JBL's ok but for that amp and only being 1200w and what they're asking for it they're crazy. Your sub (if you have the 12 which I'm assuming you do) can handle 3000w max(1500w each coil at 4 ohm's) if you're looking for an amp that will power it better, cost half as much as the JBL, and give you the ability to fully power another 12 if you put it in then check out this link. I've got 2 of these pushing 2 Lanzar Opti1532 15's in my 92 4 door cherokee with a stand alone battery and 6 farad cap and they pound. I'm not usually a big fan of Boss Audio but I've had alot of friends with smaller systems in the past with Boss Audio amps and they lasted forever.
http://www.onlinecarstereo.com/CarAu...roductID=15846