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Firstly, you should search for and download the full owners manual from the LG site (https://www.lg.com/us/support/product/lg-S70TR.CUSALLK?tab=1) - it has all the soundbar details. To enable the different speaker modes like Bass Boost, double click the function button (looks like a plug with a tail) on the remote several times while the speakers are connected. Each double click advances it to a different mode, one of which is Bass Boost. The speaker will announce the mode you're in. You can probably do this from the top buttons on the main soundbar too.
Sorry, there was a problem. Please try again later.BASS BLAST (BASS BLAST+) is a sound field on the S70TR LG Home Theater Soundbar with Dolby Atmos® and Rear Speakers, 5.1.1 channel, and as instructed on page 25 in your owner's manual, you have to press the Sound Effect button to select it...^Ivan.
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