Double post.. <p><A HREF="http://forums.swedespeed.com/zerothread?id=61907" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=61907</A><p>You could also try the V70/XC70 forum. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0">
This has been covered in other posts on the forum try searching on hu803 or hu-803 and amplifier.<p>Yes, you can use a non volvo amp, but you will have to make your own cable or adapt a Volvo cable. The pin-outs are described in the other posts. It is not a drop-in. Most swedespeeders that are using an aftermarket amp have also replaced their HU-803 with an aftermarket head unit. I recommend this option.