i have a couple 6X9 200W max pioneers in my rear of my car and i hooked them to my 400W mtx amp. Wen i play then even a little too loud the bass kicks sound like "pop"s once in awhile. Whats up with that? I dont think it used to do that. or maybe is my amp's gain turned up too much? Cause it does it even before it distorts. or is that a distortion in itself?