Studio Spot 575 reset problem

I'm currently running two Studio Spot 575s off two separate 20 amp wall outlets, and just the other day they both started to reset and home periodically throughout the show. While programming prior to the show, one reset itself during a two hour period, but during the show when they go into heavy use, they'll reset and home repeatedly after about a half hour. I also have two Studio Spot CMYs that I've plugged into the same power source and I have no problems.

I should also note that these are on the same power as a 100 amp line array audio system ( I know, not the right way, but it's my only available power). The electric was newly installed. Wasn't having this problem on the old electric.

I'm inclined to say it's a voltage drop issue, as this started happening with two units on he same day, but any suggestions would be appreciated.
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