MANTI5 10+ year member
CarAudio.com Elite
Hey, my neighbor is having an issue with his new headunit and the volume of the rear speakers. The wires are all tight and there's sound from the rear but it's really low. It has a factory amp and works just fine when he hooks the factory headunit back up, he has a PAC module someone told him would help but it hasn't. I haven't had much free time to look into for him so I thought I'd pick your brains to see if there's anything obvious.