What good is a brand new amp for your stereo system if you don't immediately build some sort of switch comparison circuit to test it against another amp? My parents got me a new amp - an Onkyo A-9010 - for my sound system for Christmas. I had one (Rotel RA 972) that was good once upon a time. Though the volume control was always a bit finicky and for the last 4 years it sometimes only played out of one speaker.... Read More