I have a ground fault surge protector on my system, which also tells me if there is a bad grounding system in the electrical circuitry. Nice feature that will protect you from getting a bad electric shock.

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)