EURORACK UB502/UB802/UB1002/UB1202
Control elements and connectors 5
Mono channels2.1
Microphone and line inputs2.1.1
Connectors and controls of mic/line inputsFig. 2.1:
MIC
Each mono input channel offers a balanced microphone input via
the XLR connector and also features a switchable +48V 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 loudspeakers. Please also note
the instructions in chapter 2.3.5 “Phantom power and
LED displays”.
LINE IN
Each mono input also features a balanced line input on a 1/4"
connector. Unbalanced devices (mono jacks) can also be con-
nected to these inputs.
Please remember that you can only use either the mi- +
crophone or the line input of a channel at any one time.
You can never use both simultaneously!
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.
Equalizer2.1.2
All mono input channels include a 3-band equalizer, except for the
UB502, which is equipped with a 2-band EQ. All bands provide
boost or cut of up to 15 dB. In the central position, the equalizer
is inactive.
The equalizer of the mono input channelsFig. 2.2:
EQ
The upper (HI) and the lower band (LO) are shelving lters that
increase or decrease all frequencies above or below their cut-off
frequency. The cut-off frequencies of the upper and lower band are
12 kHz and 80 Hz respectively. The mid band (UB802/UB1002/
UB1202) is congured as a peak lter with a center frequency
of 2.5 kHz.
LOW CUT
In addition, the mono channels (UB1002 and UB1202) are
equipped with a steep LO CUT lter (slope at 18 dB/oct., -3 dB
at 75 Hz) designed to eliminate unwanted low-frequency signal
components.
FX sends, panorama and level adjustment2.1.3
The FX send/panorama/level controlsFig. 2.3:
FX (UB802/UB1002/UB1202 only)
FX sends (or AUX sends) enable you to feed signals via a variable
control from one or more channels and sum these signals to a
bus. The bus appears at the console’s FX send output and can
be fed from there to an external effects device. The return from
the effects unit is then brought back into the console on the aux
return connectors (UB802) or normal channel inputs. Each FX
send is mono and features up to +15 dB gain.
As the name suggests, the FX sends of the EURORACK mixing
consoles are intended to drive effects devices (reverb, delay, etc)
and are therefore congured post-fader. This means that the mix
between dry signal and effect remains at the level determined by
the channel’s aux send, irrespective of the channel fader setting.
If this were not the case, the effects signal of the channel would
remain audible even when the fader is lowered to zero.
PAN
The PAN control determines the position of the channel signal
within the stereo image. This control features a constant-power
characteristic, which means the signal is always maintained at a
constant level, irrespective of position in the stereo panorama.
LEVEL
The LEVEL control determines the level of the channel signal in
the main mix.
PEAK
The PEAK LED’s of the mono channels illuminate when the input
signal is driven too high, which could cause distortion. If this hap-
pens, use the GAIN control to reduce the preamp level until the
LED does not light anymore.
Stereo channels2.2
Stereo line inputs2.2.1
Stereo line inputsFig. 2.4:
LINE IN
Each stereo channel has two balanced line level inputs on 1/4"
jacks for left and right channels. If only the jack marked “L” (left)
is used, the channel operates in mono. The stereo channels are
designed to handle typical line level signals.
Both inputs will also accept unbalanced jacks.
Equalizer stereo channels (UB802)2.2.2
The EURORACK UB802 features a stereo 3-band EQ in each
stereo channel. The lter characteristics and cut-off frequencies
are the same as those in the mono channels.
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