I'm pretty sure he said without messing with the anc . Llc harness you have to cut the mic witch completely kills the anc. If you want a source signal the rear door speakers are non anc you'll need a loc and a unit that bumps the signal voltage up to 4v or better. Unit being line driver , epicenter, or other bass enhancer. Seems the monopoly of llc harness and information Has overshadowed proven techniques and technology that is very much proven its self . Not a hater not one bit but when your product blocks and dead-end peoples search results wile doing there own research bugs me .