solid state

Krell FPB350MC monos with cast My other business is performing Krell factory service in Orange Ct. Inquire if you'd like to have them recapped also for addition $$$ Learn More

Adcom GFA5400 in and serviced 8/24 Learn More

Jeff Rowland Research Model 3 Learn More

Marantz MM7025 used excellent About this product Product Information The Marantz MM7025 is a 2-channel amplifier that is sure to boost the performance of your audio system. With a power output of 140 watts, this Marantz amplifier makes sure that you experience a power-packed performance. The 8 Hz - 100 kHz frequency response range of this 2-channel amplifier provides you with crisp highs and a tight bass response. With a signal-to-noise ratio of 105 dB, this Marantz amplifier reproduces even the minutest of musical detail with reduced background noise. The Marantz MM7025 features RCA and balanced XLR inputs to provide complete system compatibility, without the need of a preamplifier or a processor. Learn More

Crown K1 Balanced Current Amplifier (3 available) as of 9/24 consumer used only Crown K1 Amplifier at a Glance: Balanced Current Amplifier technology ensures thermal stability without a fan! Delivers 350 watts at 8 Ohms, up to 1500 watts (bridged) at 4 Ohms Incredibly flat frequency response for compromise-free audio Massive power with one tenth the heat! The K1 amp from Crown is the first amplifier to take advantage of Crown's new Balanced Current Amplifier technology. This technology yields extremely efficient power amplification while generating just one-tenth the heat of conventional amplifiers. In fact, the powerful K1 Amplifier can deliver an amazing 750 watts per channel into 2 Ohms (and that's a very solid 2 Ohms)! As a result the amp can put out clean, uncolored power without the use of a fan. No fan means the K1 runs quietly and cleanly, takes up less space in a rack and requires less maintenance. The K1 also boasts advanced circuitry protection that guards against DC, mismatched loads, internal faults and high frequency overloads. Crown is so confident of the K1's stability that it's backed by a three-year no fault warranty! Power to spare, no matter what your configuration The Crown K1 Amplifier is rated to deliver 350 watts per channel at 8 Ohms, 550 watts into 4 Ohms or 750 watts per channel into 2 Ohms. In addition, in bridged mode the K1 has a capability of 1100 watts at 8 Ohms or 1500 watts at 4 Ohms - all while running without a fan! The K1 is cool, clean and quiet. Legendary Crown frequency response Crown amps have a long history of providing crystal-clear audio response in critical listening situations, and the K1 Amplifier is no exception. Flat frequency response: (+/- .25 dB) from 20Hz to 20kHz ensure you get out of the K1 exactly what you put into it! Crown K1 Amplifier Features: Soft Start (Keeps amp from drawing large currents when first turned on) Switchable Input Sensitivity (1.4V or 26dB) Mono mode switches: Bridged, Y (parallel) or both (for daisy chaining) Balanced XLR and 1/4" inputs 5-way binding posts Channel 1 and Channel 2 gain controls with notched settings LEDS: Thermal (Warns of need to dissipate heat), Clip (Warns of distortion in the amp), IOC (Input / Output Comparator: Warns of distortion at 1/30th the level of clipping by comparing the actual waveforms of the input to the output), Signal (glows when output signal is present), Enable (Indicates Power status) Frequency Response: +/- .25 dB for 20Hz - 20kHz Power Output (per Channel): 750 watts into 2 Ohms, 550 watts into 4 Ohms, 350 watts into 8 Ohms Bridged (mono) power: 1500 watts at 4 Ohms, 1100 watts at 8 Ohms Signal-to Noise (A Weighted): >100dB below rated power Damping Factor: >3000 from 10 to 400Hz Input Impedance: Nominally 20KOhms balanced, 10KOhms unbalanced Passive convection cooling allows amplifier to drive 2 Ohm load at 8db into clip in 104 degree environment! Power Supply can configure to 100, 120, 200, 220, 230, 240, 250 VAC at 50 or 60 Hz Learn More

Mcintosh MC2505 in beautiful condition, one owner in 3/23 New box and packing ordered from Mcintosh 3/23 optional wood case pictured $350 additional plus shipping Learn More

