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  • Adcom GFA5300

    Adcom GFA5300

    Adcom GFA5300 bench tested, works properly Learn More

  • Marantz MA500

    Marantz MA500

    Marantz MA500 Treat your family and guests to quality entertainment by using the Marantz MA-500 1 Channel Power Mono Amplifier. This unit is compact enough to be functional and stylish in practically any spot in a room. Able to deliver 125 watts into 8 ohms, this product is ideal for powering just about any speaker. In fact, it can create a new multi-channel home theater or provide an additional channel for amplifiers to an existing system. An RC-5 remote control also makes it possible for users to change settings without getting up from the comfort of their seats. This black amp weighs a mere 13.2 pounds, which makes it possible for users to move it easily from one spot to another. They measure 19 inches in depth by 3.5 inches in width by 6 inches in height.This Monoblock equipment is specifically designed for use in home theaters and surround-sound system setups. The 125-watt and 180-watt performance delivers high power into 8-ohm loads, ensuring that users don't lose signals even in challenging audio environments. A frequency response between 10 and 100K combines with a signal-to-noise ratio of less than 116 decibels, making it a practical choice for beginners who want a high-tech music solution that can easily synchronize with a variety of music systems and accessories. The product can be bridged at 8 ohms for a total of 360 watts.This isn’t just a reliable product for home theater and small professional setups. The amp also boasts an excellent reputation for its support for home computers, car subwoofers, speakers, and other accessories. In fact, these amps will never run out of breath. Marantz MA-500 1 Channel Power Amplifier can really provide a lot of RMS power. Buyers should not rule out flexible integration of these capable products because they can offer a pleasing experience when properly paired and tuned.This product delivers the kind of performance enthusiasts expect from the highest-end amp. It has plenty of reserve energy even when hooked up with some of the most modern speakers and receivers. As for performance, the sound quality will endure even at lows as low as 20 hertz. In addition, it will continue to show clear and precise mids and highs almost every time. Even non-audiophiles are likely to be impressed by the clear sound and amazing bass response. This is the kind of performance that’s sure to keep you on your toes. That’s particularly true when hooked up to phono preamplifier or even ma-9s2 block amps, receivers, advance stereo headphones, and other monoblock gear.Overall, the durability and audio quality of MA500 is sure to serve you well now, and even as audio technology advances. This is a great choice for casual listeners, audiophiles, and even professionals who want reliable equipment, small size, and high output. This is a sublime amplifier design that should satisfy even the most demanding listener. Product Identifiers Brand Marantz Learn More

  • Adcom GFA5400

    Adcom GFA5400

    Adcom GFA5400, bench tested, works properly Learn More

  • Rotel RB-1050

    Rotel RB-1050

    Rotel RB-1050 Ideal for demanding custom installations, the ultrastable RB-1050 combines audiophile sound quality and “bullet-proof” circuitry. A multi-mode amplifier, the RB-1050 develops 70 watts per channel for stereo reproduction. Individual sensitivity adjustments and “auto on” signal sensing circuitry allows use with a variety of distribution devices or processors. Buffered line level outputs allow multiple amplifiers to “daisy chain” from a single source. The toroid-based power supply and high damping factor ensure precise control of virtually all speakers. 12 volt “trigger” jacks and a detachable AC cord make this amplifier ideal for remote operated distributed audio systems. A front panel LED array shows clipping and protection modes for quick system analysis. Power Configurations: 2 x 70 watts Watts/Channel: all channels driven, unbridged, 8 ohm load, 20 to 20k Hz, 0.06% THD 70 watts THD (20-20,000Hz): cont. rated power one-half rated power one watt per channel 0.03%, maximum 0.03%, maximum 0.03%, maximum IM Distortion (at rated ower, 60Hz:7kHz = 4:1): 0.03%, maximum Damping Factor (8 ohms): 500 Input Sens. / Impedance: 1.0V / 33 kohms Frequency Response: 10-100kHz (±1dB) S/N Ratio (IHF A): 116dB Power Consumption: 250 watts Dimensions (W x H x D): 433 x 92 x 334mm 17 1/8 x 3 5/8 x 13 1/8" Front Panel Height: 80 mm, 3.1" Learn More

  • Hafler DH220

    Hafler DH220

    Hafler DH220, two available. Learn More

  • Boston Acoustics SA1 140 watt subwoofer amplifier

    Boston Acoustics SA1 140 watt subwoofer amplifier

    Subwoofer amplifier with built in crossover $600 retail http://www.bostonacoustics.com/US/Product/Pages/ProductDetail.aspx?CatId=HomeAudio(BostonAcoustics_US)&SubCatId=Accessories(BostonAcoustics_US)&Pid=SA1(BostonAcoustics) Learn More

  • Linn LK85 (2 available, price is for each)

    Linn LK85 (2 available, price is for each)

    Linn LK85 This model of Stereo Power Amplifier operates at 85W per channel up to 4 Ohms. The Linn amplifier is fully upgradeable, so users can update it when other components of their stereo systems are upgraded. There are four sets of speaker wiring on the Linn LK85, which makes bi-cabling convenient to put in place. The Linn amplifier is designed to conserve energy by going into sleep mode after 10 minutes of inactivity. This feature also preserves the circuitry, which can become damaged from frequently turning it on and off. The Stereo Power Amplifier is all black and is often referred to as the Black Box. There are no frills, and the basic look of the Linn LK85 allows it to go along with many other components of the stereo system without looking out of place. Key Features RMS Power at 4 Ohms x2 85 W RMS Power at 8 Ohms 62 W 115V Learn More

  • Definitive Audio SubAmp 600

    Definitive Audio SubAmp 600

    Definitive Audio SubAmp 600 in good condition Outboard amplifier for Definitive (or other) in-wall subwoofers Drives either one or two subwoofers Volume, Low-pass crossover and phase adjustments Five-way binding post speaker connectors The SubAmp 600 is a high powered amplifier and electronic crossover specifically engineered for use with the Definitive IWSub 10/10 and IWSub References in-wall subwoofers. It features two discrete high power amplifiers with simple connections in one convenient housing that fits easily on a shelf or in an audio equipment rack. It provides optimal power for effortlessly driving one or two IWSubs, in the same room or in different zones. It also provides crossover functions for the system and level, low-pass crossover frequency and phase can all be adjusted with convenient front-panel control knobs. http://www.definitivetech.com/products/subamp-600 Learn More

