i have 2 phenix gold 6.5 speakers rsd speakers in the doors in my truck... some times ( done it 3 times now) i will just be driving listening to wat ever i pick up or a cd at about half volume and the drivers side just starts makeing this weird *** sound. kkinda sounds like if farting and it does it for a wile and then it will just stop. when its doing it if i put my hand on the cone it stops untill i take my hand off then it does it some more.... anyone no why?