Power Amplifiers

Cinenova 7 seven channel in 4/22 Learn More

Mcintosh MC7150 sold ? 4/23 Learn More

Threshold SA/3 50watt/channel Stasis Pure Class A Power Amplifier. This amplifier, designed by Nelson Pass and Built in the USA by Threshold employs pure Class A circuitry at every stage - there is no corrective feedback loop Learn More

Classe Sigma 5 $5000 USA retail nformation The Sigma series AMP5 is a 200W/Ch five-channel amplifier derived from the AMP2, but with necessary part and layout changes to accommodate its five-channel architecture. Like the AMP2, it utilizes switching technologies for both power supply and amplification stages. A Classé-designed switch mode power supply with Power Factor Correction makes over 1,000W of clean and stable power available while being both compact and efficient. A new class D amplifier topology provides wide dynamic range, smooth and extended frequency response and rich harmonic detail to yield stunning sonic performance. The efficiency of class D adds efficiency, low heat dissipation and relatively small size to the list of the AMP5’s attributes. The Sigma series AMP5 is a 200W/Ch five-channel amplifier derived from the AMP2, but with necessary part and layout changes to accommodate its five-channel architecture. Like the AMP2, it utilizes switching technologies for both power supply and amplification stages. A Classé-designed switch mode power supply with Power Factor Correction makes over 1,000W of clean and stable power available while being both compact and efficient. A new class D amplifier topology provides wide dynamic range, smooth and extended frequency response and rich harmonic detail to yield stunning sonic performance. The efficiency of class D adds efficiency, low heat dissipation and relatively small size to the list of the AMP5’s attributes. Specifications Details All tests un-weighted and 20Hz - 20kHz measurement bandwidth used. Frequency response 10Hz - 20kHz, -1dB into 4Ω Output power 200W rms into 8Ω All channels driven 400W rms into 4Ω Any two channels driven* Harmonic Distortion 0.018% @ 1kHz All channelsdriven to 1/8th power into 8Ω Peak Output Voltage 113V peak to peak, 40V RMS no load 113V peak to peak, 40V RMS into 8Ω Input Impedance 100kΩ Balanced / 50kΩ SE Voltage gain 29 dB Input level at clipping 1.4Vrms Balanced/SE Intermodulation Distortion >80 dB below fundamental into 8Ω SE Signal to Noise Ratio -100 dB at peak output into 8Ω (AES17) Rated power consumption 200W @ 1/8th power into 8Ω Mains voltage 100V - 240V, 50/60Hz Overall Dimensions Width: 17.00" (433mm) Depth (excluding connectors): 14.57" (370mm) Height: 3.75" (95mm) Net weight 23.1 lb (10.48 kg) *each channel supports 400W output into 4 ohms but the AC Mains/power supply cannot support all channels driven simultaneously at this level, which would require over 2,500W and only occur under a special test condition. Every channel easily drives lower impedance loads. Learn More

Goldmund VSR Mononoblock Power Amplifiers Silver Faceplate Great Condition Learn More

Mark Levinson No. 27 Stereo Power Amplifier Power output: 100 watts per channel into 8Ω (stereo) Frequency response: 4Hz to 122kHz Total harmonic distortion: 0.1% Gain: 26 dB Dimensions: 444.5 x 407.8 x 185.6mm Year: 1989 75Lbs Learn More

Krell KSA80B One owner all original excellent condition We can recap for $500 additional if desired before shipping. Later balanced version Learn More

Power output: 100 watts per channel into 8Ω (stereo) Frequency response: 1Hz to 100kHz Total harmonic distortion: 1% Damping factor: 11 Gain: 23.5 dB Input sensitivity: 1.9V Signal to noise ratio: 95dB Speaker load impedance: 4Ω to 8Ω Valve complement: 8 x 6550C, 8 x 6922 Dimensions: 483 x 222 x 495mm Weight: 29.5kg Learn More

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. IN REPAIR Learn More

Quicksilver Mono 100 unused since 2014 pair http://quicksilveraudio.com/wp-content/uploads/2017/07/Mono100Manual.pdf in 11/21 Learn More

Goldmund A2 modules (original, new gold) I purchased these sequential modules from the former Goldmund distributor they are a NOS (new old stock pair) Learn More

Audio Research SD135 excellent condition, original box $5000 retail in 1/23 Learn More

Power output: 250 watts per channel into 8Ω (stereo), 1000 watts into 8Ω (mono) Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.1% Input sensitivity: 1.6V Signal to noise ratio: 100dB Speaker load impedance: 4Ω (minimum) Dimensions: 19 x 20.75 x 8 inches Weight: 65lbs Learn More

