It does 145.5 dB @ 35 Hz with 860 watts actual clamped power after rise at that frequency. I have the prototype 2500D on there but have super high rise @ 35 hz in this box.
Box is really not great for them -- we modified another box that was laying around the shop just to take a listen. Sure does sound good, though! The camera doesn't pick up the flex very well until the end on the roof inside the vehicle.