Stereo Power Amplifier
Power output: 250 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 20kHz
Total harmonic distortion: 0.02%
Damping factor: 600
Gain: 27 dB
Input sensitivity: 2V
Signal to noise ratio: 110dB
Semiconductors: 72 x transistors, 11 x zener diodes, 31 x diodes, 2 x IC, 2 x diode bridges
Dimensions: 213 x 432 x 310mm
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Reviewed Feb 16th, 2016 by kmh3212
When I bought the amp off *bay it had a loud pop on startup and shutdown. I knew this going to do damage to my speakers. I raised the hood and suspected bad caps. That was a year ago. I cleaned up several projects and plugged it in and turned it on. The problem went from bad to a lot worse. Went ahead and ordered the caps on the input boards. Since I waited the electrolyte corrosion may have compromised a tracing or two on the boards. Now I have to repair that too. We will see. I must say after the startup pops was working fine but definitely not perfect as the seller sold it to me.
Reviewed Jul 31st, 2015 by mobay
This is a monster of an amplifier bar none. 250watts ( more like 270 + ) and a damping factor of 600...ouch! This amp will drive ANY speaker on the planet. It has one fatal flaw however.All of the capacitors should/must be replaced. This was not Adcom's fault but in the year this amp ( and for that matter many other electronic devices ) was made a group of faulty capacitors were sold, but hey ,they were less expensive, than the Japanese equivalent.. All of these would leak and fail and can result in the destruction of a speaker connect to this amp. A large THUMP on startup or shutdown tells you that you are on borrowed time. I paid $300.00 for this amp and although mine was not leaking , I replaced all the capacitors. There is a firm in NY that can do this and they charge $425 for the repair. YOU can do the repair if you are careful. Go to audikarma.org and do a search for this amp and you'll see the thread on it's repair.
OK now with that said....... did I mention that this is a monster of an amp? The torroidal transformer is rated at 100,000 uF and the unit weighs a ton ( not really but it's super heavy ) . Sound quality is great and I would characterize it as dark/neutral. The sound is effortless, and so clean that you may damage speakers with the high output because of the lack of distortion at high levels. Use fuses ( 3 amp fast blow ) to protect your speakers from excessive output that this amp can easily produce. It is that powerful.., and Oh! so very clean and undistorted=== Once fixed this amp is probably worth close to $800.00 or more and the actual cost of the replacement capacitors needed is less than $50.00. A great return on a small investment. A truly exceptional amp whose reputation was marred by a unfortunate choice of parts from a supplier who sent Adcom, and many, many other manufacturers sub-standard parts. Ask whoever is selling this amp if the capacitors were replaced and the circuit boards cleaned. ASK THEM TO SHOW YOU A BILL certifying that the work was done. If they cannot, Do Not pay more than $300.00 ( or less ).