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If your surround sound connects thru optical cable or hdmi, I don't see why it wouldn't connect.
Sorry, there was a problem. Please try again later.Thank you for your interest in the LG Smart webOS (70UQ7590PUB) model. Yes, The LG 70UQ7590PUB is compatible with universal surround sound systems. The TV is likely to have multiple audio output options, such as HDMI-ARC, optical, or analog audio outputs, which can be used to connect to a surround sound system. You can download its owner's manual through this link for more information: https://www.lg.com/us/support/product/lg-70UQ7590PUB.AUS. ^Cris
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