  • Emotiva XPA-100

    Emotiva XPA-100

    Emotiva XPA-100 used original box Audiophile monoblock (one channel) amplifier; 400 watts @ 4 Ohms; 250 watts @ 8 Ohms Fully discrete signal path, with class A/B output stage and massive power reserves Balanced and unbalanced inputs; dual full-sized speaker outputs to facilitate bi-wiring Microprocessor operating system with full fault protection and status indicators Low profile 2RU chassis lets you fit five XPA-100s in a single rack. Learn More

  • Kinergetics Subwoofer amplifier

  • Sonographe SA150 by Conrad Johnson

    Sonographe SA150 by Conrad Johnson

    Sonographe SA150 by Conrad Johnson Was $1000 retail, matching preamp available. Very musical Learn More

  • Krell Trigger Converter 12pin in to 5 pin out

    Krell Trigger Converter 12pin in to 5 pin out

    Krell Trigger Converter 12pin in to 5 pin out Learn More

  • Adcom GFA-555

    Adcom GFA-555

    Adcom GFA-555 just upgraded Learn More

  • Acurus A250

    Acurus A250

    Acurus A250 I used to sell these new back in the day. An excellent , musical entry level amplifier, Much better than an Adcom 555, smooth sounding, not bright Learn More

  • Nakamichi PA5

    Nakamichi PA5

    Classic 80's Nelson Pass designed Learn More

  • AnthemMCA2MKII


    I can convert voltage if needed.. 200 watts/channel high end sound owners manual: http://archive.anthemav.com/oldsitev1/pdf/mcalit.pdf Learn More

  • Emotiva XPA-2

  • Quad 606 amplifier

    Quad 606 amplifier

    The Quad 606 Power Amplifier is another classic amplifier design from Quad utilising their patented current dumping technology. Essentially a current dumping circuit like the Quad 606 Power Amplifier consists of a very high quality low power class A amplifier feeding a high power low quality amplifier which is used when required. The Quad 606 Power Amplifier was originally launched in 1987 and essentially was a new improved version of Quad's 405 amplifier with extra oomph and a whopping 140 watts per channel into 8 ohms whose sonic improvement compared to original Quad 405-2 was significant. The Quad 606 Power Amplifier was also very popular with professional audio people as well as audiophiles possibly because of the sheer power of this amplifier coupled with Quad's reputation for producing solid well built amplifiers. The Quad 606 Power Amplifier was discontinued in 1997 to make way for the Quad 707 power amplifier which was another current dumping design that improved slightly on the Quad 606 and was one of Hi-Fi World's recommended amplifiers at that time. Learn More

  • Tandberg 3006 amplifier

    Tandberg 3006 amplifier

    Tandberg 3006 amplifier bench tested, works great, excellent condtion with side panels Learn More

  • Kenwood LO7 monoblocks

  • Adcom GFA5500

    Adcom GFA5500

    Adcom GFA5500, very good cosmetics. bench tested Learn More

  • Bryston 4b

    Bryston 4b

    In fair condition.. some scratches Learn More

  • Dynaco Stereo 120 (3) and PAT 4 preamp

    Dynaco Stereo 120 (3) and PAT 4 preamp

    You can purchase each item individually. We have one 120 that we just replaced the coupling caps and resoldered the board as needed. That's $250 Inquire Learn More

  • Mcintosh MC250

    Mcintosh MC250

    Mcintosh MC250 nice condition Learn More

  • Sumo Andromeda II

    Sumo Andromeda II

    Sumo Andromeda II Mint, our tech just went through this and readjusting dc offset, bias 2/17 Learn More

  • Bryston 3bTHX

    Bryston 3bTHX

    with 12volt on off trigge Learn More

  • Nakamichi PA7

    Nakamichi PA7

    Nelson Pass designed, classic top of the line unit Completely recapped except 4 main big filters. (they are in great condition and rarely need recapping) Learn More

  • Bryston 4B Pro

    Bryston 4B Pro

    checked up at factory last year, with xlr jacks 250watt/channel well reviewed Learn More

  • Krell KAV-150a slim line stereo amplifier

    Krell KAV-150a slim line stereo amplifier

    We currently have two of these amplifiers, price is for each KAV-150a. They can be run as mono at 600w/ channel if you have two. Owner's manual: http://krellonline.com/assets/support/KAV150a_V980_MAN.pdf Specifications FREQUENCY RESPONSE 20 Hz-20 kHz +0.0, -0.1 dB .5 Hz-150 kHz +0.0, -3.0 dB OUTPUT POWER, each channel driven 8 Ohms 600 W (bridged) 8 Ohms 150 W SIGNAL TO NOISE RATIO 112 dB, "A" weighted DISTORTION 1 kHz 0.06% THD 20 kHz 0.25% THD GAIN 25.8 dB INPUT SENSITIVITY 1.8 Vrms INPUT IMPENDENCE 100K Ohms OUTPUT VOLTAGE Peak to peak RMS 116V 41 V 4 Ohms 300 W POWER CONSUMPTION Idle 40 W Max. 600 W DIMENSIONS 19w x 3.7h x 15.5d in. 47.5w x 9.25h x 38.75d cm WEIGHT Shipped Unit only 33 Ibs., 14.9 kg 25 Ibs., 1 1.4 kg Learn More

  • Rotel RB-1091

    Rotel RB-1091

    500 watt top of line Only one available.... manual http://www.rotel.com/content/reviews/class%20d%20amplifiers/rb1091-hifinews-ma As new in the original boxes The absolute sound review: http://www.avguide.com/review/rotel-rb-1091-monoblock-amplifier This incredible new Class D amplifier from Rotel is based upon the same ICEpower® technology as utilized in the RMB-1077. The principal difference between the two being that RB-1091 produces a prodigious 500 watts mono into 8 ohms from a 3 5/8" high chassis. Rotel’s new Class D amplifiers are incredibly powerful and stable and will provide increasing amounts of voltage and current down to 4 ohm loads. Manufacturer: Rotel Part Number: RB1091 Specification: Power Configurations (FTC): 1x500 Watts Total Harmonic Distortion (20Hz-20KHz, 8 Ohms): < 0.03% Output Peak Current: 40A Damping Factor (8 Ohms): 400 Frequency Response: 10-40 KHz (±3dB) Signal to Noise Ratio (IHF A): 118 db Learn More

