The giant sub box is not dead yet. I've come up with this driver to do a double duty either in a ported or sealed environment. I'll be using 2 drivers in parallel and the specs are: Box Physical VB: 2380L FS: 17.5 hz RE: 7.32 Ohm QMS: 11.94 QES: .43 SD: 1159 Cm2 VAS: 423.2 L XMAX: 14 mm LE: Unknown but I think it is 2.39 MH QL: 7 QA: 120 QP: 80 Ports: 2 Port Size: 8" Port Length: 28.33 Cm FB: 13.7 hz F3: 12.36 hz The port will probably be made square (10"x10")instead of 2 round ones to make it easier to seal off if I decide to go that route. Any thoughts about how well this will work either ported or sealed will be appreciated. I'm looking for low end extension and not just raw volume. Thanks!