The problem I have with the bose system aside from the fact that its rather terrible. The highs aren't very clear, and the lows sound good for a while but you never get good midbass upfront with the bose amp because it bypasses the front channels and outputs the low notes from the front channels onto the rear 6x9's this makes fading with an aftermarket deck only kind-of work, you can only fade out the high notes from the back. Basically you wind up having 3 way components with the woofers in the back and the mids and tweets in your doors. It sounds like a good idea and it is for stock especially if you have no sub. In that situation it sounds great and people ask if the car has a sub when I have my sub turned of. However its not comparison to a true sub. Ohh also the wattage the bose amp puts out is actually less wattage than my stereo puts out into the amp.