  • Bryston 6b

    Bryston 6b

    Bryston 6b just in, good condition. three available price is for each Learn More

  • Krell KAV-250a

    Krell KAV-250a

    Krell KAV-250a, more than one available 250watts/channel http://krellonline.com/assets/support/KAV250A3_V992_MAN.pdf http://www.soundandvision.com/content/krell-industries-kav-250a-and-kav-250a3 Learn More

  • Audio Research D52B

    Audio Research D52B

    solid state amplifier, unused in over 20 years, very nice condition, tech checked 11/16 50 watts per channel minimum RMS (both channels operating) at 8 ohms from 1 Hz to 20 kHz with less than .25% total harmonic distortion. Typically less than .02% at rated power in midband. Approximate actual power available per channel at "clipping" (both ch. op.): 80 (4 ohms), 60 (8 ohms), 35 (16 ohms) Power bandwidth Frequency response 0.05 Hz to 100 Khz (-3 db) Input sensitivity 1.1 Volts RMS for rated power and load. Input impedance 30 Kohms (nominal). Output taps Output regulation Overall negative feedback Damping factor More than 500 at rated power and load (20 Hz to 20 kHz). (Effective internal impedance approximately .012 ohms.) Distortion Intermodulation distortion: Less than .1% at rated output (56.56 V p to p) and load (SMPTE method). THD and IMD both decrease with decreasing output. Slew rate Rise time Hum & noise Wide-band, unweighted, more than 90 dB below 50 watts at 8 ohms - power line components (hum) more than 80 dB below 50 watts at 8 ohms. Power supply energy storage Power requirements 105-120/210-240 VAC, 50/60 Hz, 600 watts maximum. 120 watts at idle. 300 watts at rated power. Other Dimensions 19" (48 cm) W x 5 ¼" (13 cm) H (standard rack mount panel size) x 10 ½ (26.7 cm) D (front panel back). Handles extend 1 ½" (3.8 cm) forward of the front panel. Weight 39 lbs. (17.7 kg) Net, 45 lbs. (20.5 kg) Shipping Learn More

  • Mark Levinson ML11



    PS Audio Stellar S350 CALL FOR PRICE! TRADE-IN'S ACCEPTED Learn More

  • PS Audio Stellar M700 mono amplifier  CALL FOR PRICE!  TRADE-IN'S ACCEPTED

    PS Audio Stellar M700 mono amplifier CALL FOR PRICE! TRADE-IN'S ACCEPTED

    PS Audio Stellar M700 mono amplifier CALL FOR PRICE! TRADE-IN'S ACCEPTED The Stellar M700 mono amplifiers are a massively powerful engine capable of effortlessly driving demanding loudspeaker loads to concert levels. Stellar’s best. A pair of these placed on any loudspeaker brings forth the lush, rich and soul-satisfying power of two completely independent power blocks with headroom to spare. One listen to a hugely loud and complex musical passage effortlessly rendered by the M700 pair and you’ll know you made the right choice. Rated at 350 Watts into 8Ω and 700 Watts into 4Ω, the M700 combines the best of two worlds: ultra linear, high-current, Class D technology for the output stage; a discrete, Class A MOSFET based Analog Cell for the all-important input stage. The M700’s rich, warm, and engaging sonic character comes from the Analog Cell. Its powerful, authoritative control over the loudspeaker stems from its high current, ultra-low impedance Class D output stage. Stellar’s design imperative was to produce a truly musical sounding power amplifier that proudly competed with any amplifier under $5,000. Its designer, PS Audio engineer Darren Myers, took the challenge and set to work on a new concept—a hybrid that would combine the best of today’s technology with time-honored techniques leveraging PS Audio’s forty plus years of experience. The results are extraordinarily musical. Even from the earliest prototype we knew the Stellar power amplifier series was going to be something special. Stellar amplifiers never draw attention to themselves, a rare quality in amplifiers of any price. After hundreds of hours of tuning, voicing, and perfectionist tweaking, we were confident the ends justified the means. Audition the Stellar M700 pair and you’ll appreciate Myer’s dedication to musical truth without compromise. Learn More

  • Krell KST100 recapped in grey

    Krell KST100 recapped in grey

    Krell KST100 recapped for you 2/17 and the other 6/17 0 hours since recap owner's manual: http://www.krellonline.com/assets/support/KST100_MAN.pdf six month parts and labor warranty Learn More

