It's only 315 watts/VS the 500-watt Z-5500. And, you need to plug in the speakers to a wall outlet to power the speakers and receiver. Each of the two remote speakers has it's own built-in receiver and amp--not a good thing for gigging, especially in a world of cellular telephones.
Not for me,
Gary
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Travlin' Easy
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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.)