I just bought a used amp online and it worked for a few days now the left channel rca is kinda messed up. that understandable i can take it to get fixed but where. thats not the only thing i noticed. during my trouble shooting i noticed that my sum out from my head unit is not working either.


Both amp and head units are rockfosgate.

Is there anything i can check to to get my pre amps working agian. As a matter of fact only one pre out work and i have 3 wtf. im so pissed off right now. Any suggestions