I have a problem with my system. I have 2 12" Kicker Comps with a mtx 275x amp. I've had the setup for about 5 years now. I can hear my engine through my subs. Whenever i rev the engine the subs make a whining sound. I have pretty thick monter wire. I don't know what gauge. Could it be a bad ground? Don't know much about electrical stuff. Anybody have any suggestions? Thanks