Menu Options (GPB18V‑3C)

The menu selection is partially dependent on the audio operating mode of the radio.

<EQ>
Sound menu: You can adjust the treble <TR> and the bass <BA> within a range of –5 to +5.

<MSS on>/<MSS off> (for Bluetooth® audio source)
Multi-Speaker Stream menu: You can start or stop the transmission of the current playback via Multi-Speaker Stream.