Matt...weird request. Can you help me with a 2012 Jaguar XF? I want to install a small sub in the back. A 6" sub would more than suffice or a pre-powered sub such as this (similar to the 370Z's sub):
Blaupunkt 6902A GT Power Series dual 6"x9" powered subwoofer at Crutchfield.com
I found this thread on the Jag forum where someone installed a pair of subs and posted the details:
Anybody have any wiring diagrams or location for amplifier for the audio system.... - Jaguar Forums - Jaguar Enthusiasts Forum
The car's standard audio has terrific highs, and good mids. But bass is poor and I'd like to alleviate that with something very simple. Would a sub that small require its own amp? I sort of doubt it does, but I don't know crap.