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The LG SUPER UHD 4K HDR Smart LED TV - 75" Class (74.5" Diag), Model # 75SJ8570 has an Optical Digital Audio Output on it that can be used to connect to an external receiver, Sound Bar or Home Theater System that has an Optical Digital Audio Input on it. Check your owner's manual for your sound system to see if it can be programmed to take commands from another manufacturer's remote control. If it can, it should have a code that you can use. The Universal Remote Control feature in the TV allows you to control devices such as Set-Top Boxes, Blu- ray Players or Home Theater Systems using the LG Magic Remote that is an included accessory with the TV...^IFV
Sorry, there was a problem. Please try again later.In my opinion the built-in speakers (with subwoofers!) are actually so fine that you don't need external speakers. Of course, if you want to go full-fletched home theater style sound you want to connect it to a Audio/Video Receivers using a Dolby Atmos setup, or at least a 5.1 setup. As this TV supports ARC, you can connect it to a soundbar, too. This automatically turns of the built-in speakers providing that the soundbar support HDMI CEC control.
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