Just a quick update to my remote source dilemma. The solution to my issue was literally right underneath my nose. In the process of removing the side panels in the trunk, I disconnected a 12+ power plug and completely forgot it was there. I'm not sure if the A4/S4 have it, but the alloard has this power source plug in the back. It supply's 12+ when on, and turns off with the ignition.

The installer from Best Buy and I completely disregarded the connector as I told him it didn't plug into anything. Well, I tested the plug, problem solved!

Now I need to decide if I want an "all in one" or do I want to go with a separate amp and sub. I just want the low end filled; not trying to shake the fillings from my daughters teethes when they sit in the back.
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