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Hi there, John. Thank you for reaching out! We understand that you'd like to connect your Sonos soundbar and surround speakers to your LG 48” Class B4 Series OLED TV (OLED48B4PUA). Your TV supports multiple connection options for external audio devices, and here’s how you can set it up: HDMI eARC (Recommended for Best Audio Quality) Connect your Sonos soundbar to the HDMI eARC port on your TV using a high-speed HDMI cable. Go to Settings > Sound > Sound Out and select HDMI (eARC) for audio output. Enable eARC under Advanced Settings for high-quality Dolby Atmos support. Optical (TOSLINK) Connection If your Sonos system supports optical input, connect it to the TV’s optical digital audio output using an optical cable. In Settings > Sound > Sound Out, select Optical as the audio output. Bluetooth Connection (For Limited Use) Some Sonos speakers support Bluetooth, but for best performance, HDMI eARC is recommended. If using Bluetooth, pair your Sonos system through Settings > Sound > Sound Out > Bluetooth Device Selection. https://www.bestbuy.com/site/lg-48-class-b4-series-oled-4k-uhd-smart-webos-tv-2024/6584787.p?skuId=6584787 If you need further assistance with setup or settings, please send us a private message on social media @LGUSSupport, and our team will be happy to assist you further. Enjoy your immersive audio experience! —Renzo
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