Interesting - so since I have M490 - is the amp in the radio/headunit currently powering anything - or is it more of a preamp for the external amp? (as noted above, I currently do not have rear speakers)
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2003 Audi A4 Avant 3.0/6MT - Orient Blue/Beige
2002 Porsche Boxster 5spd - Seal Gray/Black
1990 BMW 325i (convertible) 5spd - Red/Beige/Black Top
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