I've bought and sold a number of amps over the years. Pass is one of the few I regretted selling in hindsight and the only one I reacquired, moving up from the INT-60 to the INT-250. I thought it might be overkill for my 100db efficiency speakers, but the data retrieval, dynamics, soundstage, bass grip, etc. is excellent in my system, my room and to my ears.
