Actually the XPA-1 has no issue plugging into a standard outlet. The XPR series which is their upcoming super high power amps do require a 20a line and plug. But the owner stated in their forum that you could just buy an adapter if need be, they had to do it the other way so they could pass the inspection stuff. With that said you would not be able to run the XPR at full tilt on a 15a line so... It's up to you.
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