Great point Gary.
I take a Voltage Regulator with me on all gigs. Electrical service at some of the venue's I play at are quite questionable, especially weddings with outdoor tents.
The voltage regulator will ensure 120 voltage for as long as the battery is charged and also clip any spikes above 120.
I use a small APC unit which is heavy, but very portable.
Al
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Al
Pa4x - LD Systems Maui 28 - Mackie Thumps