hi guys, I recently put a basic stereo in my vlt( head unit and 4 speakers,no amp),as it didn have any kind of radio whatso ever,now when the car is cold,the stereo works fine,once it warms up,it gets bad crackles thru the speakers,especially when braking,if i load it right up with headlights etc,it gets real bad,i thought alternator myself,but it seems to be rather intermitant?any sugestions will be greatly appreciated, i did search this,but couldnt find any info thanks

sounds like a hack job or a hacked unit, most likely a hack job. get a professional to install it properly