I have a JL Audio 600/4, focal crossovers, focal tweeters, focal k2 power speakers, subwoofer, and a jvc headunit. Ive noticed during a sunny day the audio will cut out during a long drive if the volume is very high and wont turn on until the next drive. I dont know why but I think it might be because the amp is overheating? The amp is located above the gas tank. I dont know if much if any air is getting in there. Would moving it behind or below the seat help solve this problem?

 

Yeah, in the air-conditioned area. Or raise the amp above the gas tank surface with DIY stand-offs, to allow air flow under-&-over the amp.

 

I have two amps back there - one over the gas tank, and one in the spare tire. That JL, with its side-mounted heatsinks,
looks fairly well suited to the location, but there's no doubt the ventilation is not great. There are a few things you can try
before relocating the amp:
1) confirm that heat is the likely culprit with a thermometer, either leaving one in there or using an IR thermometer to check
the heatsink temps when you do and don't have a problem.
2) The vent panels behind the seats ventilate the trunk, but there are insulation flaps in the trunk that hang down over them -
you can tape them up, out of the way.
3) There's apparently a vent behind the rear bumper, so airflow goes from the interior vents through the trunk and out the back.
The trunk liner impedes this flow - you can experiment with removing a section, and if this improves things, cut a vent in the
liner and finish it with a nice screen.

I haven't had any (known) heat problems - the only thing I've done is get the insulation out of the way, but I have contemplated
venting the liner.
Good luck, and if you get any useful data, let us know!

 

Thanks. I will try checking the temperature if it happens again.