Originally Posted by Radioactive
You might give Earthquake a call. I think they're in your area. If you have the Premium Sound system, and you want to add an amp for the woofers, you might take a look at this sub/woofer harness.
I think this would separate your woofers after the crossovers and give you the ability to control the lower end.
Ah thanks for the info and the link! Now I am seriously thinking about upgrading the in-floor subs with the Earthquake SWS's and stringing a dedicated amp to them. Just need to see if I can find a good spot for the amp and determine how much interior surgery will be needed. I didn't mind taking apart the interior of my old civic to run wires and such but with the X3 I am reluctant to tinker. It would be awesome if the stock amp were capable of driving the Earthquakes but that would be an unrealistic hope.