LA Audio G400 Installation guide

British
Originals
A U D I O
PRODUCT OVERVIEW
The G400 is a professional 4 channel noise gate
that can be operated as 4 separate processors or
linked as two independant stereo pairs. In Link
mode, Channel 1 and 3 provide Master control
and 'rms summing' is used to ensure that signals
from both the linked channels operate the gate.
Each channel has fully variable controls for Filter
Frequency, Threshold and Release. Range is
switchable to provide either full muting (-80dBu)
or a more subtle level of signal attenuation (-
20dBu).
Two Attack modes are available; Fast or Slow and
Release is manually adjustable. In-built sidechain
'auto-level-sensing' and Hold circuitry ensure that
false triggering and chatter are kept to a
minimum. High and Low pass filters are included
and can be used for a wide range of frequency
conscious gating applications. A LISTEN facility
allows the filters to be easily tuned by ear. Each
channel also has a sidechain insert with front
panel indication when an External Key jack is
plugged in.
Led indicators are provided for Above-Below
Threshold, Bypass and Link.
All inputs and outputs are electronically balanced
and can be switched between +4dBu and -10dBV
operating levels.
SPECIFICATIONS
ELECTRICAL
Frequency response:
Input Impedance:
Maximum Input Level:
Input-Output Level:
Output Impedance:
Load Impedance:
Max. Output Level:
THD:
Signal to Noise Ratio:
Threshold:
Range:
20Hz to 20kHz (+0, -0.5dB)
20k balanced
+20dBu
+4dBu or -10dBV switched
75R balanced
> 600R
+20dBu
< 0.05% (1kHz, +4dBu)
> 90dB
+4dBu out, 22Hz- 22kHz
-50dB to +20dB
-80dBu or -20dBu
Attack:
Release:
High Pass Filter:
Low Pass Filter:
Power Requirement:
PHYSICAL
Input Connectors:
Output Connectors:
Power Connection:
Dimensions (mm):


Weight:
Shipping Weight:
Temperature Range:

ARCHITECTS & ENGINEERS SPECIFICATIONS
The G400 shall be a 1U unit providing 4 channels of
Frequency Conscious noise gating. Channels 1&2 and
3&4 can be linked for stereo operation with Channels 1
and 3 providing master control.
Each gate section shall have fully variable Threshold,
Release, Hi-pass and Low-pass sidechain filters. Attack
shall be switched between Fast and Slow modes with
manually adjustable Release.
The sidechain shall include a Listen mode so the Filters
can be tuned by ear.
Above and Below threshold leds shall be provided to give
a visual indication of gate operation. Bypass and Link
switches shall have led indicators.
Inputs and Outputs shall be balanced on XLR connectors
and operating level shall be switchable between +4dBu
and -10dBV. Each channel shall have a Side Chain insert
point on TRS jack.
The Gate shall be constructed in accordance with the
directives encompassed within the 'CE' regulations and
so marked. The Gate shall be the LAAudio G400.
Fast:50uS
Slow:1mS
10mS to 4S variable
22Hz to 3kHz variable
250Hz to 30kHz variable
15VA, 115/230V AC,
50/60Hz
XLR 3 pin (Pin 2 hot)
XLR 3 pin (Pin 2 hot)
IEC 3 pin socket,
Detachable lead
482 (19") W
164 (6.5") D
44 (1.75") H - 1U
2.9 kg, 6lbs
3.6kg, 8lbs
Operating 0ºC to 50ºC
Storage -30ºC to 75ºC
4 Channel Frequency Conscious Noise Gate
G
In keeping with our policy of continuous improvement LAAudio reserves the right to alter specifications without prior notice.
Manufactured in the UK by LAAudio, 1 Stable Court, Herriard Park, Hants RG25 2PL.
Tel: [phone] Fax: [phone] Web: www.laaudio.co.uk. email: [email protected]

190.0
44.0
483.0
442.0
BLOCK DIAGRAM
DIMENSIONS
British
Originals
A U D I O
S/C
INPUT
OUTPUT
RELEASE
THRESHOLDHI-PASS LO-PASS
SIDECHAIN
ATTACK
LISTEN
BYPASS LINK
THRESHOLD
+4dBu/-10dBV
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - - - -
LEDS
SIDECHAIN
FILTER
INSERT
CH2
SLOW FAST
RANGE
-80dB -20dB
OUTPUTOUTPUT
MADE IN THE UK BY LA AUDIO
SERIAL NUMBER
FUSE: 230V T100mA
LEVEL
4
INPUT INPUT INPUT INPUT
SIDE
CHAIN OUTPUT OUTPUT
POWER
3 2 1
Ring = Send
Tip = Return
SIDE
CHAIN
Ring = Send
Tip = Return
SIDE
CHAIN
Ring = Send
Tip = Return
SIDE
CHAIN
Ring = Send
Tip = