The T39 has dual BP102's in a 22" width and the OT 1-12 has a Deltalite 2512 with cross firing 12 piezo's.
I dragged the cabs into the back yard and used my backup bass amp which is a Hartke 5000 biamp(250/250) crossed at about 150 hz to play a bass solo for the neighbors. All I can say is it's way, way more than I would ever use for a bass rig. The sound was clean and punchy. The low "B" reminded me of a freight train! I have a DR250/ tuba24 setup that is also killer, but this rig is the thunder. For a relatively simple build I highly recomend this setup as the monster bass rig!!
It didn't break but I desided to turn down to keep the house from shaking off of the foundation! 