Increase the "Gain" level so you may hear audio from the Bluetooth channel
- Tune the volume up on "Master Volume" to about 70% (The circle led will fill ¾ of the way)
- Press the "CH Select" button to jump to "CH4", confirm this channel light is the only one on from the channel strip
- Use the "Gain" to increase channel 4 volume
Note: Verify you also adjust the audio source device (Tablet/Mobile).
