I have been powering a pair of these in my DJ rig with a PV cs400, dual mono >200 watts a side at 8 ohm. I'm thinking about bridgeing the amp and running just one at the full 400 watts at 8 ohms. But I have hesitated because I am not sure if the the 72volts is safe or not. The spec sheet on the speakers says half that. Need I worry?