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.
Looking to upgrade Adcom GFA555: Parasound?
This is my third system. Honestly, usually used for semi-active or background music.
Speakers are vintage Wilson Watt/Puppy 7. Source is an Eversolo dac/streamer Into a vintage Classe DR5 preamp. Amp currently is the aforementioned Adcom: bought it new while in college 40 years ago! The sound is pretty good, though a bit “small” and closed in.
Considering replacing the amp with a Parasound A21+. Thoughts? Am I wasting my time?
Target cost to upgrade this rig: less than $5K.
Thanks!