ADCOM GFA-555 MK2 boards are here!

Posted on by hoppesbrain

Hi everyone,
My GFA-555 MK2 boards are ready to go! Thanks to Jon Morris of Morris Audio in Wyoming for helping me work out the bugs and validate the design. He’s already restored a few customer’s GFA-555 MK2’s with my boards.

Get one here in my store. – GFA-555 MK2 Input Board

NEW – I am now offering these boards fully assembled and tested for $380. All you need to do is make sure your power supply and output section are good.

GFA-555 MK1 “VERTICAL” boards coming soon!

Posted on by hoppesbrain

Do you have one of the first batch of ADCOM GFA-555 amps ever made? My GFA-555 MK1 boards work great in these amps, but they must be physically modified to work with the horizontal board.

Until now! I have designed new boards for these early “Vertical” 555’s.

I really like how this layout turned out. Very pleasing symmetry.

This is the original board:

Continue reading GFA-555 MK1 “VERTICAL” boards coming soon!