D'Agostino Master Audio Systems. Its core technologies are heavily based on the design of D'Agostino's acclaimed Momentum amplifiers. The sound combines the immense power and current needed to drive even the most exotic speakers with a subtle, sweet musicality normally associated with much smal...[more]

The Momentum Monoblock Amplifier Achieving what was once thought impossible: incredible power and incomparable finesse in a compact chassis. Creating an amplifier that could meet all the demands of today's audiophiles required two things: one of the world's most talented and experienced designers, and a clean slate. The Momentum is the first amplifier offered by Dan D'Agostino under his own nam...[more]

The Momentum amplifier helped launch Dan D'Agostino Master Audio Systems and delivered magnificently on the initial design goals of formidable power and incomparable finesse from a compact chassis. Chief Engineer and Designer Dan D'Agostino started an engineering exercise that resulted in an exciting new breakthrough that D'Agostino felt compelled to include in the Momentum amplifier. This rese...[more]

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The amplifier technology that is winning acclaim from reviewers as “the best” is now available in a stereo amplifier—at less than one third the cost of the original. D’Agostino LLC today announced that it will begin shipping the new Momentum stereo amplifier in November 2011, at a suggested retail price of $25,000. The Momentum stereo amplifier carries the same uniqu...[more]

Master Reference Amplifiers bring a new level of performance to sound reproduction and elevates the listening experience to unprecedented heights. Innovative technology controls the vast power generated by the amplifiers: Core technologies have been enhanced for exceptional power, control, and performance. These amplifiers build on the Krell legacy, providing a superabundance of power with unprec...[more]

Jadis Orchestra Dip Tube Integrated Amplifier...[more]

THE PROGRESSION MONO DESIGN combines two normally exclusive traits—remarkable power output and exquisite musical finesse. Power is essential to realistic sound reproduction. The Progression mono amplifier is the largest and most powerful the company has made, delivering 500 watts into 8 ohms, doubling to 1,000 watts into 4 ohms and doubling again to 2,000 watts into 2 ohms. Of course, it ...[more]

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The ProLogue Classic Integrated brings you to a world of glorious tube sound and superior engineering and parts selection: Innovative Adaptive AutoBias A PrimaLuna exclusive.  If anybody tells you that they have auto bias, ask them precisely how.  It's most likely not true.  As with all PrimaLuna amps, you never have to worry about biasing your amp ever again, and the need for matc...[more]

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Incorporating the best electronic elements of the original ProLogue Series, plus selected ground-breaking features from the more advanced DiaLogue Series, the next generation ProLogue Premium Integrated Amp is an engineering marvel — a single, integrated amplifier that sets a new benchmark in high-performance audio with the following features: *Innovative, new Adaptive AutoBias™ circui...[more]

Incorporating the best electronic elements of the original ProLogue Six and Seven, plus selected ground-breaking features from the more advanced DiaLogue Series, the next generation ProLogue Premium Series is an engineering marvel — a single pair of monoblock amplifiers that sets a new benchmark in high-performance audio with the following features: *Innovative, new Adaptive AutoBias ...[more]

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Incorporating the best electronic elements of the original ProLogue Four and Five, plus selected ground-breaking features from the more advanced DiaLogue Series, the next generation ProLogue Premium Series is an engineering marvel — a single, stereo power amplifier that sets a new benchmark in high-performance audio with the following features: *Innovative, new Adaptive AutoBias circu...[more]

Simply put, the REF150 SE is a breakthrough in stereo power amplification.  Replacing the REF150—which was one of the most respected modern stereo amplifiers—was a daunting task, but it has been accomplished.  The REF150 SE offers more power, greater dynamic thrust, a more vivid and resolved presentation, greater finesse, and quieter operation.  It is the new benchmar...[more]

The Reference 210 presents a familiar yet distinctive appearance. The chassis is enclosed, with a thick front panel the same height and width as the VT100/VTM200, but with a vacuum-flourescent display screen like the one featured on the REF3 and REF610T. The chassis is 19.5" deep (plus handles) and has an internal frame like the 150M, with a one-piece ventilated cover that wraps around the top and...[more]

The concept of a large monoblock amplifier is to provide control to a speaker.  The difficult part of the job is maintaining finesse and musicality while doing it.  Audio Research has produced some of the most critically acclaimed products during its 42-year history and the new Reference 250 SE aims to break new ground. From the moment the music begins, the foundation of an ex...[more]

The REF300 monoblocks have created as much of a stir among audiophiles and music lovers as the larger REF600s did when first introduced in late 1995. Well, we're happy to announce that REF300 owners now have good reason to be excited all over again with the introduction of the new and improved REF300MKII First, the sonic improvements embodied in the MKII version are nothing short of monumental...[more]

