L3Harris XL Series Operator's Manual page 97

When the External Speaker option is enabled in the personality, assigning the External Speaker
function to a programmable button allows for additional control of output audio between speaker
1 and speaker 2.
• When the programmable button configured for External Speaker is first pressed (active), the
output volume of speaker 1 will stay fixed and speaker 2 will unmute at the current volume
level (if previously activated, speaker 2 will unmute at its last registered volume level prior to
going inactive). Any further adjustments to volume level will only impact speaker 2.
When the programmable button configured for External Speaker is pressed again (inactive),
•
speaker 1 will continue to play audio at its current volume level and speaker 2 will be muted.
Any further adjustments to volume level will only impact speaker 1.
Speaker 1 and Speaker 2 are defined by the physical connection to the radio's
control head and VCH. See the XL Mobile Installation Manual, 14221-1850-
4000, for additional details.
14221-1850-2000, Rev. C
97