Originally Posted by Danfordman
I traded a VW Jetta GLI for my 328i and the factory unit sucks. I added an aftermarket XM receiver routed through th usb port and now it really sounds like ass. My VW's factory Bose system kicked ass, I can't beleive BMW audio is so lousy for such a bad ass car. So I want a kick ass system however I need to get there. Amp is a must! Speakers are also a must! So Im trying to build a better sound system in a nutshell.
You need to start identifying
which is the OEM system installed from factory in this car.
Anything else is guessing and a waste of effort.