I drive an extended cab pickup. 2 10" subs in a bandpass box with the ports pointed at the back of the two front seats. All 4 stock speakers have been replaced. Front two were replaced by Boston 5.25" with 1" tweeter. Rear two were replaced by Rockford Fosgate 5.25" with 1" tweeter.
[url=http://www.colomar.com/Shavano/bandpass.jpg]Bandpass box setup[/url]
Don't know where the original piece of paper went, but here's the design for the box.
[url=http://img534.imageshack.us/img534/3483/img20101228135001.jpg]linky[/url]
Pic shows my head unit, it's got tons of features, but it's a pain to control without the 6 preset buttons most units have. It has both aux and iPod connections, both are on the rear, the aux cable is visible coiled up in the slot just below the unit and the iPod connector is hidden away with my iPod in the glove compartment
Still a lot of work to do, need to get some sound dampening carpet (Tacoma's are known for road noise), need to clean up the sub wires, maybe get a black strap to hold the box in (thing weighs ~80lbs, dangerous to not have locked down), get a 4 channel amp to replace the head unit amp, distorts much earlier than I'd like. I think it only supplies 17-18 watts per channel (4ohm, RMS), I'm looking for 30-50.
lol, it's not even [i]that[/i] much. The 4 speaker/tweeter combos are $440 total ($220 per pair). Head Unit was $200. Subwoofers were $140 total (on sale, $70 rather than $100). Amp for the subs was $80, supplies 200W at 4ohm RMS into two channels. Some people pay $600 for the subwoofer alone
Pic is of my amp, hard to get a good pic when it's under a seat and it's getting dark out.
[url=http://www.amazon.com/PH2-600-Phantom-Series-Channels-Amplifier/dp/B0032FOKU6]Link to my amp[/url]