Adcom GFA 555 amp upgrades

My dad got a gfa 555 years ago and it was the one that originally gave me my Audiophile epiphany. He still uses it and it's going strong. I don't know if you'd really gain anything by going to the series 2 though. What about that one designed by Nelson Pass (I can't remember the model)

Musical Concepts modified my GFA555 many years ago with great results. I eventually gave it to my nephew who loves it. John at Musical Concepts told me that the Mark 2 version was warmer and more laid back but had less resolution and weaker bass, so he thought it was not an improvement over the mark 1, although some people might like that sound. The question is whether it is cost effective to do a complete mod/upgrade on such an old design, when you can buy a better amp for the price of a complete mod/upgrade. That is unless there is something about the GFA555 you really like and would like to keep but just improve upon.

See also this recent thread:
"Adcom GFA-545 - Modify or Move On?"

John

Sell and get a pair of 565's.

I had a Mark I and Mark II. I had the Mark II modded by Musical Concepts since it was a later model. Much improvement. However after much comparision I found the original unmodded Mark I to my preference.