I own that amp. Agree with others; there shouldn’t be a buzz/hum. I’ve had issues with other ARC amps, and it was miserable. (Brand new 160S that had to get a new PCB after a few months, which took several months). FWIW, I also ran it with Treo CTs for a few months. To each his own, YMMV, and all that, but I did not think the REF 75 was enough for those speakers. They sounded dramatically better — liberated — with the 160S. Until it broke.
