I had to do it to the aftermarket kickers. The stock 3.5"s sound like mud, the kickers actually brought some life to the sound but the tin tweeter produced some ugly high pitch sounds that I couldn't tame down using the factory equalizer. I can't remember what ohm resistors I used, it was about a year ago. I even took a picture and meant to post it to the forum but other things came up. Perhaps this weekend I'll pull out one of the speakers and snap a pic, I dont think I screwed them in so it should be easy enough.
Thanks I would really appreciate the extra effort for me! after I hooked them all up i know exactly what you are talking about. Its like the high hats in every song got an extra kick in volume. besides that I am very happy with the speakers
LineX RRO Sliders and Bumper Bar; Rigid D2 Fog lights
Aftermarket Kicker 3.5 speakers, Apline type R 6x9, 10" sub and 8" sub preloaded enclosure powered by Apline 500w mono amp