I'm looking for a 18" speaker cabinet that is 4 ohms and will handle close to 1000 watts RMS. It seems that everything out there (Bag End, SWR) is rated at 8 ohms and only handles a few hundred watts of power. Any custom cabinet makers out there that can build something like this? I'm looking for some serious bottom end for outdoor shows. My 2 Bag End S-15Ds are all right, but they just don't have the deep lows I'm looking for. Thanks!