Originally Posted by spensley
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If you haven't already done it, it's got to be worth $10, prior to spending $120!!!
Quite a few members are raving about it - I have it planned in the next couple of weeks.
I walked out of Radio Shack $13.49 poorer but increased the sound quality of my stock system immensely. pelked1 did some great research and posted some nice walk-thru's. Others too have contributed good info on different frequencies that the caps will cut off ... definitely worth a read and the $$.
As to the mats ... IMO, my XF is so quiet sitting inside that the stereo sounds awesome, and even cranked, windows up it's not that loud outside.