I didn't want to start a new thread, so thought I'd use this one.
How have people connected aftermarket subs? I just installed tweeters (pnp thankfully) from a wrecked 135i, so next up is adding some bass. I'd rather a 10 or 12" sub in the boot than adding/upgrading underseat OEM items...
Any info would be appreciated. I have the base spec audio system.
