Well i got a Mach1000 audio system in my mustang right now and im thinking of upgrading to a little better equipment but retain the stock head unit and the stock amplifiers and subwoofer boxes.

for those of you who dont know about the Mach1000 is consistes of 6 speakers, 2 sub-woofers, and 6 amplifiers. with a custom enclosure in the truck to house 4 of the amps and the 2 subwoofers which are 10" in size.

now what i was wanting to do is replace the 10's with a better set like kicker, or alpine. but once again i want to retain the factory amplifiers. and i was also wanting to replace the speakers through out the car which in clude 4 in the front doors and 2 on the rear deck. i know replacing the front and rear speakers wont be a problem cause i can get speakers direct fit to the holes and get the harness to convert the plug jack into the 2 wire to plug into the speakers.

the subs are the real question, i just dont want to have and rip out all the Mach audio system just to install the new stuff. any help would be great guys.