Power Amplifiers

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

Parasound HCA-500 High Current Power Amplifier Power output: 50 watts per channel into 8Ω (stereo) Frequency response: 10Hz to 60kHz Total harmonic distortion: 0.25% Damping factor: 100 Signal to noise ratio: 100dB Dimensions: 17-1/4 x 3-3/4 x 11-3/4 inches Weight: 16lbs Learn More

Parasound JC1 inquire with postal code for freight price for each to ship Learn More

Perreaux PMF5150B Learn More

Perreaux Prisma 350 owner's manual: https://mail.google.com/mail/u/0/#search/prism+perreaux?projector=1 Learn More

Pioneer Series 20 M-22 Learn More

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

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

Plinius SA102 One owner, all excellent condition Learn More

PS Audio 200C (3 available) we need to service/upgrade these before shipping Learn More

PS Audio BHK 300 monos excellent with original boxes inquire for trucking pricing. I'ts safer Learn More

PS Audio Delta 100 Learn More

Rotel RB-1070 Power Amplifier Power output: 130 watts per channel into 8Ω (stereo), 330 watts into 4Ω (mono) Frequency response: 4Hz to 100kHz Total harmonic distortion: 0.03% Damping factor: 500 Input sensitivity: 1V Signal to noise ratio: 120dB Speaker load impedance: 4Ω (minimum) Dimensions: 430 x 121 x 350mm Weight: 11.9kg 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

Rotel RB-1582 200 watts/channel Learn More

Rotel RB-951 Power Amplifier Power output: 50 watts per channel into 8Ω (stereo), 150 watts into 8Ω (mono) Frequency response: 15Hz to 100kHz Total harmonic distortion: 0.03% Damping factor: 280 Input sensitivity: 0.775V Signal to noise ratio: 116dB Speaker load impedance: 4Ω (minimum) Dimensions: 440 x 92 x 334mm Weight: 6.8kg Learn More

Rotel RB-970BX Power Amplifier Black Power output: 60 watts per channel into 8Ω (stereo), 180 watts into 8Ω (mono) Frequency response: 15Hz to 100kHz Total harmonic distortion: 0.03% Damping factor: 280 Input sensitivity: 1V Signal to noise ratio: 116dB Speaker load impedance: 4Ω to 16Ω Dimensions: 440 x 92 x 334mm Weight: 6.8kg Learn More

Spectral DMA-180 Stereo Power Amplifier Power Output: (continuous) @ 8 ohms - 200 Watts RMS @ 4 ohms - 400 Watts RMS @ 2 ohms - 683 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 (internal wiring) 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: 40 Amps Thermal Protect Threshold: 85° Celsius, 185° Farenheit AC Main Fuses: 2 @ 4A 3AG slo-blo, for 100 - 120 VAC, 2 @ 2A 3AG slo-blo, for 220 - 240 VAC Fuse Status: LED indicator (2) Size and Weight: Dimensions: 48cm (19")W x 17cm (6 1/4")H x 48cm (19")D Weight: 60 lbs, 27.2 KG Net Learn More

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

Almost no use, this is the top of the line Stax headphone amplifier in the original double box The SRM-T8000 is STAX new designed top-of-the-line driver unit. For the first time in STAX driver unit history, the large-sized toroidal transformer and non-magnetic aluminum chassis have been adopted for unclouded clear tone quality! A newly developed large-sized aluminum insulator, combined with new material of high isolation efficiency and grip power, make this flagship designed SRM-T8000 a top performer. Features: • The full-balanced transmission of hybrid amplifier configuration with 6922 dual triode tube of established reputation for the first stage and class-A operating semiconductor at output stage realized ultra low-noise, accurate and rich musical expression. • The vacuum tube of the first stage was mounted on the independent board in order to shut out vibration and external noise. Further, noise has been totally eliminated by vibration-proofing damper and vacuum tube shield cover which are used also for a hard disk etc. • The large-sized toroidal transformer - for the first time in STAX driver unit history - as well as non-magnetic aluminum chassis has been adopted for unclouded clear tone quality. • Four pairs of inputs are equipped. (Notes: LINE4 is an optional slot for future purpose. As for now, release is not yet determined.) • The SRM-T8000 features the EXTERNAL (BYPASS) function which passes the volume controller of the unit and enables volume control through external equipments. • The newly developed large-sized aluminum insulator, combined with new material of high isolation efficiency and grip power, has been employed. Specifications: Frequency response: 1Hz - 115kHz / when used with one earspeaker Rated input level: 100mV (at 100V output) Maximum input level: 30Vrms. / at minimum volume Gain: 60dB Harmonic distortion: 0.01% or less / 1kHz / when used with one earspeaker Input impedance: 50kO / 50kOx 2 (XLR input) Maximum output voltage: 470Vrms Mains voltage: AC120V, 50/60Hz Power consumption: 58W (95W with optional slot) Operating temperature: 0 to 35 degrees C (less than 90% humidi- ty, non condensing) Dimension: 320 (W) x103 (H) x395 (D) mm (protruding portion included) Weight: 7.3kg Learn More

SUMO ANDROMEDA II POWER AMPLIFIER excellent cosmetics Our tech went through this and readjusted dc offset, bias Sumo Andromeda II: Solid-state stereo power amplifier. Rated power output: 240Wpc into 8 ohms (23.8dBW) with less than 0.05% THD, 400Wpc into 4 ohms (23dBW) with less than 0.1% THD, from 20Hz–20kHz. Intermodulation distortion (IMD): 0.05% from 0.25W to full power. Frequency response: ±0.1dB 20Hz–20kHz, –3dB from 0.1Hz–170kHz. Input impedance: 47k ohms. Input sensitivity: 1.8V RMS for rated output. Hum and noise: 110dB below rated power. Rise time: less than 2µs. Slew rate: 115V/µs. Damping factor: greater than 500. Dimensions: 19" W by 7" H by 16.75" D Weight (shipping): 55 lbs. 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

Swiss Physics 6a amplifier and 5 preamplifier package. This company was founded by the engineers from goldmund rarely available. spectacular sounding 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

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

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

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

Triad Powersub AmpliflierTriad benchtested 5/18 good Learn More