Which adcom sounds best?

Adcom is a great bargain brand and I think was always well made...I've owned a couple of 535s (one new back in the day, others used for studio monitors) and some nice preamps, and now use a 5300 Mosfet for deck speakers and as a backup amp...sounds great for this purpose anyway, cost maybe 100 bucks in "like new" shape a couple of years ago. I think they make a new version of the 5500 now, but plenty of their older amps are a steal...no geek cred, but so what? The 5400 has legions of fans seemingly, but of course you have to try these and decide for yourself. For such small money you don't have a lot to lose.

Designed by Nelson Pass, the GFA 555 is the best in that series.

The GFA 565 monos are good sounding too. You may also like some of the earlier B&K amps.

I had the Adcom 555, (4)555IIs, the 5400 & (2)5500s.
The 5400 & 5500 sounded much better, to me.
Try to get a later 5500 with the IEC plug, instead of the captive power cable.
This will allow you to try different power cables.

Thanks a lot to all the poster!

Daneal, which one sound the best to you?
What is the difference between the 555 and 555 II model?
Did the 5500 sound similar to 555?

Cheers,

IMO the preamps are the weekest component although the GFP750 came close to getting the most out of the amps. A lot less dark and brittle sounding.