So i installed a radio on a Bonneville it had the origanal stereo and i put a CD player on it. After i installed it it sounded good until a certain volume then the speakers sounded disrupted or something. When first installing the stereo i coudnt connect both the back and front speakers because the stereo woud shut off sort off. so i connected only the front speakers and then i thought of buying new speakers i did i installed them and it still sounds the same what the **** is going on???? I woud apreciated the help asap please

 

Sounds like you have a problem with your total speaker resistance, probally in your wirring. to low ohms due to #of speakers hooked up on 1 channel or you positive or neg.
are differnt between left and right speakers.