Behringer Europack UB1222FX-Pro User Manual

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.

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.

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.

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.

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FX TO

MON

FX TO

MAIN

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FX SEND

MON

MUTE

FX

MUTE

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”.