I have a MTX Explorer subwoofer and enclosure installed in my 1997 Explorer! I only paid $269.00 for it and it sound quite good considering that the enclosure is plastic and so small! I decided on the stealth aproach for my explorer since I regularly keep it parked outside and figure what can't be seen is alot less likely to be stole!
I have a 5 channelle Soundstream amp, a set of 3 way MB Quart seperates (61/2, 4, 3/4 tweet), 61/2" woofers in the rear, Eclipse tuner/video monitor and Eclipse 12 disc changer!