Following upon the technical changes that have been so successfully received in the MKII version of the REF300 monoblocks, similar changes have now been made to the design of the REF600 model. The resulting improvement in sonic performance is, if anything, even more dramatic in the 600-watt flagship model. As in the REF300, the REF600MKIII has been refitted with new audio and power-supply circu...[more]

When the Reference 600 Power Amplifier was introduced in 1995 it set a new standard for High Definition® in music reproduction. In every meaningful category, the Reference 600 - 300 amplifier series remained at the pinnacle of audiophile performance. Now the REF600-300 legacy continues with a new flagship from Audio Research: the Reference 610T monoblock.     Like its pr...[more]

The Reference 750 SE monoblock amplifier continues the story begun 20 years ago with the introduction of the Reference 600; that is, to create the ultimate, tube-driven amplifier with enough power to drive any speaker load and to provide a musical experience unlike any before it. The Reference 750 SE redefines all expectations of what is possible from an amplifier in a music playback system....[more]

The thick front panel simply has an On/Off switch and corresponding LED and does not contain the vacuum-fluorescent display found on its more powerful siblings.  The attractive internal layout is similar in appearance to the REF210 with the right and left channel boards mounted horizontally, flanking the transformers mounted on a raised central channel running front-to-back. A small LCD displ...[more]

When Introduced i, the REF110 power amplifier proved to be one of the most respected and popular stereo power amps ever produced by Audio Research. Now it is superseded by the new REF150, offering more power, more sonic finesse, quieter operation and a more contemporary appearance. Having identical outer dimensions as the REF110, the new REF150 has much more packed into its chassis. Refined fro...[more]

First, you will notice a more modern, monochromatic appearance, including a new front panel with a small aluminum power button: natural units include silver handles and top cover, while black units come with black panel, handles and top cover. A new analog meter replaces the vacuum-fluorescent digital display of its predecessor; this illuminated meter is capable of displaying power output, line...[more]

The REF75 is a great looking amplifier, slightly reminiscent of our older classic designs.  The front panel has two illuminated analog power/bias meters, one for each channel.  Under each meter is a knob to switch from power output to bias monitoring for each output tube.  Bias adjustment points are accessed from the front panel, too, offering real convenience.  The outer di...[more]

The appearance is more refined and attractive, but is clearly a statement piece from Audio Research. A new, optional 12V fan-cooled silver top cover is available at additional cost.   Using the now-standard KT120 output tubes (8 matched pairs, driven by another matched pair) in the classic Audio Research push-pull Class AB output stage, the input stage has been streamlined, using very low ...[more]

The S-150m is a slim line monaural power amplifier boasting our latest circuit topology and a substantial power output of 150 Watts into 8 Ohms and 300 Watts into 4 Ohms. The elegant exterior houses the technology developed in the Krell Evolution amplifiers including Krell Differential Current Mode circuitry and balanced operation. The S-150m is the ideal choice for high performance systems in ...[more]

The S-275 is a slim line stereo power amplifier boasting our latest advancements in circuit design featuring an impressive 275 Watts per channel into 8 Ohms and 550 Watts per channel into 4 Ohms in stereo mode. Setting the rear panel switch to mono operation, the S-275 boasts a massive output of 550 Watts into 8 Ohms and 1,100 Watts into 4 Ohms. Technologies developed for the Krell Evolution am...[more]

AUDIOPHILE GRADE INTEGRATED AMPLIFIER Employing a massive 750 VA toroidal transformer and 38,000 microfarads of capacitance, the S-300i sets the performance standard for integrated amplifiers. At 150 Watts per channel into 8 Ohms and 300 Watts per channel into 4 Ohms the S-300i is built to meet the demands of today's latest loudspeaker technology. A KRELL Class A, direct coupled design, ful...[more]

It was all a bit of shock back in the ‘90s when Krell suddenly introduced a neat little integrated amplifier in the form of the KAV-300i - such a contrast to their tradition of big, beefy power amps. But once past the scepticism we all realised, perhaps to our surprise, that this slim and unassuming device actually had a good measure of Krell’s unique signature: control, dynamics an...[more]

Like the larger HD220, the new SD135 ("SD" for "Silicon Drive") uses Thermal TrakŽ self-biasing output devices in a Class A-B design. And like the HD220, it accommodates either single-ended or balanced inputs. But unlike the larger hybrid, the SD135 features an all-solid-state input stage using multiple JFET devices in each channel, directly driving the output stage – no interstage coupling capa...[more]

The Vanguard’s amplifier incorporates a massive power supply with a 750 VA toroidal transformer and 80,000 microfarads of storage capacitance. The tremendous amount of energy on tap provides 200 watts per channel into 8 ohms and 400 watts into 4 ohms. Two quiet, thermostatically controlled fans permit the use of a surprisingly compact chassis. The preamplifier section of the Vanguard ...[more]

