I do have some alternator whine but only when the tuner module is on, strangely enough. Even theni t's barely audible. I have had my Empeg in 3 vehicles and all 3 did the same thing as far as whine. Only audible in tuner mode.

I had the sled pulled out of the dash last weekend to run the wire for my Sony stalk and it looks like all my wiring was done through the OE harness.