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CAUTION! When phantom power is switched on, make sure that any channel you are plugging a
mic into is muted and all monitors and auxs are at minimum. Otherwise there will be a loud
pop in the PA. This is normal. It is best to plug all mics into their respective channels with the
phantom power switched off. This reduces noise in the PA and reduces the chances of the mic
being damaged.
16. LOW CUT: A low cut filter with an adjustable corner frequency (10 to 300 Hz). It is used to filter
out rumble, wind noise, breath thumps, stage noise, and other low frequency components that rob
power from the amplifiers and muddy the signal. To disable the filter, set it at the minimum frequency
setting.
17. LED METER ARRAY: A 12-segment peak reading LED array monitors the level of the
corresponding output. The 0 dB reference level corresponds to 0 dBu at the 1/4" jacks (+4 dBu at
the XLR jacks). The right meter array is also used for PFL, and displays the level of the PFL mix
when any PFL switch is pressed.
18. AFL: Connects the channel’s output signal (post fader) to the AFL mix. This mix is the default
headphone and wedge mix. Its LED will light when this switch is pressed to identify which signals
are included in the AFL mix. At least one source should be assigned, or there will be no headphone
or wedge signal unless the PFL is active.
19. MONITOR MUTE: Mutes the monitor output. Its LED will light when muted.
20. MASTER FADER: Sets the overall level of the signal that is sent to the output jacks. The opti-
mum setting for this control is the “0” (unity gain) position.
21. TALKBACK LEVEL: Sets the level of the talkback mic that is sent to monitors 1-6 and the
left/right (if assigned). Engaged by the enable momentary switch.
22. TALKBACK MIC INPUT: low-impedance balanced mic input with phantom power (#15). Used
to communicate with stage personnel or talent.
23. TALKBACK ASSIGN: The talkback signal is always sent to monitors 1-6. This switch adds a
send to the left/right.
24. TALKBACK ENABLE: Engages the talkback mic while held down. The signal is routed
through the talkback assign (#23) switch and controlled by the talkback level (#21).
25. PFL LEVEL: This control sets the level of the PFL mix that is sent to the headphones and the
wedge outputs when the PFL is active. In normal operation, this control is adjusted to set the PFL
level to match the AFL level.
26. HEADPHONE OUTPUT: This stereo jack TRS provides drive for the headphones. The level is
set by the headphone level control. Tip=Left, Ring=Right, Shield=Ground.
27. HEADPHONE and WEDGE LEVELS: Independent adjustments of the headphone and wedge
outputs. The source changes from the AFL mix to the PFL mix whenever the PFL is active. If no
output is assigned to the AFL mix, there will be no signal present until a channel is assigned to the
PFL mix. The wedge level will diminish (-20 dB) when the talkback mic is engaged to prevent
feedback.
28. PFL ACTIVE: This LED flashes when the PFL is active and its signal is overriding the
standard AFL mix in the headphone and wedge outputs and at the right meter. The signals that
are present in the PFL mix can be seen by the individual PFL LEDs.
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