Allen&Heath GS3000 - Manual (Page 13)

GS3000 U SER G UIDE 13
D
UAL
S
TEREO
I
NPUT CHANNEL
DUAL STEREO INPUTS – Two dual stereo input channels are included as standard.
Stereo inputs 1 & 2 are fully featured with 4-band EQ, full aux and group routing,
automated mute and 100mm fader. They are ideal for stereo instruments and MIDI
sequenced sources. Stereo inputs 3 & 4 are ‘compact’ stereo inputs again with
automated muting, ideal for returning effects to the mix. The stereo channel inputs are on
separate TRS jacks.
UPPER STEREO INPUT CHANNEL ST. 3 / 4
INPUT LEVEL -10/+4 – Input level matching from the stereo source can be switched
from +4dBu (high level) to -10dBV (low level). Use PFL to check for correct level setting.
AUXILIARY SENDS – The Left and Right stereo input signals are summed to provide
aux feeds in mono.
Aux sends 1 & 2 can be switched either pre or post-fade using the GLOBAL PRE/POST
SELECT SWITCH. This affects aux sends 1 & 2 for all channels. Normally, effects sends
are post-fade, so that the effect follows the fader level and cue feeds are Pre-Fade so
that an independent mix can be sent to the musicians.
BAL – balances the stereo channel signal within the stereo image to MIX B and L-R
when selected. If the source is mono then the BAL operates as a pan control. The centre
position is detented for quick resetting.
MIX B – routes the channel signal to the Mix B stereo buss.
L-R – routes the channel signal to the main stereo mix.
MUTE – This turns the channel signal on or off. This mute can be controlled by the
automation system. This does not affect the Pre-Fade aux sends.
PFL – Press PFL (Pre-Fade Listen) to listen to the channel Pre-Fade signal in stereo on
headphones or control room speakers. The signal level is shown on the L and R
bargraph meters.
PEAK – The peak detect circuit samples the left and right signal in the channel signal
path. The red LED illuminates when the signal is within 5dB of clipping. Should this occur
check the -10/+4 switch is set correctly.
Channel fader – 60mm smooth action fader controls the overall stereo channel level. All
post-fade aux send levels are dependent on the level of the fader.
LOWER STEREO INPUT CHANNEL ST.1 / 2
GAIN – Use this control to adjust the channel input sensitivity to match the connected
signal source (-20 to +10dBu) to the console operating level (0dBu). Press PFL to check
the signal without affecting the main mix.
EQUALISER – Shelving HF and LF and two fixed frequency peak/dip mid controls MF1
& MF2 provide 15dB of boost or cut. Use the mids to add warmth or presence to the
sound.
- 15 + 15
0 LF
60Hz
- 15
0
+ 15
HF
0
+ 15
250Hz
MF2
- 15
- 15 + 15
0 MF1
2.5kHz
12kHz
- 10 + 20
0
10 0
0 10
0 10
0 10
STATUS
PEAK
10 0
0 10
PRE/POST
PRE/POST
MIX
MIX
PEAK
HF/LF EQ MF1/MF2 EQ