did 138.6 at the headrest off an RF t400-2 with a 15" crystal comp x2.
as for what you should run, that's tough, a 15 in a huge box as everyone else suggested would work though, maybe an 18" if you have room. Maybe an 18" kicker CVR
143 dd 3518 on pos pyramid 2ch wired to 1 ohm.. getting 3-400, box is 6.8@36hz port is 4"t by 36"w total of 126 sq " of port, 00 durango,...... waiting on saz-2000 to get in