  • Krell KSA100 MK II   sold

    Krell KSA100 MK II sold

    Krell KSA100 MK II excellent cosmetics, there are some green markings in the picture which were removed. We can ship this in your desired voltage sold Description provided by highendclassics.com: The Krell KSA-100 Class A poweramplifier was the first stereo amplifier from Krell Audio Industries. At the start of the eighties Connecticut witnessed the birth of another highend audio company within its stateborders: Krell Industies. ‘Class A power to the people’ could have been one of the inspiring thoughts for Daniel D’Agostino chief designer of Krell Industries. Of course there were already some Class A designs in the domain of the power amplifier but most and probably all of them were confined to relatively small powerratings. Even the huge monaural Class A amplifier from Levinson, the ML-2’s, could only muster 30 to 40 Watts of power at 8 Ohms. Other noteworthy low power Class A designs were John Bedini’s 25/25 Class A amp and Jean Hiraga’s ‘Hiraga Classe A’. The only high power Class A amp in those days was a stereo 125 Watt Class A design from the SUMO electric company named ‘The Gold’ designed by James Bongiorno. D’Agostino envisioned and designed an array of high powered Class A amps in which the KSA-100 (abbreviation KSA stands for Krell Stereo Amplifier) was the most powerful stereo amplifier rated at 100 Watts Class A power at 8 Ohms. Technical The KSA-100 is a configuration of two completely separated amps only sharing the same huge chassis. Each amp has its own powersupply (one Avel Lindberg 1250 VA toroidal, two 40,000 uF Sprague or Mallory large cans per channel), driverboard and poweroutputsection. Another so called true dual mono design was the ML-3 from Levinson but this amp was biased in AB mode. To get rid of all the Class A generated heat from the outputsection Krell opted for forced cooling with Papst fans blowing down (the MK II version blew upwards in sync with the natural convection flow of heat) trough circular arranged heatsinks with eight TO3 encased powertransistors per channel attached to it. As a matter of fact the ‘The Gold’ from the SUMO company also used fans to cool down the amp. Using active cooling instead of natural convection kept size and cost in check because huge expansive heatsinks would be needed to drop off the 650 Watts continuous power consumption. Seven years later Krell did make huge convection cooled mono-amps as their reference series (KRS-100 & KRS-200) with the same Class A output but with a significant raise in price and weight compared to the forced cooled versions. Although Krell has always been strongly associated with Class A biasing it’s their ability to drive extremely tough loads, like the renowned amplifier killer the Apogee Scintilla (1 Ohm version) fullrange ribbonspeaker, that really illustrated the kind of DNA a Krell was made of. Only a few other amplifiers in this era, and most of them were amps with low powerratings, could drive speakers at such low impedences. Opening up the “hood ” of the amp gives you a strong visual indication of the ‘brute force’ method used to get an unflappable amp that could drive anything on the market then and today. D’Agostino’s assault on the highend poweramplifier market was very successful worldwide due to these first designs. After Levinson and Threshold, Krell established itself as a strong contender on the highend audio-market. Sound quality This range of first Krell designs redefined the meaning of bass-slam. The KSA-100 sounded much more powerful then it’s relatively modest rating of 100 Watts with acceptable levels of refinement in the middle and high regions of the frequency-spectrum. This stereo-amp is a alround workhouse that was often mated with tube preamplifiers from Audio-Research and Conrad Johnson. Not delicacy and transparancy as the best offerings from Levinson and Threshold but nevertheless highly recommend. Krell KSA-100 Type: 100 Watt class-A stereo power amplifier Introduction: 1981 Discontinued:1987 Power rating (manufacturer) 8 Ohms 100 Watt 4 Ohms 200 Watt 2 Ohms 400 Watt 1 Ohm 800 Watt 0.5 Ohm 1200 Watt Learn More

  • Krell KAV-2250 in black or silver, recapped

    Krell KAV-2250 in black or silver, recapped

    Krell KAV-2250 in black, original box/packing, very nice cosmetics... Krell manual: http://krellonline.com/assets/support/Krell%20Spreads.pdf Learn More

  • Mcintosh 2205 new restoration from original owner.

    Mcintosh 2205 new restoration from original owner.

    Mcintosh 2205 just recapped We are currently restoring two examples of the 2205 and a single 2015 amplifier right now. New caps, lubrication, bulbs,etc. Original owner on all. Learn More

  • Classe CA-300

    Classe CA-300

    Classe CA-300 Frequency response: 20 Hz to 20 KHz +/- 0.1 dB Sensitivity: 1.65 Volts in for rated output Input Impedance: 75 Kohms Output Impedance: 0.015 Ohm Gain: 29.02 db S/N Ratio: 135 kBR THD+N: 0.007% Rated Output: Stereo Mono 8 Ohms: 300 1100 Watts 4 Ohms: 600 1700 Watts Dimensions: Gross: 25" x 24 1/4" x 12 3/4" Net: 19" x 21" x 8 1/2" Weight: Gross: 100 lbs. Net: 85 lbs. Learn More

  • Krell KSA150 recapped

    Krell KSA150 recapped

    Krell KSA150 classic Krell amplifier, Great amp to get into high end audio with. 90 days parts and labor warranty Learn More

