Got a problem with the system in my car. I got the system installed by a reputable audio store here in Orlando. The sub is a Kicker Solo-Baric S12L5, the box is a ported box, and the amp is an older Pioneer GM-X862. Problem is, if I'm running the music at a good thump (about level 50 on "Feel" mode), after about 5 min, the sub starts to cut out.... takes a few minutes and then comes back on. I just want to figure out what the problem is. The amp is an older amp my friend gave to me, so I was thinking it might just be too old. The amp puts out 380 RMS, but the guys at the shop installed 8 gauge wires, I guess that handle up to 300w? So I'm not sure if its because the amp is just old, or if I need 4 gauge wiring because its not getting enough power, or if its something misc like bad ground. If anyone has any suggestions it would be appreciated.