OK, it seems like since I got the subs/amp hooked up that after I bump for a while, my rear windows have moved down slighty, kinda like someone turned the handle and started to open them just a little bit...the first time I noticed it was because I heard air coming in the car, so now I check them occassionally and sure enough, just a few minutes ago, when I parked, the back passenger side window was down just a bit. Rotated the handle so it went back up...but IS it possible that my little 300 watt system is causing this?