“Does a new wireless speaker system need to be purchased? Can an older 5.1 wired one be used?”
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The surround selection you choose 5:1 7:2 9:2 is all based on what your receiver can do. Tv has nothing to do with surround. My advise, add a second inexpensive sub to your 5:1 by splitting the sub cable with a y. Turn one sub to 60 Cycles, the other 160. Put them at far ends of the room.
Sorry, there was a problem. Please try again later.The LG 86 inch Class 4K Smart UHD TV w/AI ThinQ® (85.6'' Diag), Model # 86UM8070PUA has an Optical Digital Audio Out in the back that can be connected to any external receiver, Home Theater System or Soundbar that has an Optical Digital Audio In regardless of whether those devices are old or new. It also supports Bluetooth (ver 5.0) and can be paired with any Bluetooth enabled device regardless of whether it is old or new so you can stream audio from the TV wirelessly via Bluetooth to the devices...^IFV
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