Looking to upgrade Adcom GFA555: Parasound?

I'd highly recommend the guys at Musical Concepts, John Hillig has several options for that unit and can even provide new FETS from Exicon that really give that amp significant improvements in the sound quality.

I second or third the idea of keeping the Adcom.

I recently reached out to Chris Hoppe to refurb my 565’s and he put me in touch with Jon Morris. Jon did a great job overhauling my mono blocks using Chris’s new designed cards and all of the best components.

altonbtc@gmail.com Is Jon’s email address.

Much cheaper than the alternatives. And should sound as good or better.

Why not a Classe CA-300/400. Can you ever over power a Wilson Audio loudspeaker?

I recently received the Magnepan LRS+ for my bedroom/home theater 2.1 system.

I assumed I would have to get a new amp for this system but discovered that my old Adcom 545 II drove the LRS+ so well that I don’t know what else I would want in an amp in this context.

@reubent ..."The two techs that I’m familiar with who upgrade the GFA-555 are John Hillig at Musical Concepts and Chris Hoppe at Hoppe’s Brain. Both are well respected and get great reviews/feedback. ..."

OP @bobbydd +1 to @reubent’s posts above. Definitely worth serious consideration. Also worth identifying if yours is a MKI or MKII original GFA-555. In any case, these type of techs know what to replace for aging and upgrades where it matters.

I took a chance on investing and fully upgrading one of Nelson’s other designs on the Pass/Forte amp side, not exact - but some of the same lineage. Give those folks a call listed above and ask them more about what they replace, upgrade, and the expected differences and outcome. You might be surprised. Super happy with mine, and really like how it sounds.