Good point, I hooked it up to assure it worked. I scheduled an appointment with my "amp" guy for this week. He's going to fully test and clean the unit and take care of any bugs that pop up. I can tell you that the volume pot is going to need to be cleaned/replaced as it is a little scratchy. I am a tech for a living, but I work mostly with industrial equiptment, servo/stepper drives, plc's, etc. I just don't have the time anymore to do all the repairs myself. The family takes priority nowadays.