My speakers are popping? any ideas?

[G35 Scarlet]

It happens when i drive home. i drive about an hour home from work and i drive on cruise control. the guy that previously owned the g coupe put rear subs and i saw that there is wires going to the speakers in the car. but when i am half way home the speakers start popping like loud and it will interfer with the radio or whatever i am listening to. it will keep popping even when i stop the car. then it will turn off at random and come back on. any ideas or hints that could help me?

[SneaKe]

Sounds like a feed-back loop caused by ground interference. By rear subs, do you mean subs in the trunk in a separate box, or upgraded 6x9's in the rear window? Is there a separate amp to these 'subs', or do they run off of the stock amp? What are those wires connected to on each end?

Oh, and welcome to NICO! Take some time and introduce yourself properly over here: http://forums.g35club.org/zerothread/330264

[G35 Scarlet]

Well yes there is a separate sub box in the trunk. and in the trunk there is 2 amps. there is speakers by the rear window. there is four or five different wirings coming from the engine like it grounding from there to the speakers. but not sure.

[SneaKe]

Take it to someone you know who knows a bit about audio equipment. I'd love to help, but your descriptions are not detailed enough.