  • Conrad Johnson MF2500

    Conrad Johnson MF2500

    Conrad Johnson MF2500 used, very nice condition with original box/pac ki ng We can ship this in your desired voltage Like many Conrad-Johnson designs, the MF2500's higher performance goals have been attained through experience and the refinement of established circuits, not by some magic new topology that's claimed to solve all previously known audio-fidelity problems. Thus the input stage is a standard differential circuit executed with FETs. The second stage comprises a buffered voltage-gain amplifier, and uses bipolar transistors. It drives a regular class-A/B push-pull bipolar output stage, which is direct-coupled to the speaker. The output stage is run at quite a low idle power, which partly explains why the amplifier takes a little time to get up to speed from a cold start (footnote 1). But it does mean that the amplifier does not run too hot to touch. While some of the MF2500's technology is derived from the older MF2300A (reviewed in October 1996), the big change has been from FET to bipolar output devices. In this circuit, at least, bipolars confer greater gain stability with output load and current variations, imparting a more consistent and more dynamic sound quality. The MF2500 has high-current, resin-encapsulated Sanken power transistors: two 2SC3281 and two SA1302 devices are paralleled for each channel's output stage. These transistors have good thermal properties, high-quality electrical connections to their junctions, and are endowed with good safe-operating areas. This means the amplifier can be protected with simple quick-blow fuses. C-J favors a predominantly low-order distortion spectrum in which some second harmonic is designed to dominate the distortion residual, this in the MF2500 courtesy of the input FETs. Minimal loop negative feedback is used, in this case just 12.5dB, or approximately 4x. (Some amplifiers may run with x1000 to x10,000 of feedback.) As Lew Johnson explained, "the more the performance of the basic circuits was improved from the new MF series, the more important was the upgrading of individual component quality. Then negative feedback could be reduced yet again." The MF2500's regulation topology is of Premier quality. For example, the input stage has its own transformer tap stabilized at a voltage higher than the output stage requirement. Discrete open-loop regulators have audiophile-grade polystyrene and polypropylene capacitors. Only the main current reservoirs are electrolytic, but here there is no choice. Voltage-reference and feedback-control resistors are costly metal-foil Vishays. Six 10,000µF Nichicon electrolytics form the central reservoirs for both channels, giving a total of 30,000µF per DC supply phase and ensuring good current delivery at low frequencies. The massive EI-lamination transformer has split secondary sections to feed the various regulators. I also counted no fewer than 22 of C-J's exclusive lead-foil, large-value polystyrene capacitors, plus eight higher-value, audiophile-grade polypropylene caps. Hardware The MF2500's 3/8" alloy front panel is anodized in C-J's traditional gold, while the rest is finished in satin-black textured enamel. The baseplate can be removed to access the underside of the printed circuit board. The only control is a front-panel power switch, and there's no soft start. The heavy transformer is affixed to the right side of the chassis, while the single, external, full-size finned heatsink is to the left. The inputs are single-ended phono sockets, the outputs 5-way binding posts, all gold-plated. Thermal protection is via a self-resetting thermal trip circuit. The power cord is a captive three-core type. Listening I found I preferred to leave the MF2500 on most of the time, its low idle power proving a blessing. The amplifier also benefited from extended break-in. In some respects, the MF2500 gave an understated view of musical events—with casual listening it's possible to dismiss it on grounds of a lack of forthrightness for its rather measured pace, and an almost rich, distant presentation. Yet, over the long term, and along with its even-tempered if slightly sweet tonal balance, it was the very absence of a forced or excitable character, false hardness, or excessive attack that endeared the MF2500 to me. There was a sense of ease; aural fatigue was significantly lower than usual for this class of amplifier. Just when I thought I'd got about as much out of the MF2500 as I was going to get, it got better by stages. Elements of this sound—almost a tube experience—had been dimly evident in earlier solid-state amplifiers from C-J. But some of the necessary tonal consistency, fine textures, vitality, and clarity were not expressed well enough to make those models truly viable alternatives. Their FET output stages suffered from some variations in both clarity and tonal color with reproduced sound level, this to some degree also dependent on the loudspeaker load and the program complexity. In the case of the MF2500, two key aspects have become firmly established. First, this amplifier offered the ability to play all the way to full output with consistent quality. Second, while the MF2500 won't put C-J's Premier Eight A monoblocks out of business, or even the smaller Premier Eleven A, its sound conveyed much of the general nature of a fine tube amplifier—a classic type of moderate negative feedback, wide bandwidth, and linear, push-pull design—coupled with greater dynamic range and sheer load-driving grunt. Tonal colors were natural, never strident, thin, or hard. While the bass didn't have the kind of deeply extended impact of the biggest, most costly reference amplifiers, it was satisfying. Not only was the bass powerful—more than sufficient to do justice to cathedral organ at full stretch, and able to carry the low-frequency presence of a large symphony orchestra—it was also articulate, in terms of both detail and tune-playing. The bass also had a kind of bouncy, springy recovery that lent drive and interest to rhythm bass lines on jazz and classic rock. Through the midrange, the MF2500 had a thermionic tonal poise that appeared to have a payoff in terms of natural image depth and perspective. While the amplifier's transparency was rated fairly well, the natural tonality helped create coherent, focused well-layered images. Stage width also rated above average, if a little more like that of a fine moving-coil cartridge than a CD source. In the upper frequencies, the amplifier remained even tempered, well balanced, and even quite delicately resolved. String tone was nicely presented, and no false edge or breathiness was added to vocal sibilants. In fact, vocals in general were handled with near-tubelike quality and good clarity, and the inner harmonies of massed choir were well read, with well-maintained perspectives. Within that slightly "relaxed" temperament, the MF2500 nevertheless managed to pack quite a punch—this is a bighearted amplifier, and sounds it. As it continued to break-in and I grew more familiar with its balance, musical values asserted themselves. Pace, rhythm, and timing, plus dynamic resolution, were all rated significantly above average. On my personal scoring scale, this amplifier achieved a commendable 22 points, a significantly good result for type and price. Conclusion Conrad-Johnson's MF2500 is a successful product on many grounds. It closely approaches the classic tonal character of a fine tubed amplifier—a C-J hallmark—and holds on to that quality over a great range of output power and possible speaker loading. Not easy to accomplish. It also avoids the cheap, quick thrill of a bright, fast, forward sound. Instead, it builds on quality and depth of performance to achieve its commendable rating. Its sound is musically entertaining without being hyperactive, while its broad, bighearted approach is easy on the ears. All kinds of music were handled with equanimity. In the lab, the MF2500's high output power and good load tolerance were confirmed. The amplifier could dump up to 900Wpc into 2 ohm loads for short-term peaks, and cruise happily at around 300Wpc driving 8 ohm loads. This matches the attainment of significantly more costly amplifiers. Except for the modest channel separation at high frequencies, no test result gave rise to concern. Well-built and well-finished, with effective if old-fashioned circuit protection, the MF2500 idled at quite low power and could be safely left on for extended listening periods. This musically well-balanced powerhouse represents fine dollar value, and wins a warm recommendation. Read more at http://www.stereophile.com/solidpoweramps/1299cj/index.html#rBtsA65UcjrOiMpq.99 Learn More

  • Mark Levinson 331 sold

    Mark Levinson 331 sold

    Levinson 331, good condition. sold Learn More

  • Krell Altair

    Krell Altair

    Krell Altair Reference $5500 low profile amplifier with separate power supply from the 1990's. Original boxes Designed as a reference amplifier for apartment sized systems. Power suppy caps just recapped. Learn More

  • Crown Reference 1

    Crown Reference 1

    Crown Reference 1 ships to you in 6/2017 Learn More

  • Jeff Rowland Design Group Model 5 (last version)

    Jeff Rowland Design Group Model 5 (last version)

    A classic, musical, large, best example of a Jeff Rowland Design Model 5 stereo amplifier Learn More

  • Krell FPB200 recapped

    Krell FPB200 recapped

    Krell FPB200 freshly recapped Learn More

  • Krell S275

    Krell S275

    Krell S275 retail price is $5500 US, we can ship this in any voltage. These have never been sold to a consumer. 4 available price is for each black unit Learn More

  • Mark Levinson 23 recapped

    Mark Levinson 23 recapped

    excellent condition Mark Levinson 23 200 watt/channel amplfiier, 100V set at present, can be changed Learn More

  • Krell KSA200S

    Krell KSA200S

    Krell KSA200S, recapped, 90 day warranty. Krell box, very nice condition. Learn More

  • Krell S550i

    Krell S550i

    Krell S550i in black, excellent with six month warranty Learn More

  • Krell FPB 200c

    Krell FPB 200c

    Krell FPB200C, excellent mechanical condition, very nice cosmetics Owner's manual: http://krellonline.com/assets/support/FPB_SERIES_CAST_MANUAL_V000.pdf Learn More

