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6 EURORACK UB1204FX-PRO/UB1204-PRO User Manual
2. Control Elements and Connectors
This chapter describes the various control elements of your mixing console.
All controls, switches and connectors will be discussed in detail.
2.1 Mono channels
2.1.1 Microphone and line inputs
Fig. 2.1: Connectors and controls of mic/line inputs
MIC
Each mono input channel oers a balanced microphone input via the XLR
connector and also features a switchable +48 V phantom power supply for
condenser microphones.
◊ Please mute your playback system before you activate the phantom
power supply to prevent switch-on thumps being directed to your
loud speakers. Please also note the instructions in chapter 2.4.2
“Voltage supply, phantom power and fuse”.
LINE IN
Each mono input also features a balanced line input on a ¼" connector.
Unbalanced devices (mono jacks) can also be connected to these inputs.
◊ Please remember that you can only use either the microphone
or the line input of a channel at any one time. You can never use
both simultaneously!
LOW CUT
The mono channels of the mixing consoles have a high-slope LOW CUT lter for
eliminating unwanted, low-frequency signal components (75 Hz, 18 dB/octave).
GAIN
Use the GAIN control to adjust the input gain. This control should always be
turned fully counterclockwise whenever you connect or disconnect a signal
source to one of the inputs.
2.1.2 Equalizer
Fig. 2.2: The equalizer of the input channels
All mono input channels include a 3-band equalizer. All bands provide boost or
cut of up to 15 dB. In the central position, the equalizer is inactive.
The upper (HIGH) and the lower band (LOW) are shelving lters that increase
or decrease all frequencies above or below their cut-o frequency. The cut-o
frequencies of the upper and lower band are 12 kHz and 80Hz respectively.
The mid band is congured as a peak lter with a center frequency of 2.5 kHz.
2.1.3 Aux sends
Fig. 2.3: The AUX SEND controls in the channel strips
Aux sends take signals via a control from one or more channels and sum these
signals to a so-called bus. This bus signal is sent to an aux send connector and
then routed, for example, to an active monitor speaker or an external eects
device. The return from an external eect can then be brought back into the
console via the aux return connectors.
For situations which require eects processing, the aux sends are usually
switched post-fader so that the eects volume in a channel corresponds to
the position of the channel fader. If this were not the case, the eects signal
of the channel would remain audible even when the fader is turned to zero.
When setting up a monitor mix, the aux sends are generally switched to
pre-fader; i.e. they operate independently of the position of the channel fader.
Both aux sends are mono, are sourced after the equalizer and oer up to
+15 dB gain.
◊ If you press the MUTE/ALT 3-4 switch, aux send 1 is muted,
provided that it is switched post-fader. However, this does not affect
the aux send 2 of the UB1204FX-PRO.
AUX 1 (MON)
In the UB1204FX-PRO, aux send 1 can be switched pre-fader and is thus
particularly suitable for setting up monitor mixes. In the UB1204-PRO, the rst
aux send is labeled MON and is permanently switched pre-fader.