http://www.the12volt.com/caraudio/woofer_configurationsm.asp?Q=2&I=22#_index
If I'm reading that correctly, you can only wire 2 dual 2 ohm subs at .5, 2 and 8 ohm
To give you an idea of a budget build see my sig.
hu --- 140.00 new
Install kit and wiring 40.00
Subs - 215.00 used
Amp- 123.00 new
Amp wiring 26.00 new
built my own box so 40.00 in materials
And still looking for front and rear comps.
i work in a dodge, chrysler, jeep dealership, most of those body style liberties have extended warranties on the regulators, might be worth seeing if yours was under
it and seeing if you could get some reimbursement from mopar.
noob question, how hard is it to remove the damper material? liberties are notorius for crapping out window regulators, actually grand cherokees too. anyway, just wondering. good luck with build.