u have stock headunit or iDrive ?
hifi ? what amp are they going to use for your sub?
I have a mono amp and kicker 12" L7 going to install soon had in my previous car, but trying to sell the 12 and get a 10" better (for trunk *******. my cousin has 2 x 12 rockford and i must im impressed it sounds so clear
Current: 2014 X3 28i ///M-Sport| Alpine White| Oyster Nevada| Dynamic Handling| Premium| Cold Weather| Driver Assist| Tech| Xenons| Prem Hi-fi| Escort Passport 9500ix
Past: 11' mbenz c300 4matic sport 9/13 - 8/14 | 07' 328xi sedan 7/12 - 6/13 | 06' cadillac sts v6 6/10 - 6/12