Tip_A_Soda

Hey Guys, I got a problem with my kenwood amp (friend gave to me for free before selling his car) in my 2000 Echo (or VITZ). The amp seems to be a very old one, don't know the specs but when i turn on the ignition, the amp won't get any power. Some days I would be lucky enough to drive 5 kms before the amp dies on me. The fuse is fine, wiring is correct. Could it just be the amp can't handle my 12" Infinity Sub ? and its time for me to get a new one ? Any suggestions would help : ) Cheers.