Update: *SOLD*
Dang, I kinda want to keep this one, but here it is for sale!
Hoppe’s Brain Refurbished ADCOM GFA-555 MK1
This particular GFA-555 came to me as a customer trade-in, and was very well loved and cared for, so I thought it deserved a new life.
I went all-out on this one. It’s got all the options, including an entirely new input circuit board, and a soft-start power supply with (4) 27,000uF capacitors.
The only remaining original electronic components are the power transformer and output transistors! I expect this one to last at least another 30 years.
New input board 
Custom mounting plates for binding posts, with integrated Zobel. 
Soft-start power supply 
Back panel with new RCA input jacks and large binding posts 
Bypass capacitors added to output modules 
