i have a 1994 3000gt sl and it was already wired for a system when i bought it. so i hooked up 2 punch 10s and a punch 300 amp. everytime the system goes to hit the radio will like skip it and if i turn up the radio too loud itll shut off and come back on. would the problem be a low battery? any help appreciated

 

Im not sure if this is it but check and make sure your terminals are both tightened. I had that problem when i put my in dash dvd in. Double check on all your wiring too.

 

you have a bad ground on the radio harness. pull the radio out and check where the ground wire is running to. you might need to just ground it to a grounded piece of metal.