Thanks bro. I still have a small alternator whine, but ordered an Audiocontrol Matrix that I'm going to try and use to get a cleaner audio signal to the DSP. If that's not it... must be something with the wiring. I'll find it eventually. When I have time to work on it anyway. It's a minor whine that I don't notice most of the time.

Here you go OP. I removed my previous post that had DSP pinout. Sorry for the size, I wanted it easy to read and/or print. This is the correct pinout for the "HiFi Loudspeaker System" vehicle option 676. Also, I verified that the wire colors DO NOT change between the amp and the door. At least not according to the diagrams.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)