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You can't! I'm really disappointed with Sony.
Sorry, there was a problem. Please try again later.If you are streaming music to the device via Bluetooth, you can use the EQUALIZER built into your application to control bass/treble. For example, I use the VLC app on my Android phone to send music directly to the speaker and VLC has a built-in EQ that allows you to tweak the sound using a graphic EQ. Once you get it dialed in correctly, the speaker sounds VERY good. Hope that helps....
Sorry, there was a problem. Please try again later.Hi there! it doesn't have an option to adjust the bass or the treble. ~Ralph
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