I hear ya but I just think 15s are better for getting peoples attention from 5 blocks away instead of sound quality. That was the reason for the explanation request.

My experience with MTX subs is that they are power hungry. We use to hook them up to a wall socket when I wanted new subs. The MTX subs lasted the longest. It took forever for them to blow. What amp are you using and 1 sub or more?

I am guessing that the system is in an Accord. Do you have any problems blowing out the seal on the rear window? I had two Accords and both of them started to leak because of the system.