um, all of them. lol
take a look at the dp next to a memphis mojo, massive audio dmx, eclipse ti series, the old orion hcca, soundsplinter rl-p, ma audio eho series, sonic fx q, soundstream splx (?), ed A series, among others..
thats just the dp line..obviously they arent the same subs, but all are based from the same tc motor.
..brad, mmats uses a "li" motor on the pro-cast line iirc