I bought my P5 used from a local dealership and it didn't come with the spare mounted subwoofer. Later as I was testing the stereo I found out the rear speakers weren't working so I brought it back to be fixed under warranty. Turns out someone cut the lines to the rear speakers. Doesn't make much sense but I figure they must have pulled the subwoofer at the same time. Anyway, wanted to know if anyone had upgraded their spare mounted sub and wanted to sell it off at a reasonable price (i.e. cheap).