all i have to say is i had 2 Kicker 15" L7's in a coustom ported box and it sounded real good. but when i put this thing in a sealed Qlogic box (crap) it was louder than the kickers. this thing is CRAZY!!!!!!!!!!!!!!! my ears were actually bleeding from the force it put out.
I would have paid $500 for this thing. it is AWESOME!!!
i have 3 HE's in my truck and it is crazy. It hits so good.
These Subs are amazing, I have 2 of them in a custom sealed box in my 2001 Sunfire GT and they pound so loud, you can hear me from a 1/2 mile away. I'm running 150 watts RMS to each. They sound amazing too, very clear and hard hitting, best sub for the money. They're louder than 2 12" Phoenix Gold's and Pioneer's. Simply Amazing. They wouldn't be Rockford if they weren't the best.
I have one of these in my ranger and it hits so hard it's not even funny. If you're looking for a sub get this one.