Do i have to loose subs underneath seats in order to have subs in the back of the trunk?

is there anyway i can have both because after installed my subs in the trunk i lost the sub inside of the car

do i have to use some gadget to make aftermarket amp and subs to play like interface kit(peripheral kits)

also where can i get earthquake subs?

thanks guys

Nope, your supposed to run the wiring for your new amplifier off the sub amp on the left hand side of the boot, did u disconnect this wiring and connect it to your aftermarket amp?? shouldnt stop working otherwise. Leave the wiring connected to the stock amp and tap in to it without ruining the original connections :thumbsup:
The only gadget you will need is a line out converter to convert the signal to RCA'S that plug straight in to the aftermarket amp.

You should be able to do it if you use an OEM Interface like the Audison BitOne or the JL Cleansweep. Aswell as the stock setup, rach will let you add amps, so assuming you knew the config of the stock amp in the E60 trunk, and what speakers you wanted to run, you could run your stocks and aftermakret in tandem.

Do this:

http://bavariansoundwerks.com/product/598/...-Series-M5-E60/

ROCKS!!!!

im waiting on them to be on stock so that i can get it.. meanwhile im gonna rewire amp....

Did anyone changed stock amp with aftermarket amp? if so can I use any kind of amp? like alpine?