Crown Reference 1 in service 9/21 Inquire before purchasing Reference I (120 V, 60 Hz models) The Crown® Studio Reference I power amplifier shall be a solid-state two-channel model employing multi-mode (AB+B) grounded bridge(TM) output circuitry with a variable impedance (VZ) power supply for each channel. The outputs shall be switchable as stereo, bridged-mono or parallel-mono modes of operation. The bridged-mono mode shall bridge the outputs to provide increased output voltage. The parallel-mono mode shall parallel the outputs to provide increased output current. The output impedance of each channel shall be less than 10 milliohms in series with less than 2 microhenries in stereo mode. The variable impedance power supplies shall reduce unnecessary voltage across the output devices by automatically switching to a parallel mode when less voltage is required by the output circuitry and to a series mode when more voltage is required. The amplifier shall contain protection circuitry which limits the drive level placed on the output devices before their SOA (Safe Operating Area) is exceeded. This protection circuitry shall calculate the instantaneous voltage across and current through the output devices while factoring in their simulated junction temperatures to predict how close they are to their operating limits. This protection will be called “ODEP.” The amplifier shall contain controlled slew-rate voltage circuitry to protect it against radio frequency interference burnouts. It shall also be protected from current overload at its output stage. The slew rate of the amplifier shall be greater than 30 volts per microsecond in stereo mode. The amplifier shall temporarily go into a stand-by mode if its power transformer becomes excessively hot and shall automatically resume normal operation once it has cooled to a safe operating temperature. Front-panel controls shall include an enable on/off switch and a detented input level control for each channel. Rear-mounted controls shall include a ground lift switch to isolate the signal ground from the chassis ground, a switch which selects between stereo, bridged-mono and parallel-mono modes of operation and a reset switch for the AC mains circuit breaker. Internal controls shall include an input sensitivity switch to select between 0.775 V, 1.4 V or a fixed voltage gain of 26 dB for full rated output. A Crown P.I.P. and P.I.P.2-compatible expansion connector shall be provided behind an access panel in the rear to accept auxiliary input modules. It shall be fully compatible with the Crown IQ System. Front panel indicators shall include an amber power enable indicator, an amber ODEP protection system indicator for each channel which shall normally be illuminated to confirm the availability of reserve thermodynamic energy and which shall dim in proportion to limiting when the power demands of the output stages have been exceeded, a green IOC indicator for each channel, and a green Signal indicator for each channel which shall normally flash at moderate intensity to show the presence of an audio signal. The power amplifier shall meet or exceed the following performance criteria. Input sensitivity for rated output: 26 dB voltage gain (unbalanced). Rated FTC output in stereo mode with less than 0.1% THD: 780watts per channel (20 Hz to 20 kHz) into 8 ohms. Hum and noise: at least 120 dB (A weighted) below full rated output power. Phase response: +5 to –15 degrees from 20 Hz to 20 kHz at 1 watt. Frequency response: 20 Hz to 20 kHz, 0.1 dB at 1 watt into 8 ohms per channel in stereo mode. Damping factor: greater than 20,000 from 10 to 200 Hz into 8 ohms. Intermodulation distortion (SMPTE): less than 0.005% from full bandwidth power to 78 watts rising linearly to better than 70 dB at 20 kHz. Harmonic distortion: less than 0.02% at rated low-distortion 1 kHz power. The amplifier shall be safe when driving any kind of load—even highly reactive ones. The power requirements shall be 120 VAC at 60 Hz. At idle, the amplifier shall draw 90 watts or less. The amplifier chassis shall be constructed of steel with a durable black finish and shall be designed for flow-through fan-assisted ventilation from the front panel to the side panels. The amplifier shall have an aluminum front panel with super-gloss Imron finish and Lexan overlay. The dimensions of the amplifier shall allow for 19 inch (48.3 cm) EIA standard (RS- 310-B) rack mounting. The amplifier shall be 7 inches (17.8 cm) tall, 16 inches (40.6 cm) deep behind the rack-mounting surface, and 2.75 inches (7 cm) in front of the rack-mounting surface. The amplifier shall weigh 60 pounds, 11 ounces (27.6 kg) and shall have a center of gravity approximately 6 inches (15.2 cm) behind the front panel. The amplifier shall be designated the Crown Studio Reference Learn More

BelCanto REF600 mono amps 300 watts/channel Learn More

Bryston 4b thx version Just recapped for like new sound and reliability Learn More

