I am looking into keeping my OEM DSP head unit but replacing the factory amp and speakers as well as putting a JL stealth box where the exsisting woofers are in the trunk.
With a balanced 5 volt out going to an aftermarket amplifier located where the crap stock one is w/ nice components. Then mount the mono amp in the trunk because I do not have Nav or CD changer back there. Or just get a 5 channel amp.

Something like that...
Any thoughts?