had a problem last night, 8 ohm monitor rated 225 watts rms, QSC PLX 2402 amp. One monitor on one side of amp, other side of amp open. Drummer's wedge. Drummer wanted kick in his wedge, so I obliged. Drummer was happy with it, but amp would red light and then shut down, cycle, come back on, everything's fine for a while, then it would redlight and shut down again, then back on. Normally I would think it was low voltage, but the other amps were on the same circuit, and none of them had a problem. I know when a voice coil heats up, it changes the impedence, so could this have in some way triggered the shutdowns?