Extron Electronics RAC 104 - Manual (Page 21)

RAC 104 • Installation and Operation
Front Panel Controls
VOLUME & TONE CONTROLLER
1
2
3
4
BASS
TREBLE
VOL
ADJUSTMENTS
AUDIO CONTROLS
A B
RAC 104
2 3 1 4
1 Power LED — Lights to indicate that the RAC 104 is on.
2 Channel selector buttons and LEDs — The RAC 104 has two
channel selector buttons, one for channel group A (channels 1
and 2) and one for channel group B (channels 3 and 4). Press
and release these buttons to select the channel(s) to adjust.
When a channel is selected, the corresponding LED lights.
Pressing the buttons repeatedly cycles through four possible
selections:
Both LEDs on — both channels selected (tied, for stereo audio)
When both channels in a group are selected, they will be
tied togther once the user turns the adjustment knob.
The RAC 104 automatically sets both channels to the
same volume and tone levels and any future changes
will affect both channels simultaneously. To cancel a tie,
press and release the channel selector button again and
then turn the adjustment knob. See “Channel ties” in
this chapter for more information.
LED 1 (or 3) on — mono channel 1 (or 3) or the left stereo
channel selected
LED 2 (or 4) on — mono channel 2 (or 4) or the right stereo
channel selected
Both LEDs off — no channel selected
Groups A and B cannot be adjusted at the same time.
Pressing the button for one group will cause the LEDs
for the other group to turn off.
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