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How can I adjust the bass and treble?

There are no adjustable tone controls on the Bose system. However, there are some ways to adjust the sound if there is too much bass:

Placing the system near a wall or corner can increase bass. To decrease bass, move the system farther from a wall or corner

TALK RADIO mode: When listening to AM/FM radio, press the PLAY MODE button twice on the remote to turn Talk Radio mode on or off. Turning this on can help voices become more intelligible. (Note: Switching to another station or turning the system off will turn off Talk Radio mode.)