Sunfire Cinemagrand Signature 400, new capacitors in the power supply Learn More

Conrad Johnson Premier 11a We purchased this Premier 11a no tubes buy yourself some new ones and no need to worry about what would be in them Premier Eleven Vacuum Tube Amplifier Essentially a scaled down, stereo version of the Premier Eight, the Premier Eleven delivered 70 watts per channel from a single pair of 6550 output tubes. The Premier Eleven used only the finest component parts in all stages including the power supply. The power supply used only polypropylene and “cjd” polystyrene capacitors as opposed to the traditional deployment of electrolytics. The main storage reservoir used polypropylene capacitors with polystyrene shunts. The Eleven-A added a noise filter on the bias indicator circuit, first employed in the Premier Twelve. Features: 5-way binding post speaker connectors one pair of inputs two plate fuses power switch Replacement Tube Sets: RTPR11 or RTPR11XS V1 & V2: 5751 | V3 & V4: 6FQ7/6CG7 | V5-V8: 6550 Premier Eleven, Eleven-A: V5-V8: You could use kt120 tubes also without any modificaton but the cage will not fit because of the taller tube size. (I always thought they looked much better without the cages on anyway) Specifications: Power Output ­ Ultralinear Operation: 70 watts per channel RMS at 4, 8, or16 ohms both channels driven from 30Hz to 15kHz with no more than 1% THD or IMD. Power Output ­ Triode Operation: 30 watts per channel RMS at 4, 8, or16 ohms both channels driven from 30Hz to 15kHz with no more than 1.5% THD or IMD. Frequency Response: 20Hz to 20 kHz, +0, -.1 dB Input Sensitivity: 0.9 volts to rated power Hum & Noise: 96 dB below rated power Mechanical: Dimensions: 17.5W | 7.25H | 15D inches Weight: 48 lbs. Learn More

These have the upgraded black circuit boards with high end caps from symphonic line, high quality parts internally. these are cut and paste from the web specs I found. Hope they are accurate 1 x 110 Watts RMS @ 8 Ohms (each) 2 Ohm load stable Class A/AB 1 - 600,000 Hz frequency range 120,000µF memory (each) 120 amps current delivery <0.04% THD (not audible) >800 continuous damping factor Input impedance 22K ohms DC offset <1 mV RCA inputs 400 VA Plitron transformer (each) Sanken Epitaxial Planar Transistors 2SA1216 & 2SC2922 Anti vibration dual thickness PCB Power consumption when idle ±30Watts 4 internal fuses 250V/6.3A, 5x20mm, fast blow 18"W x 16"D x 4 1/4"H weighs 32 pounds. Learn More

Lexicon LX-7 $6000 retail in silver excellent cosmetics https://hometheaterreview.com/lexicon-rx-7-multi-channel-power-amplifier-reviewed/ Learn More

Fourier Triomphe OTL large tubed amplifier sold ? http://www.one-electron.com/Fourier.html 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

Red Rose M1 by Mark Levinson Hook up with your favorite surround processor or used to biamp. Low shipping rates to the world. Learn More

sold 12/23 another kav500/5 available 1/24 Krell KAV-500/5 Krell KAV-500 Multichannel Amplifier 100 Watts/Channel into 8 Ohms, 200 Watts into 4 Ohms 400 Watts/Channel bridged (2 channels) Mfr FR 20 Hz - 20 kHz ± 0.5 dB THD < 0.03% Input Impedance 100 kOhms Size: 6.25" H x 19" W x 17" D Weight: 47 pounds Learn More

Krell KAV250-A/3, overhauled, new capacitors so they sound the way they should, 6 months parts and labor warranty, KAV-250a Stereo Amplifier Learn More

Mcintosh 2205 just recapped replaced amp coupling caps Original owner on all. Wood case $350 plus shipping extra. Power output: 200 watts per channel into 8Ω (stereo), 400W into 8Ω (mono) Frequency response: 10Hz to 100kHz Total harmonic distortion: 0.1% Damping factor: 16 Input sensitivity: 0.75V Signal to noise ratio: 95dB Speaker load impedance: 1Ω to 8Ω Learn More

