Wow, what a hustle this company is. A chiropractor and a mechanic decide they want to swindle the audio community, so they hijack a company where the owner tragically died and cal it their own !! These guys couldn't design an RCA cable if you asked them to. These amps are the same thing Eric Abraham sold in the early nineties with new badges and a different Binding post layout. I spent much time researching this company because I knew Eric, and boy was I surprised. You can get this same amp direct from the original designer and manufacturer (abamps.com)for about $2500 BRAND NEW with warranty. My 3K64 sounds EXACTLY like my 3K6 III from 1993 and the insides are IDENTICAL. don't waste your time with this company.