The Digital Vanguard incorporates a 200-watt-per channel amplifier and a Class A preamplifier, enclosed in a chassis that borrows its design and construction from the new Krell Foundation preamp/processor, Connect stream player, Illusion preamp and iBias amplifiers. Digital support has been included with USB, HDMI, coaxial, and optical inputs as well as Ethernet audio and Bluetooth streaming. ...[more]

Its purpose is to provide the differential signal for true balanced operation, a first for this series. With both balanced and single-ended inputs (switch selected), the VM220 will be compatible with every Audio Research preamplifier. In addition, the VM220 uses a super-wide-bandwidth output transformer to provide better frequency extension, explosive musical dynamics, and more powerful bass ex...[more]

The chassis, circuit layout and feature set of the VS110 are almost identical to the VS55, but scaled up to accomodate the greater power output. The chassis itself measures 17 1/2" W by 19" D, and features an anodized, natural-finish top plate labeled with tube location/type, output-tube bias access points and the inset Audio Research logo. The chassis front holds a rocker-style power switch and g...[more]

The VS115 revisits the classic look of the VS110 with its open architecture and natural anodized top plate – now more ventilated for better heat dissipation. Drawing upon the successful REF110 input stage design, the VS115 uses a FET input with two 6H30 triodes in each channel for gain and as a cathode follower-driver for the 6550C-equipped output stage. This allows both balanced and single-ended...[more]

The VS55 makes a wonderful companion to the recently introduced SP16 preamplifier. Together, these exciting new companion products enable you to assemble a true Audio Research music system at a more reasonable cost. Like the SP16, the VS55 represents a fresh, new design direction for Audio Research. Using an open (rather than fully enclosed) chassis architecture, the VS55 features a milled, anodiz...[more]

Its rated output of 50 watts per channel does not convey the VS60's ability to drive power-hungry, low-impedance loudspeakers. Audio Research designed the VS60 with the finest full-range speakers, not compact monitors. Dynamics are lifelike with a sense of ease normally associated with larger amplifiers. Yes, its resolving power is surprising, allowing you to hear details that were previously hidd...[more]

With an unbeatable combination of great sound, cool packaging and affordable pricing, the VS55 and VS110 amplifiers have been garnering rave reviews and enjoying brisk sales around the world. We are very pleased to inform you of an addition to the series, the VSi55 Integrated Amplifier. With a rated output of 50 watts per channel and a reasonable price, a remarkable level of performance, build qu...[more]

Its rated output of 50 watts per channel does not convey the VSi60's ability to drive power-hungry, low-impedance loudspeakers. Audio Research designed the VSi60 with the finest full-range speakers, not compact monitors. Dynamics are lifelike with a sense of ease normally associated with larger amplifiers. Yes, its resolving power is surprising, allowing you to hear details that were previously hi...[more]

The VSi75 integrated amplifier breaks new ground in an ‘all in one’ product design, and sets a new benchmark in the lifelike reproduction of music. The VSi75 continues the design series of ‘open chassis’ products from Audio Research such as the VSi60 and VS115, yet incorporates new developments from the Reference series product to combine in a visually striking and so...[more]

Absolute Sounds is pleased to introduce the VT80 vacuum-tube power amplifier to its Foundation Series. From the same design and engineering team responsible for the award-winning Reference Series, the VT80 allows the Foundation Series to be shown as a complete system. Combining an enticing new aesthetic with worry-free operation and great performance, the VT80 is a vacuum-tube amplifier tha...[more]

Since the spring of 1996 the VT100 established itself as the benchmark amplifier in its price range. Accolades from the press and music lovers grew even louder with the 1998 introduction of the MKII because of its improved dynamic swing, more refined performance, and ability to drive so many "difficult" loudspeakers which normally could not be used with other vacuum-tube amplifiers. Well, the VT10...[more]

The VT200 vacuum tube stereo power amplifier is the most powerful of the three VT-series models. Rated at 200 watts per channel into a wide range of speaker loads, the VT200 encompasses a "dual mono" circuit layout reaching back to the massive single power transformer. Eight matched pair of 6650C output tubes and 674 joules of distributed energy storage give the VT200 unwavering control over the m...[more]

Based on the same circuit design as the VT100 and VT200, the VT50 features a dual-mono circuit layout reaching back to the large power transformer. Two matched pair of 6550-C tubes provide the output (one pair each channel), while four 6922 twin triodes serve as input and driver tubes (two each channel). Constant-current source technology (as used in the Reference Series) help maintain output stag...[more]

The Valve VTM200 vacuum tube stereo power amplifier is the most powerful of the three Valve-series models. Rated at 200 watts per channel into a wide range of speaker loads, the Valve VTM200 encompasses a "dual mono" circuit layout reaching back to the massive single power transformer. Eight matched pair of 6650C output tubes and 674 joules of distributed energy storage give the Valve VTM200 unwav...[more]