Two: NAD 2400 and Quad 606 mki, both from the 1980's; the Quad having lower distortion. Used to have a third (Parasound HCA-1500), and that one had sounded worse than the other two at $500 used (sorry John Curl), and I couldn't wait to get rid of it. I love buying older used gear on Ebay, and soldering in new components (that may or may not be better than the OEM ones). Main purpose for having more than one, is so I can have a backup in case I'm doing work on one of them, especially if the mods don't go well: for example, the Parasound was on fire; I had put a dead short on the board that had gone undetected. Luckily, it was a three channel amp, and I was able to sell the other two. Also, I would not have to do without my system, when selling and buying second hand, where I don't know how long it will take to sell an item.
How many amps do you own?
i am wondering how many folks here own more than one amp. I own a couple of amps...a tube mono block ( Jadis) and a stereo ss Jeff Rowland model 8t ( modded). These two amps give me what I consider to be the best of ss and tubes. i do NOT use the amps in the system at the same time. As such, the system requires two sets of speaker cables and two sets of ic cables. I can run two amps off my preamp. Anyone else have the option of two amps..if so, what are they and why do you run multiples.