Stereo Input Channel; Input Jacks; Aux Sends; Level - SoundCraft LX7-2 Technical Manual

Stereo Input Channel

1 - INPUT JACKS

These high impedance inputs accept 3-pole `A’ gauge (TRS) jacks. Use these inputs for
sources such as keyboards, drum machines, synths, tape machines or returns from
processing units. The inputs are BALANCED for low noise and top quality from professional
equipment, but you can use UNBALANCED sources by wiring up the jacks as shown in
the “Connecting Leads” section on page 22 in this manual, although you should then
keep cable lengths as short as possible to prevent ‘hum’ being induced into the sound
system. Mono sources may be used by plugging into the left jack only.
2 - GAIN
The GAIN control sets the input level to the channel, allowing matching to a wide range
of line level sources.
3 - EQUALISER
HF EQ
Turn clockwise to boost high (treble) frequencies, adding crispness to percussion from
drum machines, synths and electronic instruments. Turn anticlockwise to cut these
frequencies, reducing hiss or excessive brilliance. Set the knob in the centre-detented
position when not required. The control has a shelving response giving 15dB of boost or
cut at 12kHz and above.
LF EQ
Turn clockwise to boost low (bass) frequencies, adding extra punch to synths, guitars
and drums. Turn anticlockwise to reduce hum, boominess or improve a mushy sound.
Set the knob to the centre-detented position when not required. The control has a
shelving response giving 15dB of boost or cut at 60Hz and below.

4 - AUX SENDS

These are used to set up separate mixes for FOLDBACK, EFFECTS or recording, and the
combination of each Aux Send is mixed to the respective Aux Output at the rear of the
mixer. The sends are always PRE-FADE which is most appropriate for Foldback or Monitor
feeds, but note that the Line Inputs on pairs of Mono channels may be used as alternative
stereo inputs if post-fade sends are essential for effects.

5 - LEVEL

The rotary level control adjusts the overall level of the signal which is fed to the Mix or
selected pair of Groups.
6 - ROUTING
The Stereo channel signal is fed either to a pair of Subgroups (switch UP) or the stereo
Mix (switch DOWN), at a level set by the LEVEL control. Stereo 1 feeds to Subgroups 1
& 2, Stereo 2 feeds to Subgroups 3 & 4.
7 - PFL
When the latching PFL switch is pressed, the pre-fade, post-EQ signal is fed in mono to
the headphones, control room output and meters, where it replaces the selected monitor
source. The PFL/AFL LED on the Master section illuminates to warn that a PFL is active.
The Left and Right meters display the PFL signal in mono.
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