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using headphones. This feature employs carefully designed signal cross-feed, filtering and delay circuits
to simulate hrtf (head related transfer functions).
PRESS AND RELEASE BUTTON:
• Toggles the speaker DIM function on and off.
PRESS AND HOLD BUTTON:
• Toggles the headphone x-feed mode on and off.
MONO / (L-
R
) - The multi-function MONO / (L-R) button controls the MONO and the LEFT minus RIGHT
features.
MONO sums the left and right channels and provides this signal to both the left and right channels of
the speaker and sub outputs (if stereo sub is configured). The headphone output also becomes MONO
if the headphone mono control is enabled (configured in SETUP). When speaker / headphone MONO is
active, the switch is lit solid yellow.
L-R subtracts the right channel from the left channel and provides this signal to both the left and right
channels of the speaker, sub (if assigned) and headphone outputs. When L-R is active, the button
flashes yellow.
PRESS AND RELEASE BUTTON:
• Toggles the speaker / headphone MONO (if L- R is disabled). Headphone MONO can be disabled in SETUP.
• Disables L- R if L- R mode was active.
PRESS AND HOLD BUTTON:
• Toggles the L- R monitor mode on and off.
MON>CUE (SPL CLEAR) -
The multi-function MON>CUE/(SPL CLEAR) button controls the MONITOR TO CUE
and the SPL PEAK CLEAR features of the system. Normally, the CUE output is sourced via the CUE input.
Engaging MON>CUE routes selected control room monitor source to the CUE output. When MON>CUE is
active, this switch is lit solid green. When mon>cue is active, this switch is lit solid green.
The type 2 SPL meter in the m905 RCU can hold the peak SPL measurement level (configured in SETUP).
The SPL CLEAR function resets the displayed peak level.
PRESS AND RELEASE BUTTON:
• Toggles MON>CUE on and off.
PRESS AND HOLD BUTTON:
• Resets the SPL peak meter reading on the display.
TALKBACK -
The talkback button controls the summing of the talkback mic signal with the cue output. The
talkback system of the m905 has many options that are configured in setup. One option changes the op-
eration of the talkback switch between a momentary and latching control. In momentary operation, the
talkback will be engaged only as long as the talkback switch is pressed. In latching control, pressing and
releasing the talkback switch toggles the talkback on and off, so you can leave talkback engaged without
holding the switch.
Another configuration option selects the talkback mic source as the RCU mic, external mic or either.
When either the RCU or the external mic talkback are enabled, the talkback switch is lit solid red. While
the RCU talkback mic is active, the SPL meter is disabled. This is indicated on the SPL meter display.