Going from the Adcom GFA 555 ii to the Bryston 4b SST or SST2?

@solartea123 Depending on your preamp/front end, it might be beneficial to upgrade further up the chain. What goes in, comes out. Just a thought.

You are likely looking at 2nd hand. Assuming you are running single ended(555ii), purchase an ADA PF201. A real sleeper of an amp....and I know.