Continuous power output: 250 watts RMS x 5, 20 Hz - 20 kHz, 8 ?, all channels driven 400 watts RMS x 5, 20 Hz - 20 kHz, 4 ?, all channels drivenCurrent capacity: 60 amperes peak per channelPower bandwidth: 5 Hz - 100 kHz, +0/-3 dB at 1 wattTotal harmonic distortion: < 0.2 % at full powerIM distortion: balanced 16 V rms < 0.04 %Slew rate: > 130 V/µsecondDynamic headroom: > 1.5 dBInterchannel crosstalk: > 78 dB at 1 kHz; > 63 dB at 20 kHzInput sensitivity: 1 V for 28.28 V, THX Reference LevInput impedance: 47 k ? unbalanced; 94 k ? balancedS/N ratio: 112 dB, input shorted, IHF A-weightedDamping factor: > 1100 at 20 HzVoltage: 110V - 120VDimensions: 17-1/2 w x 7-5/8 h x 20 d, 7 h without feetNet weight: 80 lb.

In mint condition. Kept in a cooling cabinet with strong ventilation. This is one of the few amps that is pure class A for the first 10 watt (most of what you need to drive any speakers). No known problems whatsoever. Local pick up only!! ABSOLUTELY no shipping unless you can arrange your own pickup, boxing and freight. It weights almost 100 lbs! Can demonstrate its in working condition for SERIOUS BUYERS. Reason for selling: such a powerful amplifier is unnecessary to drive bookshelf satellite speakers. Decided to get a digital amplifier that keeps the fan noise down.

Fantastic sounding and powerful 5 channel amp. In excellent condition. Took it out of the box, placed it on my rack and havent handled it since, so other than a minuscule few marks on the left front side, it is a lovely thing. Comes with box & manual. Lives in a low humidity, smoke, and pet free environment all its life. Local pickup preferred as this thing weighs a ton and would be very costly to ship.

Parasound Halo A51 5 Channel Power Amplifier A51 Halo. Condition is Used. Local pickup only.

Parasound Halo A51 5 Channel Power Amplifier Silver Designed by John Curl Continuous power output: 250 watts RMS 8 ? 400 watts RMS 4 ? THX Ultra 2 Dimensions - 17-1/2 w x 7-5/8 h x 20 d, 7 h Weight: 80 lb.

Parasound Halo A51 5 channel 250 Watt power amp. Amp is in excellent cosmetic and operational condition. It has both RCA and XLR balanced inputs. Please check out the pictures for overall condition. Switched to a 7 channel amp so selling this very reliable and wonderfully sounding amp. Includes original power cord, rack mounting brackets, 12V trigger cable, and owners manual. Will be shipped in original double box.

For sale is a 5-channel Parasound Halo A51 power amplifier in very good condition except a tiny blemish and a scratch at lower left corner (see pictures). This unit was more than $5000 when bought new and still manufacturing. I have used it for home theater through Marantz receiver preouts and stereo music through Conrad-Johnson tube preamp (sold). Both watching movies or TV and listening to music giving fantastic, punchy and musical enjoyment. There were no original boxes as those were left behind when I moved to a smaller house where I was unable to store the big size double boxes. Because this is an 80 lbs amp, it will be too risky to ship. Therefore, the sale is for LOCAL PICK UP ONLY in Malden Massachusetts.

Hello Friends: Here is a Parasound Halo A51, 5-channel amplifier (250W X 5), in silver finish. Unit is in pristine operation and cosmetic condition. No scratches or dents. Has been well cared for. Used conservatively, never over-stressed. Was mounted externally (top of rack, in open air) for optimal thermal cycling/ventilation. Unit includes: original manufacture's carton/box and packaging materials, rack mounting brackets, original AC cord, user manual. Note: unit is packed in double box One of the best multi-channel amplifiers available. The best sounding amp I've ever owned. Those familiar with Halo products know the quality of construction and performance. I am original owner. Priced to sell. Will ship to lower 48 states, only. No international shipping. I am downsizing, moving into a much smaller living situation. (unit specifications, from Parasound website): Continuous power output: 250 watts RMS x 5, 20 Hz - 20 kHz, 8 ?, all channels driven 400 watts RMS x 5, 20 Hz - 20 kHz, 4 ?, all channels driven 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: 78 dB at 1 kHz; 63 dB at 20 kHz Input sensitivity: 1 V for 28.28 V, THX Reference Lev Input impedance: 47 k ? unbalanced; 94 k ? 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: 80 lb.

