Stereo Channels; Connector Panel And Main Section - Behringer EURORACK UB1222FX-PRO User Manual

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EURORACK UB1222FX-PRO User Manual
MUTE LED
The MUTE LED indicates that the relevant channel is muted.
CLIP LED
The CLIP LED lights up when the input signal is driven too high. In this case,
lower apparent frequency increase on the channel EQ to avoid distortion.
For example, lower the mids and the highs somewhat to emphasize the bass.
If you don't wish to change the EQ settings under any circumstances, try lowering
the TRIM control somewhat (counterclockwise).
If you inserted an external effects processor via the insert connector
(e. g. a dynamic processor), then you should also control its output signal level.
It should not be higher than its input signal level (0 dB).
The channel fader determines the level of the channel signal in the main mix.
◊
Attention: Since the aux path for the effect processor is connected
post-fader, the channel fader has to be turned up in order to get this
channel's signal to the effects processor!

2.2 Stereo channels

2.2.1 Channel inputs
Fig. 2.5: Stereo channel inputs
Each stereo channel features two line-level inputs on 1/4" connectors for left and
right channels. Channels 9/10 and 11/12 can also be used in mono if you only use
the connector labeled "L."
Both channels 5/6 and 7/8 feature an additional balanced XLR input for
microphones with available +48 V phantom power.
All stereo channel strips have a TRIM control for level setting. In those channels
in which a mic input is present in the channel, the TRIM control has two scales:
just like in the mono channels, there is a 0 to +40 dB scale that shows the
preamplification of the mic signal; the +20 to -20 dB scale shows the sensitivity
for the corresponding input level that is applied to the line input.
Both inputs can also be used with balanced or unbalanced connectors.
2.2.2 Equalizer stereo channels
The equalizer of the stereo channels is, of course, stereo. The filter characteristics
and crossover frequencies are the same as those of the mono channels. A stereo
equalizer is always preferable to two mono equalizers if frequency correction of a
stereo signal is needed. There is often a discrepancy between the settings of the
left and the right channels when using separate equalizers.
2.2.3 Aux sends stereo channels
In principle, the aux sends of the stereo channels function in just the same way as
those of the mono channels. As aux send paths are always mono, the signal on a
stereo channel is first summed to mono before it reaches the aux bus.
2.2.4 Balance, mute switch and channel fader
BAL
The function of the BAL(ANCE) control corresponds to the PAN control in the
mono channels.
The balance control determines the relative proportion between the left and
right input signals before both signals are routed to the main stereo mix bus.
The MUTE switch, MUTE LED, CLIP LED and channel fader function in the same
way as the mono channels.

2.3 Connector panel and main section

Whereas it was useful to trace the signal flow from top to bottom in order to gain
an understanding of the channel strips, we now look at the mixing console from
left to right. The signals are, so to speak, collected from one point on each of the
channel strips and then routed to the main section all together.
2.3.1 Monitor send and FX send channels
0 0
FX TO FX TO
MON MAIN
+15 +15
MON F X
MUTE MUTE
10 10
0 0
10 10
15 15
20 20
25 25
30 30
40 40
60 60
MON SEND F X SEND
Fig. 2.6: Aux send controls of the main section
A channel signal is routed to the MON(ITOR) send bus if the MON control is turned
up on the corresponding channel.
MON SEND
The aux send control MON SEND acts as master control for the monitor bus
and determines the level of the summed signal that is taken from the mixer via
the MON SEND connector and that can for example be fed to an amplifier for
monitor purposes.
Using the audio signal from this output, you can also feed a subwoofer if you
don't require stage monitors. To this end, you should implement a crossover in
your signal path pre-subwoofer and pre-amplifier, so that only low frequencies
are fed into the subwoofer. You can achieve the same effect by using the built-in
graphical equalizer. Lower all frequencies above 160 Hz and assign the equalizer
to "Monitor".