hi there, i have a 98' sunfire w/ 2.2l engine. i have this annoying problem with my speakers. the higher i rev the engine the higher pitch noise i hear coming from the speakers. i disconnected and reattached and checked again the wiring i have on my aftermarket headset and amp. but it won't go away. it sounds like an annoying dentist drill! any takes on what i can do? this is a pretty new and annoying problem with my car. thanks~!