  • Classe CA-400

    Classe CA-400

    Classe CA-400 available to ship 6/2017 Owner's manual: file:///C:/Users/Steve/Downloads/CA-400-OM.pdf Learn More

  • Jeff Rowland Model 201

    Jeff Rowland Model 201

    Jeff Rowland imaging, staging, and musicality in a beautifully crafted monoblock chassis capable of capturing the often elusive music and theater experience with grace and authority. Model 201 delivers a compelling musical experience with a linear frequency extension that ranges from a deep pitched bass to a textured treble, with rippling harmonics and nuanced low level resolution. This work of art, in both sight and sound, is a true Rowland. Housed in an elegant and compact chassis milled from aircraft-grade Aluminum ingots, the Model 201 monoblock power amplifier has been created to exacting JRDG artistic and engineering standards. The advanced green technology that delivers its refined performance, make the Model 201 monoblock power amplifier ideal for the most sophisticated stereo and multi-channel audio systems at a real world price. This is a used item that looks like new Learn More

  •  Varian Techron 7700 1000 watt (same as Crown Macrotech 10000) $12000 retail  per channel

    Varian Techron 7700 1000 watt (same as Crown Macrotech 10000) $12000 retail per channel

    Wickedly powerful: 5000 watts/1ohm! , these are the same as the crown macrotech 10000.. These can drive 1/2 ohm loads! 2 available, 130lbs ea Crown Techron 7700 series 1000 watt/8ohm mono amplifiers, 5000 watt into 1 ohm, 37.8 amps/2ohms The upgraded version of this model is $20000 each. user/service manual: http://www.soundstage.com/revequip/transparent_referencexl.htm crown version literature: http://www.crownaudio.com/pdf/legacy/k10684.pdf Learn More

  • Bryston 4BSST2

    Bryston 4BSST2

    Bryston 4BSST2 17" silver one owner, very nice http://bryston.com/PDF/Manuals/3B_4BSST_MANUAL.pdf Learn More

  • BAT Balanced Audio Technology VK6200  A BEAST OF AN AMP   two available, inquire  This listing is for a three channel in pic

    BAT Balanced Audio Technology VK6200 A BEAST OF AN AMP two available, inquire This listing is for a three channel in pic

    BAT Balanced Audio Technology VK6200 two channels onboard up to four available, inquire before purchasing THE ULTIMATE IN FLEXIBILITY In its two-channel configuration, the VK-6200 often outperforms reference-level audio amplifiers. In multichannel mode, it serves as an ideal solution for power bi-amping, tri-amping, or multi-room audio systems where exacting sound quality is required. Imagine matching a three-channel VK-6200 with our VK-655SE or REX II monoblocks to create a five-channel home theater. Or, apply the VK-6200 in a four-channel configuration for the ultimate in power bi-amping for two-channel stereo. Want to fully load the VK-6200 with six channels to create a standard-setting 6.1-channel theater? No problem. Such extraordinary versatility and rational upgrade path mean you’ll love the VK-6200 in every imaginable application. VK-6200 Amplifier Output per channel at 8Ω/4Ω 200W / 400W Conversion to Mono? 2,3,4,5 or 6 channels Output in Mono Configuration 8Ω/4Ω n/a Frequency Response 2Hz to 180kHz THD at full power 0.1% Input Impedance 50 kΩ Gain (Nominal into 8Ω) 23dB Balanced / 29dB Single-Ended Tube Complement n/a Number of Power Cords 1 Remote Control 12V Trigger Input & Output Power Consumption (Idle/Full Power) 80W/1800W (w/ 6 channels) Dimensions (WHD) Inches 19" x 10.5" x 23" Dimensions (WHD) mm 480 x 280 x 580 Weight 100 - 180 Lbs Learn More

  • Mark Levinson 23.5 recapped

    Mark Levinson 23.5 recapped

    Mark Levinson 23.5 fully tested, all new input caps. Learn More

  • Spectral DMA 180

    Spectral DMA 180

    see link: http://www.spectralaudio.com/dma-180spec.htm 200 watt/channel Learn More

  • McCormack DNA-750 mono amplifiers

    McCormack DNA-750 mono amplifiers

    McCormack DNA-750 mono amplifiers, mint, original boxes, Learn More

  • Mark Levinson 333

  • Goldmund Mimesis 9

    Goldmund Mimesis 9

    Goldmund Mimesis 9 invery nice condition, shipping dimensions: 25x25x16 180 lbs low fedex rates, send your postal code. Learn More

  • Cello Encore 50 monos

    Cello Encore 50 monos

    Low fedex rates to the world, very musical, we can ship this in any voltage. Just recapped 1/17. This matched serial number 0161 pair has two aftermarket gold chassis tuning dots on each (from Combak in the picture) that can simply be removed by peeling them off with your fingernail Learn More

  • Cello Trio 3 channel amplifier

    Cello Trio 3 channel amplifier

    Cello Trio 3 channel amplifier 200 watts / channel x 3 channels, rare Learn More

  • Hovland Radia

    Hovland Radia

    Hovland Radia, original factory packing Description: Solid-state stereo power amplifier: Power output: 125Wpc into 8 ohms (21dBW), 200Wpc into 4 ohms (20dBW). Input impedance: 50k ohms, unbalanced. Voltage gain: 26dB, noninverting, into 8 or 4 ohms. Frequency response: 5Hz-20kHz, +0/-0.25dB. THD at 1kHz, both channels driven: <0.1% at 8W, <0.15% at 4W. S/N Ratio: 92dB ref. 125W into 8 ohms, A-weighted. Dimensions: 18.25" (464mm) W by 7.20" (183mm) H (including feet) by 16.65" (423mm) D. Weight: 73 lbs (33.2kg). Finish: Brushed aluminum and internally illuminated acrylic. Read more at http://www.stereophile.com/content/hovland-radia-power-amplifier-specifications#ZyoGuEPtve5KKthF.99 Learn More

