User Manual
Allen & Heath     19     XB-14 User Guide 
T1
LR
PAN
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SIGNAL
PFL
PEAK
PGM
FDR
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5
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14 
TELCO CHANNELS 1&2 
 ON Switch 
This mechanically latching switch operates the TELCO channel mute cir-
cuitry, turning the signal to the PGM, MIX B and Aux buses on or off. 
The switch is illuminated green when pressed. 
There is an option to disable the switch (make permanently ON) using the 
option switches on the rear-panel. If this is activated, then the switch will 
be illuminated green regardless of whether it is pressed or not.
SIGNAL & PEAK LEDs 
The Signal LED illuminates when the pre-fader signal level is above –15dB. 
The Peak LED illuminates and stays on for around 0.5 seconds when a peak 
level is detected (pre-fader signal) within 5dB of clipping. 
PFL Switch 
The PFL (Pre-Fade Listen) switch sends the channel signal to the PFL bus 
and subsequently to the headphones/CRM speakers and the main L R me-
ters. Used for checking the audio signal before raising the fader or switching 
on the channel or raising the fader. 
Fader 
The 100mm fader controls the level of the TELCO channel signal to the left 
& right PGM bus, MIX B bus and post fade Aux. 
The TELCO channel faders have fader start switching logic signals available 
on the rear-panel remote interface connectors for control of external 
equipment. 










