Just picked up a 2004 M3 Coupe...
I got the Harman Kardon option, not as sweet as I expected (by the way it still has the subwoofer button).
Need some suggestions on possibly adding an amp, or powered subwoofer without voiding the warranty. From the info I've gather thus far this may not be possible. It's like the system is on the verge of hitting hard, like a Bose, but just doesn't get there.
Any suggestions?
Plus, will Harman Kardon send me data sheets on the system showing a wiring diagram, power requirements, load capacity...blah blah blah, basically the specification documents.
I got the Harman Kardon option, not as sweet as I expected (by the way it still has the subwoofer button).
Need some suggestions on possibly adding an amp, or powered subwoofer without voiding the warranty. From the info I've gather thus far this may not be possible. It's like the system is on the verge of hitting hard, like a Bose, but just doesn't get there.
Any suggestions?
Plus, will Harman Kardon send me data sheets on the system showing a wiring diagram, power requirements, load capacity...blah blah blah, basically the specification documents.