Perreaux PMF5150B Learn More

Damping factor into 8 36 Signal to noise ratio ref 100W 8 A-weighted 111dB Signal to noise ratio ref 1W 8 A-weighted 91dB Input signal for clipping 1V RMS Peak current into 1 (1kHz 1mS) +/-28 amps peak (780W peak power) Burst power 2 300 Watts 2 @1% THD+N (1kHz for 20mS, repeat 500mS IHF) Audio Inputs 2 x True balanced via XLR, 47k 34k singled ended via legacy adaptor lead Audio Outputs Crosstalk 60 dB THD + N at 2/3rds full power 8 @1kHz (0.013%) Power Output 100 Watts 8 @0.1% THD+N (100W @0.1%) 190 Watts 4 @1% THD+N Frequency Response -3dB @ 1.4Hz to 100kHz Gain +29 dB Physical Weight 37.04lbs (16.8kg) Dimensions (HxWxD) 35/8x17x121/2" (9.15x43.2x31.75cm) Power Mains Supply 115V or 230V, 50/60Hz Power Consumption Passive consumption: 26W (idle) Standby consumption: <0.5W Product Type Type Power Amplifier Learn More

Krell KAV-2250 silver with box last one, inquire to make sure still available Learn More

Parasound Halo A21 2 Channel Power Amplifier Continuous power output: 250 watts RMS x 2, 20 Hz - 20 kHz, 8 Ω, all channels driven 400 watts RMS x 2, 20 Hz - 20 kHz, 4 Ω, all channels driven 750 watts RMS x 1, 20 Hz - 20 kHz, 8 Ω Current capacity: 60 amperes peak per channel Power bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 watt Total harmonic distortion: < 0.2 % at full power IM distortion: balanced 16 V rms < 0.04 % Slew rate: > 130 V/µsecond Dynamic headroom: > 1.5 dB Interchannel crosstalk: > 80 dB at 1 kHz; > 63 dB at 20 kHz Input sensitivity: 1 V for 28.28 V, THX Reference Level Input impedance: 33 k Ω unbalanced; 66 k Ω balanced S/N ratio: 112 dB, input shorted, IHF A-weighted Damping factor: > 1100 at 20 Hz Voltage: 110V - 120V Dimensions: 17-1/2" w x 7-5/8" h x 20" d, 7" h without feet Net weight: 60 lb. Learn More

Nakamichi Stasis PA 7 Stereo Power Amplifier Power output: 200 watts per channel into 8Ω (stereo) Frequency response: 20Hz to 20kHz Total harmonic distortion: 0.1% Damping factor: 60 Input sensitivity: 2V Signal to noise ratio: 120dB Semiconductors: 16 x output transistors per channel Dimensions: 435 x 200 x 421mm Weight: 27kg Learn More

Krell KAV-500/5 Krell KAV-500 Multichannel Amplifier 100 Watts/Channel into 8 Ohms, 200 Watts into 4 Ohms 400 Watts/Channel bridged (2 channels) Mfr FR 20 Hz - 20 kHz ± 0.5 dB THD < 0.03% Input Impedance 100 kOhms Size: 6.25" H x 19" W x 17" D Weight: 47 pounds Price: $4,500 5 Channels ($3,000 2 Channel, $500 Per additional channel) Learn More

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

Mcintosh MC7106 six channel beautiful condition factory box ordered 12/1/23 can ship when arrives. Learn More

Bryston 4B e 4be (commercial version , balanced looks like 4bst to me) 2 available 2/22 used in a home only Learn More

