# Adjusting RTU Internal Speaker Volume

- The loudness of the front panel speaker can be adjusted via the small square variable resistor (trimpot) on the main circuit board (CIGB). This trimpot is marked SPKR and requires a small, flat blade screwdriver to make the adjustment.
- This setting also controls the volume delivered to jack J1, marked SPEAKER OUT, which may be used to drive external speakers, or other audio devices.
- This trimpot cannot be used to turn the speaker sound off completely. If you wish to silence the speaker completely, use the Alarmware™ configuration setting (Configuration | Devices | Phone Config) provided for that purpose.