no way that amp can be a 2 channel and be 1 ohm stereo capable. i mean, it COULD be, but what are the chances.
but to the OP, even if you could do that, 1500w would fry the living shit out of that level 3.
wasn't really going off his specs just giving an example of how bridged worked and how you should run one coil of one channel and the other coil off the other channel if you had the option to do so