Hello Friends: Here is a Parasound Halo A51, 5-channel amplifier (250W X 5), in silver finish. Unit is in pristine operation and cosmetic condition. No scratches or dents. Has been well cared for. Used conservatively, never over-stressed. Was mounted externally (top of rack, in open air) for optimal thermal cycling/ventilation. Unit includes: original manufacture's carton/box and packaging materials, rack mounting brackets, original AC cord, user manual. Note: unit is packed in double box One of the best multi-channel amplifiers available. The best sounding amp I've ever owned. Those familiar with Halo products know the quality of construction and performance. I am original owner. Priced to sell. Will ship to lower 48 states, only. No international shipping. I am downsizing, moving into a much smaller living situation. (unit specifications, from Parasound website): Continuous power output: 250 watts RMS x 5, 20 Hz - 20 kHz, 8 ?, all channels driven 400 watts RMS x 5, 20 Hz - 20 kHz, 4 ?, all channels driven 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: 78 dB at 1 kHz; 63 dB at 20 kHz Input sensitivity: 1 V for 28.28 V, THX Reference Lev Input impedance: 47 k ? unbalanced; 94 k ? 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: 80 lb.

Get ready to experience the ultimate power and quality in your home audio system with the Parasound Halo A51 5 Channel Power Amplifier. This amazing amplifier boasts 5 channels and 5 inputs, allowing you to connect all your favorite home audio devices for an unparalleled listening experience. The Halo A51 is beautifully designed with top-of-the-line components to deliver high-quality sound and power to your speakers. This power amplifier is perfect for any music lover who wants to take their audio system to the next level.

Hello Friends: Here is a Parasound Halo A51, 5-channel amplifier (250W X 5), in silver finish. Unit is in pristine operation and cosmetic condition. No scratches or dents. Has been well cared for. Used conservatively, never over-stressed. Was mounted externally (top of rack, in open air) for optimal thermal cycling/ventilation. Unit includes: original manufacture's carton/box and packaging materials, rack mounting brackets, original AC cord, user manual. Note: unit is packed in double box One of the best multi-channel amplifiers available. The best sounding amp I've ever owned. Those familiar with Halo products know the quality of construction and performance. I am original owner. Priced to sell. Will ship to lower 48 states, only. No international shipping. I am downsizing, moving into a much smaller living situation. (unit specifications, from Parasound website): Continuous power output: 250 watts RMS x 5, 20 Hz - 20 kHz, 8 ?, all channels driven 400 watts RMS x 5, 20 Hz - 20 kHz, 4 ?, all channels driven 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: 78 dB at 1 kHz; 63 dB at 20 kHz Input sensitivity: 1 V for 28.28 V, THX Reference Lev Input impedance: 47 k ? unbalanced; 94 k ? 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: 80 lb.

This is a Used Parasound Halo A51.  It arrived to me damaged from shipping w/ a crack/dent on the front top right corner of the faceplate and heat sink.  There are some additional difficult to capture scratches on some of the heatsinks and the P light has a scratch on it.  Rear terminals all in great condition w/o obvious signs of damage/wear.  Most of this is imperceptible from >5 feet away.  Otherwise the amp works perfectly, I used it w/o any issues for 3 years for atmos channels in a home theater.  I am only selling because I have downgraded the home theater. This is a great opportunity for someone to get a phenomenal amp for a discount d/t cosmetic issues.  Please inquire if you would like more pictures of the item. Ideally looking for a local sale since I do not have the original box.  That being said, if someone is willing to pay shipping costs I can arrange for them to be shipped in my other A51’s box.

Parasound Halo A51 5 Channel 250W Power Amplifier. Great excellent condition. I own 2 of these as I was going to Bi-Amp my B&W 803s and I never proceeded with that plan. I bought this from a licensed dealer when I built my house 6 years ago as a barely used and fully tested model. Before I decided to put this up for sale I had it completely checked out and refreshed with all critical capacitors replaced in all 5 amp modules. Yes, there are literally 5 separate amp modules in this Bad Boy. Includes Power cord. The Halo A51 by Parasound is one of the best Multi channel amps available. If you dont know the Parasound quality, please google some references and you will hear ... and all the hype is deserved. The amp will be shipped in the original double boxes. The unit is cosmetically clean and functionally/sonically perfect. Please let me know if you have any questions. If you are not satisfied, unit can be returned less shipping cost, and at buyer expense. Please visit Parasound.com to see full specs.