  • Spectral DMA250 spoken for, inquire

    Spectral DMA250 spoken for, inquire

    Spectral DMA250, used factory carton, I can voltage convert prior to shipping. INQUIRE IF STILL AVAILABLE BEFORE PURCHASING. http://www.spectralaudio.com/dma-250.htm SPECIFICATIONS DMA-250 Stereo Power Amplifier Power Output: (continuous) @ 8 ohms - 200 Watts RMS @ 4 ohms - 350 Watts RMS @ 2 ohms - 570 Watts RMS Output Current: 60 Amps peak per channel Frequency Response: ±0.1 dB, DC-150 KHz ±1 dB, DC-1 MHz ±3 dB, DC-1.8 MHz Distortion: Static: Less than 0.015% from DC to 100 KHz, typically 0.009% @ 200 WRMS/8 ohms Dynamic: 8 Tone Cluster Test 20 KHz @ 500 Hz separation; 0.01% 8 ohms; 0.015% 4 ohms Speed: Rise Time: Less than 400 nanoseconds Settling: 1.5 microseconds to -40dB Slew Rate: 600 volts/microsecond Noise: Signal to Noise: 97dB unweighted, 107dB ASA A Crosstalk: 98dB @ full power 8 ohms Input: Impedence: 100K ohms in parallel with 100 pf Sensitivity: 1.5 volts/nominal output Power Supply: Line Voltage: 100 volts, 120 volts, 240 volts (factory set) AC Voltage Range: ±10% Maximum Consumption: 1600 Watts Quiescent Consumption: 250 Watts Operating Temp: 0° to 50° Celsius range; 32° to 122° Farenheit Protection Features: DC Protection Servo: 0.5 volt range Current Limit Onset: 60 Amps Thermal Threshold: Protects at 85° Celsius, 185° Farenheit AC Main Fuses: 2 @ 2-1/2A 3 AG slo-blo, for 100 - 120 VAC 2 @ 1-1/4A 3AG slo-blo, for 220-240 VAC Size and Weight: Dimensions: 48.22cm (19")W x 18.4cm (7 1/4")H x 45.8cm (18")D Weight: 62 lbs, 28.1 KG Net Learn More

  • Cello Duet 350 stereo

    Cello Duet 350 stereo

    Cello Duet 350 stereo, bench tested Owner's manual: http://www.matthew-james.net/Customer-Content/WWW/CMS/files/Duet-350-Owners.pdf Learn More

  • Krell Evolution 302 amplifier with warranty

    Krell Evolution 302 amplifier with warranty

    Krell Evolution 302 amplifier with factory warranty, black demo, factory sealed. This will ship in your desired voltage Learn More

  • Mark Levinson 20 mono amplifiers

    Mark Levinson 20 mono amplifiers

    Mark Levinson 20 mono amplifiers in excellent cosmetic and sonic condition. Recapped 7/2017 Learn More

  • Lamm M1.1 Mono Amplifiers used

    Lamm M1.1 Mono Amplifiers used

    Lamm M1.1 Mono Amplifiers, original factory crates price is per pair, two pairs available Learn More

  • Mark Levinson 20.5 Class A mono amplifier pair

    Mark Levinson 20.5 Class A mono amplifier pair

    Mark Levinson 20.5 Class A mono amplifier pair, in excellent cosmetic and working order. One owner since new. Learn More

  • Goldmund Mimesis 9.2 mono amplifiers

  • Krell KRS100 monos

  • Mark Levinson 20.6 monoblock amplifiers

    Mark Levinson 20.6 monoblock amplifiers

    No.26: Dual monaural preamplifier with remote power supply. As supplied: one MC phono input with adjustable gain and loading; five line-level inputs. (Can be supplied with six line-level inputs, one of which can optionally be balanced; phono input can also be supplied in MM/low-gain form.) Input impedance: see text. THD: less than 0.005%. IMD: less than 0.005%. RIAA accuracy: <0.2dB. Maximum output: greater than 13V (balanced). Dimensions: (preamplifier chassis): 17.5" (445mm) W x 3" (76mm) H x 13.375" (340mm) D (add 3" for connecting plugs). Dimensions (power supply): 7.625" (194mm) W x 3" (76mm) H x 13.125" (340mm) D (add 3" for connecting plug). Weight: 30 lbs. Read more at http://www.stereophile.com/content/mark-levinson-no26-preamplifier-no20-monoblock-power-amplifier-specifications#Q2Cjj6ZY0t5MLLyI.99 Learn More

  • Cello Performance Four Chassis Mono Amplifiers

    Cello Performance Four Chassis Mono Amplifiers

    Still one of the better amps out there. Four chassis. We have replaced all the large capacitors with new Chemicons and some of the signal caps also. Product Specifications: Class of operation: Class AB1 Power Output (single amp): @8 Ohms Rated: 200 Watts Clipping: @1000 Hz >350 Watts @4 Ohms Rated: 400 Watts Clipping: @1000 Hz >700 Watts @2 Ohms Rated: 800 Watts Clipping: @1000 Hz >1000 Watts @1 Ohm Rated: 1000 Watts Clipping: @1000 Hz >1300 Watts Power Output (bridged set): @8 Ohms Rated: 800 Watts Clipping: @1000 Hz >1400 Watts @4 Ohms Rated: 1600 Watts Clipping: @1000 Hz >2800 Watts @2 Ohms Rated: 3200 Watts Clipping: @1000 Hz >4000 Watts IMD (SMPTE): 0.13% (60 Hz / 40V Output) IMD (CCIF): <0.2% THD (20 - 20000Hz): <0.1% (8 & 4 Ohms / 40 Volt Output) Frequency Response: +0 / -0.8 dB @ 20 - 20000 Hz Dynamic Headroom: 2.7 dB Channel Separation: Infinite Signal to Noise: < -105 dB (1000 Hz / 40 Volt Output) Input Sensitivity: 1.485 V (8 Ohms / 200 Watts / 40 Volt Output) Input Impedance: 1 mOhm (Non-Inverting) 5000 Ohms (Inverting) Learn More

  • Mark Levinson 33H mono amplifiers

    Mark Levinson 33H mono amplifiers

    Mark Levinson 33H mono amplifier pair in excellent condition. Just serviced 3/2017 Learn More

  • Mcintosh MC601 mono amplifiers, never sold to a consumer

    Mcintosh MC601 mono amplifiers, never sold to a consumer

    Mcintosh MC601 mono amplifiers 10/10 condition, new condition, all original, never sold. These are factory set to 220V but we can change the jumpers to set them to 120V if needed. The box has been opened to inspect, these are new. Learn More

