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Thank you for raising your concern regarding LG Sound Bar (S80QY) model.The LG S80QY soundbar can be connected to a TV using an HDMI or an Optical connection. If you are currently using the HDMI cord and finding the sound to be quieter than expected, switching to an optical connection may not necessarily make it louder. The soundbar's volume is influenced by various factors, including the audio source, the soundbar's settings, and the TV's settings. You can download its owner's manual through this link for more information: https://www.lg.com/us/support/product/lg-S80QY.DUSALLK. ^Cris
Sorry, there was a problem. Please try again later.No unfortunately changing the source of audio will not change the ability of the soundbar, or sub to be louder. I bought this soundbar and returned it because i felt like not matter how high my settings or volume was i couldn't hear alot of noises, especially the dialog, and subwoofer.
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