trevelli

I currently have the amp inputs wired to the rear speakers. There is almost no bass coming out, I suspect the low range bass is blocked in these rear speakers. Anyone know a good place to tap the factory system for a subwoofer amp input? Front speakers? Anyone know what color wires/where to tap them? This is a Non-Mark Levinson system. Any help is appreciated!

Did you ever figure this out? I'm at the same place right now. I have an amp wired up High Level Inputs to the rear speakers, and very ugly bass coming out. Where did you end up tapping the wires? What color wires did you tap? I see the amp behind the drivers seat, just wondering what input/output to tap into. I have a remote bass controller, so adjusting volume from the fronts wouldn't be too terrible. What is "TIS"... how do I get a wiring diagram for this car? Thanks! Trevor