Subs keep blowing

For those that don't know what clipping sounds like, , it kida goes like this.    You hear boom boom boom, , then you turn it up more and hear humm humm hummm, , , that would be the signal clipping.   Basically the sound waves are running into each other and makeing the sub try to fire out and in at the exact same time......That equals lots of heat, and a melted sub.

Turn the gain down to about half way to 3/4 .  

What kind of cd player is he useing?

1. Set gain at zero on amp.

2. Turn your head-unit up untill you hear distortion coming from your mid and high speakers, then back down the volume to just before this point.

3. Now keep the volume at this point and turn the gain on your amp up untill you hear distortion coming from your subs. Turn the gain down just before that point.

Some fine tuning will probobly be needed if you want to hear bass at lower volumes still.