Devialet Expert 200, original box/packing, excellent condition Learn More

JBL S400 stereo power amplifier Power output: 200 watts per channel into 8Ω (stereo), 400W into 8Ω (mono) Frequency response: 10Hz to 70kHz Total harmonic distortion: 0.02% Damping factor: 120 Input sensitivity: 1V Signal to noise ratio: 105dB Speaker load impedance: 4Ω (minimum) Dimensions: 5.5 x 19 x 16.5 inches Weight: 45lb Learn More

Balanced Audio Technology VK-250, excellent condition Learn More

Audio Research D400 MKII 200 watts/channel $5995 retail In repair 10/24 inquire as to status we have three of them. Power output 200 watts per channel into 8 ohms, 400 watts per channel into 4 ohms. Power bandwidth D400: (-3dB points): 0.01Hz-160kHz D400 MKII: (-3dB points) 4Hz to 100 kHz Low level: (-3dB points) 0.01Hz to 160kHz. Frequency response Input sensitivity D400: 1.91V RMS for rated output (26.4 dB gain) unbalanced or balanced D400 MKII: 2.0V RMS for rated output (26dB gain) unbalanced or balanced Input impedance D400: 150K ohms normal or invert, 300K ohms balanced differential D400 MKII: 57K ohms normal or invert, 114K ohms balanced differential Output taps Output regulation 0.06dB 8 ohm load to open circuit Overall negative feedback D400: 9.3dB D400 MKII: 9.7dB Damping factor 150 Distortion Slew rate 50V/µs Rise time 1.0 µs Hum & noise D400: Less than 150 µV RMS (106dB below rated output IHF A-weighted) D400 MKII: Less than 220 µV RMS (105dB below rated output IHF A-weighted) Power supply energy storage 270,000 µF Power requirements 105-125VAC 60Hz (210-250VAC 50 Hz) 760 Watts at rated output (200WPC 8 ohms). 1200 watts maximum (400WPC 4 ohms), 220 watts idle Other Peak output current: 60 Amp peak into 1 ohm Input polarity: Non-inverting at normal inputs. Balanced pin 2+ Dimensions 19" (48 cm) W (standard rack panel) x 9" (22.8 cm) (8¾" (22.2 cm) panel + ¼" feet (0.6 cm) H x 17¾" (45.0 cm) D (front panel back). Handles extend 1 and 5/8" (4.1 cm) forward of the front panel. Handles extend 1 and 5/8" (4.1 cm ) behind rear panel Weight D400: 73 lbs. (33.2 kg) Net, 90 lbs. (41.0 kg) Shipping D400 MKII: 76 lbs. (34.5kg) Net, 94 lbs. (42.7 kg) Shipping In service 11/20 Learn More

Naim NAP135 pair of monos 6 pieces available as of 9/24. These will be recapped before sending to you Learn More

