If any one of you haven't seen those 13W7's you need to see them, the cone movement is huge.......those things will punch windows out. Your talking about a huge amp on each or it will over heat, -1 power wire, oversize alternator and a couple of battery's, not to mention the front stage.
Jim
We just put (2) 13w7 in my buddies superduty with a jl 500/1 on each....not to impressed for the money. And Im a HUGE JL fan