“What is the set up device included with the unit for. It’s round with a wire and a plug.”

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• Its for your speaker balance when you set it up. Plug it in, and the receiver will instruct you on where to place it in your room so the system can balance your speakers

  Answered by PapaRan 1 week ago

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• Hello --- The device that you are referring to is the setup microphone, which is supplied with the TXSR494. Thank you Onkyo

  Answered by Onkyo Team 1 month ago

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