Marantz 15 Learn More

B&K Sonata M200 mono pair Learn More

Thule Audio Spirit PA100 power amplifier Thule Audio is a Danish company, specializing in audio equipment, ranging from basic entry level models, to models which are High End stuff. The product line is well thought out, and as we shall see, very rationally conceived and executed. For other reviews of Thule Audio products, look over the site. Both cases are virtually identical, and share the overall look of the entire Thule Spirit range. They are made of uncommonly thick, heavy and well finished cases, while front panels are made from 8mm thick aluminium, machined so that they have a gentle slope. In the center, one will find a "gold" knob in case of the preamp, and a decoration in case of the amp. The preamp has an alphanumeric display above the knob, which provides the user with all relevant information on power on, volume and input status in red LEDs. All this is fully remote controllable, and a remote control unit is supplied. The power amp is a very simple affair, with only a red LED power on indicator on its front side. Both units have rocker power on/off switches at the back, as they're intended to be left in standby mode all the time. [Thule PR 100 inside view] Both units share much more common componentry that I would have imagined. Both use toroidal power supplies, where the amp's toroid is rated at 500VA, while the preamp's toroid is rated at 300VA. No, you're not seeing things, it's not a typo error, I did say 300VA. That's enough for a 2x75W/8 Ohm power amplifier, let alone a simple preamp. In fact, the preamp is EXACTLY the same as the IA60 integrated amplifier, minus the power amp circuitry and heat sinks. Put another way, the preamp consists of the preamp section of the IA60 integrated. Hence the 300VA toroidal transformer - that's what they use in IA60 (see review on this site). The power amp, on the other hand, is once more the same board, but minus the preamp circuitry and with heftier power supplies - bigger transformer, and 4x10.000uF capacitors, instead of just 2x10.000uF. This is no accident, this is rational thinking. Use the same board, use the same case, use the same power supplies and you increase the numbers of your serial production, thus pushing the cost per unit down. The only thing that spoils the show is the preamp's price - it's simpler than the integrated model, but it's not only not cheaper, it's actually somewhat more expensive. That is most odd, I must say - probably for "complex marketing reasons" (a phrase I first heard in the early seventies, and it's gotten worse since then). You still have 5 line level inputs, with no option for a phono RIAA board of any kind. You still don't have a headphone output - somebody should inform the Scandinavian audio industry that headphones have been invented some decades ago, they seem to have collectively overslept that event. As usual, all input and output sockets are gold plated. Like elsewhere in Thule's product portfolio, volume and balance are controlled by a ladder of laser trimmed resistors, contained within an LM1792 digital volume control, a good point - no mechanics, no wear and tear, no aging, unparalleled precision. The amp is rated at 2x100W/8 ohms and 170W/4 Ohms - that should be enough for most of us. It has an RCA Cinch and a balanced XLR input, just as the preamp has the same outputs. Acting on logic and Thule's recommendation, I used balanced lines to link the two, except when using other units. Learn More

Krell KSA150 fresh recap on one 12/23 2 available the other not recapped excellent cosmetics on that one. Learn More

Dynaco ST 150 power amplifier The Dynaco Stereo 150 is a basic two channel power amplifier employing all silicon semiconductors. They include 24 transistors, 2 zener diodes, 16 diodes, and 2 thermal sensors. The output circuitry is of the full complementary symmetry design. The entire amplifier, except for an input network, is direct coupled. It's measured distortion levels approach the threshold of much laboratory test equipment, not only at the commonly specified full power ratings, but more importantly at very low power outputs as well. This is the result of circuit techniques which eliminate any discernible crossover notch at low levels, and contributes to the Stereo 150's freedom from listening fatigue. It's accurate, uncoloured sonics have been achieved on a wide variety of loudspeaker loads, including electrostatics and multiple drivers with complex crossovers. The design of a very fine power amplifier implies the necessity of several protection techniques for the amplifier, and for the speaker load. In addition to the AC line fuse, four separate B+ fuses are supplied. Electronic volt-amp limiting ensures safe operation of the output transistors, and a thermal sensor mounted directly on each output stage reduces the input if high temperature occurs. An unusually large radiating area for the heat fins, which are coupled to an aluminium back panel, form a highly efficient heat sink. Speaker fuses protect the load. The Stereo 150 has been designed as two independent 75 watts (at 8 ohms) amplifying channels with a common power supply having a high degree of inherent regulation. In addition, where higher powers or higher volt-amp capabilities are required for lower load impedances, easy internal restrapping permits monophonic operation for 150 watts output (at 8 ohms). An accessory kit is planned at additional cost for two output meters and meter switching, which includes alternative inserts for the front panel. Specifications Power output: 75 watts per channel into 8Ω (stereo) Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.25% Damping factor: 50 Input sensitivity: 1V Signal to noise ratio: 95dB Speaker load impedance: 4Ω to 16Ω Semiconductors: 24 x transistors, 2 x zener diodes, 16 x diodes, 2 x thermal sensors Dimensions: 14.5 x 13.75 x 7 inches Weight: 29lbs Learn More

Rotel RB-1582 200 watts/channel Learn More

Triad Powersub AmpliflierTriad benchtested 5/18 good Learn More

Adcom GFA-535ii bench tested 5/18 Learn More

NAD 916 Amplifier missing power button, works fine Learn More

ADS A2 bench tested 5/18 good Learn More

Mark Levinson ML9 in beautiful condition we can convert to a voltage other than 120v if you need Learn More

Burmester 909 IIIa stereo sold Learn More

Krell KMA 100 mono pair (Krell factory recapped 2025) very nice condition I run Krell factory service with my other business. Inquire for freight options Learn More