Plinius 8200P MKII stereo amplifier (4 available) Learn More

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

Krell 5 channel Showcase amplfiier In silver or black capacitors have been upgraded so this sounds like new and Krell modification performed to eliminate high standby idle (allowing for longer lifespan) performed. Will ship in your desired voltage. Krell box/packing. Excellent condition We are authorized Krell dealers Showcase 7 Showcase 6 Showcase 5 FREQUENCY RESPONSE 20 Hz to 20 kHz 20 Hz to 20 kHz 20 Hz to 20 kHz +0 dB, -0.15 dB +0 dB, -0.15 dB +0 dB, -0.15 dB .2 Hz to 95 kHz .2 Hz to 95 kHz .2 Hz to 95 kHz +0 dB, -3 dB +0 dB, -3 dB +0 dB, -3 dB SIGNAL TO NOISE RATIO >110 dB >110 dB >110 dB “A” WEIGHTED GAIN 26.2 dB 26.2 dB 26.2 dB TOTAL HARMONIC 1 kHz < 0.03% 1 kHz< 0.03% 1 kHz < 0.03% DISTORTION (THD) 20 kHz < 0.20% 20 kHz< 0.20% 20 kHz < 0.20% INPUT IMPEDANCE 45 kOhms 45 kOhms 45 kOhms INPUT SENSITIVITY 1.55 Vrms 1.55 Vrms 1.55 Vrms OUTPUT POWER 8 Ohms 125 W 8 Ohms 125 W 8 Ohms 125 W EACH CHANNEL DRIVEN 4 Ohms 250 W 4 Ohms 250 W 4 Ohms 250 W OUTPUT VOLTAGE Peak to Peak 90 V Peak to Peak 90 V Peak to Peak 90 V RMS 32 V RMS 32 V RMS 32 V POWER CONSUMPTION Stand-by 90 W Stand-by 80 W Stand-by 70 W Idle 150 W Idle 130 W Idle 110 W Max. 1600 W Max. 1400 W Max. 1200 W INPUTS 7 single-ended 6 single-ended 5 single-ended via RCA connectors via RCA connectors via RCA connectors 7 balanced 6 balanced 5 balanced via XLR connectors via XLR connectors via XLR connectors OUTPUTS 7 channels via 5-way 6 channels via 5-way 5 channels via 5-way binding posts binding posts binding posts REMOTE CONNECTORS 12 VDC Out 12 VDC Out 12 VDC Out (12 V trigger) (12 V trigger) (12 V trigger) via a 3.5 mm connector via a 3.5 mm connector via a 3.5 mm connector DIMENSIONS INCHES 17.3w x 5.7h x 19.8d 17.3w x 5.7h x 19.8d 17.3w x 5.7h x 19.8d CENTIMETERS 43.9w x 14.5h x 50.3d 43.9w x 14.5h x 50.3d 43.9w x 14.5h x 50.3d WEIGHT SHIPPING 68 lb., 30.8 kg 66 lb., 29.9 kg 64 lb., 29.0 k Learn More

Plinius 8200P Stereo Power Amplifier Black Very Good Condition Learn More

Sonic Frontiers Power 1 , just serviced Learn More

ATI 2505 106lb super high quality amp owner's manual: http://www.ati-amp.com/manuals/ATI_2505_manual.pdf Learn More

Bryston 9bst 3 channel version with 2 channels of Lexicon added Learn More

Rotel RMB-1512 in 2023 tested $3000 retail Product highlights: 100 watts per channel into 8 ohms (20-20,000 Hz) at 0.03% THD with all channels driven 200 watts per channel into 4 ohms input linking, input mono switch and signal output link for system configuration flexibility Class D design with thermal and overcurrent protection circuitry frequency response: 10-40,000 Hz (±1dB) signal-to-noise ratio: 109 dB detachable power cord Connections: stereo RCA link input and output for daisy-chaining multiple amplifiers or other components six zone buses, each including: one unbalanced stereo RCA input pair four-pin Euroblock connector input source switch (mono summing in zones 1 and 2 only) left and right 5-way binding post terminals 3.5mm 12-volt trigger in/out with signal sensing switch Learn More

Threshold S200 Power Amp Silver Power output: 100 watts per channel into 8Ω (stereo) Frequency response: 7Hz to 100kHz Total harmonic distortion: 0.1% Gain: 26.6 dB Signal to noise ratio: 100dB Semiconductors: 8 x transistors per channel (output) Dimensions: 8.72 x 19 x 9.125 inches Weight: 44lbs Year: 1984 Learn More

Mark Levinson ML11 power amplifier . With its 2 x 50W in a small enclosure with the heat sinks hidden inside makes it look shy, but it's not. It another great amplifier of MLAS which is perfect as an all-purpose home hifi amplifier. As the others he can drive almost any load. Specifications Power output: 2 x 50W. Weight: 11Kg Maximum power : 260W. Learn More

Pioneer Series 20 M-22 Learn More

SUMO The Nine + Differential Power Amplifier Sumo gives you the real thing. The nine is a pure class A power amplifier that remains class A even when driving 4 Ohm loudspeakers. The Nine's approach to class A is so unique it earned a US patent - an amazing achievement for an audio component. Sumo's exclusive class A engineering provides all the advantages and none of the disadvantages of typical class A designs. The unit features an all aluminium anodized chassis with massive extruded heat sinking and built in whisper fan for efficient heat dissipation. Military grade G-10 glass epoxy printed circuit boards throughout. Power supply incorporating 1.4KW shielded toroidal transformer and 42,000 microfarad computer grade filter capacitors, resulting in supply voltage regulation better than 3%. Learn More

Bedini BA-803 2 available excellent cosmetics, unused last twenty years. Original boxes. 250 watts Class A Operation Learn More

Lexicon NT512 available, one silver only check availability before purchasing. 120 watts per channel RMS into 8 Ohms, 200 into 4. THX certified Balanced and RCA 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

Lexicon 512 5 channel (Same as Bryston) 3 channels just recapped, two other channels also recapped recently Learn More

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