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The speakers, like the soundbar, need to be powered to work, so yes, they need to be powered by electrical outlets. They do not need to be connected to each other.
Sorry, there was a problem. Please try again later.The rear speakers for the LG 7.1.3-Channel S90TR Home Theater Soundbar with Wireless Subwoofer and Rear Speakers, Dolby Atmos®, WOW Orchestra - Black, Model # S90TR, connect to each other and only one has to be plugged into a wall receptacle for power...^Ivan
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