This is a like new Parasound Halo A51. I purchased it from the original owner who used it very lightly for home theater. I used it for the past 4 years very lightly for home theater rear channels. I have now downgraded my home theater and no longer need it.This week I had it serviced at an authorized repair center, Adams Electronics, and they replaced the power relays, effectively renewing the amplifier to like new condition. I can confirm listening to the amp w/ sensitive speakers I hear no audible hum or defects.I see no cosmetic defects whatsoever, I provided pictures to confirm.I also am selling another Parasound Halo A51 amplifier that has been cosmetically damaged, whichever amplifier sells first, I will keep the other. I think that should speak to the quality and condition of both of these amps as I am willing to keep one of them.Please send offers with address so I can calculate shipping costs appropriately.

Used Parasound Halo A51 5 Channel Power Amplifier. Working condition, been unused for a few years. Sold as is.

Used Parasound Halo A51 5 Channel Power Amplifier. Working condition, been unused for a few years. Sold as is.

Hello Friends: Here is a Parasound Halo A51, 5-channel amplifier (250W X 5), in silver finish. Unit is in pristine operation and cosmetic condition. No scratches or dents. Has been well cared for. Used conservatively, never over-stressed. Was mounted externally (top of rack, in open air) for optimal thermal cycling/ventilation. Unit includes: original manufactures carton/box and packaging materials, rack mounting brackets, original AC cord, user manual. One of the best multi-channel amplifiers available. The best sounding amp Ive ever owned. Those familiar with Halo products know the quality of construction and performance. I am original owner. Priced to sell. Will ship to lower 48 states, only. I am downsizing, moving into a much smaller living situation. (unit specifications, from Parasound website): Continuous power output: 250 watts RMS x 5, 20 Hz - 20 kHz, 8 ?, all channels driven 400 watts RMS x 5, 20 Hz - 20 kHz, 4 ?, all channels driven 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/µsecondDynamic headroom: 1.5 dBInterchannel crosstalk:78 dB at 1 kHz; 63 dB at 20 kHzInput sensitivity: 1 V for 28.28 V, THX Reference Lev Input impedance: 47 k ? unbalanced; 94 k ? 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: 80 lb.

Parasound HALO A51 Five Channel Power Amplifier I have had this amp for a few years and has been used at most once every couple months for my rear channels. The amplifier has remained in my rack since purchased. There are very light scratches on a few of the fins from the initial placement of the amp in the rack, but is sonically perfect. Circuitry designed by legendary John CurlTHX Ultra2 certifiedHigh bias Class A/AB operationBalanced inputs with discrete circuits and XLR connectorsDirect Coupled - no capacitors or inductors in signal pathComplementary MOSFET driver stage and JFET input stage40 beta-matched 15 amp, 60 MHz bipolar output transistors2.2 kVA encapsulated toroid power transformer with independent secondary windings for each channel164,000 ?F power supply filter capacitanceDC Servo and relay protection circuitsAC present, channel status, high temperature indicatorsHeavy-duty 24k gold-plated 5-way speaker terminalsGold-plated RCA input jacks; ground lift switchAuto turn-on by 12v trigger or audio signal4u Chassis, carry handles, rack mounting adapter includedContinuous power output:250 watts RMS x 5, 20 Hz - 20 kHz, 8 ?, all channels driven400 watts RMS x 5, 20 Hz - 20 kHz, 4 ?, all channels drivenCurrent capacity:60 amperes peak per channelPower bandwidth:5 Hz - 100 kHz, +0/-3 dB at 1 wattTotal harmonic distortion:< 0.2 % at full powerIM distortion: balanced 16 V rms< 0.04 %Slew rate:> 130 V/µsecondDynamic headroom:> 1.5 dB Interchannel crosstalk:> 78 dB at 1 kHz;> 63 dB at 20 kHzInput sensitivity:1 V for 28.28 V, THX Reference LevInput impedance:47 k ? unbalanced; 94 k ? balancedS/N ratio:112 dB, input shorted, IHF A-weightedDamping factor:> 1100 at 20 HzVoltage:110V - 120VDimensions:17-1/2 w x 7-5/8 h x 20 d, 7 h without feetNet weight: 80 lb.

I am selling my Parasound A51 due to a system downgrade; I have too many amps in the rack! The amp is flawless and is currently connected to my home cinema. I believe I have the box in the loft, so in that case postage would be quite straight forward. But due to weight and insurance costs, expect to pay around £90 for a UPS insured delivery. Collection would be preferred or could deliver within a reasonable distance.Apologies for only a front-facing photo, but the amp is located near a back wall, plus I have XLRs and speaker cables going in, so you can imagine how difficult it would be to photograph the back!If you have any questions, feel free to ask. Thanks for looking... ps: buyers outside the UK please contact me first to discuss your import tax fees, and expect a 3-4 day delivery with UPS.