  • Krell FPB 750mcx monos 230V in Brazil

    Krell FPB 750mcx monos 230V in Brazil

    Krell FPB 750mcx mono pair, inquire for shipping quote before ordering. The SRA custom bases are available separately for sale serials are 12800030075 and 12700030084. These amps were purchase in late 2013 after being recapped by a long time customer of mine in Brazil. The amps are owned by HPS but will ship worldwide from Brazil to your desired destination. If you're in Brazil, lucky you. Learn More

  • ASR Emitter II Exclusive 4 chassis integrated amplifier

    ASR Emitter II Exclusive 4 chassis integrated amplifier

    ASR Emitter ii Exclusive with gold heatsink option original four boxes with packing, just recapped and ready to go (not the 56 filter caps, no need to change those) six month warranty THIS SOUNDS SPECTACULAR! Learn More

  • Soulution 710

    Soulution 710

    Soulution 710, all packing. One owner of three years Matching 720 preamplifier also available separately Description: Solid-state, two-channel power amplifier. Maximum output power, both channels driven, 20Hz–20kHz, at <0.1% THD: 130Wpc into 8 ohms (21.1dBW), 260Wpc into 4 ohms (21.1dBW), 440Wpc into 2 ohms (20.4dBW). Maximum current output: 60A peak per channel. Frequency response: DC–1MHz, –3dB. THD+N: <0.0007% at 50Wpc into 8 ohms. Voltage gain: +26dB. Input impedance: 4.8k ohms (XLR), 10k ohms (RCA). Signal/noise ratio: 107dB (no ref. level given). Damping factor (100Hz): >10,000. Power/current consumption at idle: ca 200W. Dimensions: 21" (535mm) W by 10.9" (277mm) H by 18.7" (480mm) D. Weight: 176 lbs (80kg). Read more at http://www.stereophile.com/content/soulution-710-power-amplifier-specifications#Kw3o7h2CEpx9gEz0.99 Learn More

  • Mark Levinson 33 set of monoblock amplifiers

    Mark Levinson 33 set of monoblock amplifiers

    King of the HIll! 360lbs ea, one owner 440lbs each amplifier in the crate. These were top of the line for Mark Levinson and will drive any speaker. These are one owner 120V units and have the original factory crates. One set is in excellent condition. http://www.marklevinson.com/downloads/products/prod_186_634722476892713969_no33_om.pdf The Nº33 Reference Mono Power Amplifier uniquely combines extraordinary power delivery with effortless control and unparalleled refinement. Rated at 2,400W continuous into 1-ohm loads, it is the most powerful high-end amplifier in the world. The Nº33 incorporates two 2.45 kVA low noise toroidal transformers in a fully balanced power supply. In this design, there is a separate power supply (each with its own power transformer) for both the inverting and non-inverting halves of the amplifier. Twelve 39,000 μF low ESR capacitors are used in each amplifier. The power supply of each Nº33 provides almost 1⁄2 a Farad of capacitance and 1200 Joules of energy storage. Heavy oxygen-free copper bus bars enhance the efficiency of power distribution within the amplifier and eliminate variances introduced by the wiring harnesses, etc. more commonly found even in high performance amplifiers. High frequency power supply bypass is accomplished on individual PC boards by a total of 56 components of several film types. The resulting uniformly low power supply impedance seen by the various circuits within the Nº33 lays the foundation for both the massive power and the extraordinary finesse that characterizes this amplifier Learn More

  • D'agostino Momentum Mono Amplifiers

    D'agostino Momentum Mono Amplifiers

    D'agostino Momentum Mono Amplifiers, one owner since new, very light use original flight cases Please inquire with your zip code for shipping rate Learn More

  • Mark Levinson No 53 current top of the line, $50000 retail

    Mark Levinson No 53 current top of the line, $50000 retail

    Mark Levinson No 53 pair of mono amplifiers, as new condition Communication and Control Two Link2 ports (one input and one output); One Ethernet port; One 3.5mm mono (tip/sleeve) mini plug trigger input, 3-12Vdc; One 3.5mm mono (tip/sleeve) mini plug trigger output, 3-12Vdc; 3-Pin IEC standard power connector Frequency Response Within ±0.1dB from 10Hz to 20kHz Inputs One balanced XLR input; One unbalanced RCA input Input Impedance 100 kΩ (balanced); 50 kΩ (unbalanced) Rated Output Power into 4 ohms 1000W Rated Output Power into 8 ohms 500W Gain 26.8dB Power Requirements 100V~, 120V~, 230V~, 640W, factory-set for destination country Speaker Connections Two pairs of "Hurricane" loudspeaker output binding posts with banana-plug sockets (banana-plug socket not available for some models) Height 20.87 in (530mm) Width 8.42 in (214mm) Depth 20.4 in (518mm) Weight Net weight: 135 lb (61.3kg); Shipping weight: 165 lb (75kg) Learn More

  • Krell Evolution 1 reference monos  $27000/pr  SOLD

    Krell Evolution 1 reference monos $27000/pr SOLD

    KRELL EVO 1 Dan's last reference amplifiers at Krell. Four chassis, in excellent condition, factory sealed after refurb SOLD $27000/pair Learn More



    There is a level of excellence at which conventional words about quality and cost-effectiveness become meaningless. Like the very best cars, watches, and wines, and every other assault on the consumer state of the art that you can actually buy, price ceases to be an object. You choose because it is a personal passion—if not an obsession—and because you are lucky enough to be one of the handful of people who really can afford the very best.The Evolution One amplifier is the result of the unrelenting pursuit of the most realistic musical reproduction possible in the home. Immensely powerful, the Evolution One is a monaural design that features a separate power supply for each channel. Stunning aesthetics hint at the advanced amplifier circuitry housed within its walls. The 450 watt Class A circuitry features the latest advancements in Krell amplifier design including the proprietary Krell Current Mode topology and the latest versions of the Krell Sustained Plateau Bias and CAST circuitries. Learn More

  • Meitner STR55

    Meitner STR55

    Meitner STR55 , audio bargain, reviewer owned, original box/packing Learn More

  • Krell (all models)

    Krell (all models)

    We are authorized dealers for all Krell products. Please inquire about any product. Learn More

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