Amazon.com: Onkyo TX-NR696 Home Audio Smart Audio and Video Receiver, Sonos Compatible and Dolby Atmos Enabled, 4K Ultra HD and AirPlay 2, Black : Electronics
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What is the best choice of speaker impedance setting on AV receiver for Right, Left, Center, Surround Channel with 8 Ohms and Ceiling with 4 Ohms? All the speaker is already installed.