whenever the volume is all the way down and i roll the window up or down, my sub and rear speakers make a strange noise, but only on the driver side because thats the side i have the audio running down. power is on the passenger side. i installed an amp and have that running to another amp inside of a box with a 12 in it. i had the rear speakers hooked up to the amp so i could add two more mids and a pair of tweeters in each door. but for some reason the rear speakers just stopped working the other day, and i was too lazy to find out why so i just put some small floor speakers in the back hooked up to the amp. lol any idea why its making the noise when rolling up my window? btw i have power windows.