it was supramans amp the 1500 (BOSS RT1500D 1500 WATT CLASS D MONO). it powers up but it seams like the RCA’s arnt hooked up the only thing I figure (he swears up and down it worked when he pulled it) is that because I don’t have the “remote” the base control that it is muted or somthing. (he forgot to pull it out of the car before he sold it.)