Which adcom sounds best?


I went and heard an Adcom GFA-555 and I loved it!
Sounded clean and clear as diamond - uncolored, and with black background.

I have other great amps like Quad, McIntosh, Krell, but I really like Adcom now - go figure.

So, my question is which one to hunt down on used market - since they don't make them any more - :(

GFA-555 or GFA-555 II, or GFA-5500?

5500 is the newer one, no?

Anyone know what years they were made in?

Thanks for your time and expertise on the subject!
liquid-smooth
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.
I too had an Adcom, the GFA-7605 for about 1 month, "sterile and brittle" is spot on for an oversimplified description. IMHO they belong in distribution systems powering Bose and Cerwin-Wega speakers, nuf said.

On the other hand I read some laudatory comments on older Adcoms.

Once they take it to the Middle Kingdom and leave the process unsupervised, manufacturers find out the hard way. Look how smart Apple got with Foxconn throwing people off roofs for them, keeping the workforce under control by local standards while keeping the alfalfa munching token recyclers at home happy with their expensive gadgets.
I have a GFA555 , 2535 , 5802 that are currently in my system . The 5802 is a mosfet design , where as the 555 & 2535 are bipolar . My 555 use to drive my Infinity Kappa 9s . Just listen and hear what sounds best to you .
I had a 5802 which is a great amp for stereo or combined with a 5503 for a nice surround system.