Krell Audio Standard 2 recapped approximately 3 years ago must ship freight inquire before purchasing please Learn More

Krell MDA400s mono pair just recapped, with meters in boxes Very rare version of the Krell KSA200s KSA300s series in mono Inquire for trucking rate Learn More

Mark Levinson 331 recently serviced by factory authorized center Learn More

Mark Levinson 332 in service 5/24 inquire Learn More

Krell KAV-250a stereo amplifier Learn More

Audio Alchemy DPA-2 black NEW 325 watts/channel Factory sealed new $2500 retail Power Output/Channel (1% Thd+N, 1 Khz): (Stereo 325W/ch @ 4Ohms) / (Mono 625W @ 8Ohms) Frequency Response: 5hz-20khz +/- 0.2dB Nominal Thd+N (1 Watt Into 8Ω): 0.003% Signal-to-Noise Ratio (1 Khz): 94dB Input Impedance: RCA=12K, XLR=19K Output Impedance: 0.03 Ohms @ 1KHz Channel Separation (1 Khz): 70dB @ 1KHz / n/a Gain: Stereo 24dB/30dB – Mono 18dB/24dB Inputs: Unbalanced RCA, Balanced XLR Outputs: Binding post 5-way Available Finishes: Black Dimensions (HxWxD) In: 02.00 x 17.50 x 15.00 including jacks Net Weight: 14.00 lbs The Alchemy DPA-2 Power Amplifier is about dynamic musicality, thanks to design that combines Class A circuit topology composed of discrete FETs and a linear power supply using a toroidal transformer. The pure analog input stage preserves all the detail and nuance of the most delicate passages. The Class D output stage with switching power supply results in impressive output combined with cool-running efficiency. Learn More

Meridian G57 amplifier ( 3available) as of 4/23 Learn More

B&K ST1400 MK II good cosmetics Learn More

PA1230R Integrated Amplifier At a time when many manufacturers are using microprocessor technology to bury functions below several software layers so you need to have an owners’ manual close at hand if you want to access them, T+A has delivered an amplifier where each function has its own control, properly and clearly labelled, on the front panel. This necessarily means there are quite a few knobs and buttons, but rarely has an amplifier been so easy to use. This is especially the case because the PA1230R is one of the very few amplifiers available that allows you to adjust bass and treble individually for the left and right channels. Learn More

Krell KAV-250a factory serviced (I am Krell factory sevice in CT) in 2025 Learn More

Krell MRA mono amplifiers. The best Krell ever made. Only 50 were made I read somewhere. These were $150,000/pair when new. price is for both We have the crates. They are at the Krell factory and will ship there directly to your door after being recapped. As of 1/22 because of the worldwide pandemic situation the capacitors we prefer using are on backorder. So you may purchase these but we don't have an exact delivery date These are the best Krell amplifiers ever made. Incredible size and weight 770 lbs each in the crate. serial 10199070016 Learn More

Audiophile-grade 2 channel amplifier High-performance Class AB design Discrete high-current, bipolar output transistors Learn More

Krell FPB350m single mono Learn More

Mcinttosh MC2002 200 watt channel must truck , if not local box must be ordered from Mcintosh Learn More

Mark Levinson 532h This one recently came back from factory service Learn More

Linn Klout 2 available as of 9/24 in original box Learn More

Jeff Rowland Model 7 These are later versions and were just recapped 11/24 one pair The shipping must be quoted. Each amp is approximately 130lbs boxed. Please send you postal code. Learn More

Krell KSA250 with KSA300s internal boards overhaul completed 8/23 Learn More

Cello Performance II amplifiers We will recap the amplifiers before shipping. In very good to excellent condition, one owner since new Inquire for freight options Learn More

Mark Levinson 23.5 serviced 5/25 pics will be uploaded when complete recapped Learn More

Straightwire Virtuoso H (various lengths possible) 24' pair factory will cut to your desired length) $4560 retail Learn More

Rotel RB-1091 Mono Power Amplifier Black Power output: 500 watts into 8Ω (mono) Frequency response: 10Hz to 40kHz Total harmonic distortion: 0.03% Damping factor: 400 Gain: 27.2 dB Input sensitivity: 2.2V Signal to noise ratio: 118dB Dimensions: 432 x 92 x 407mm Weight: 7.8kg Learn More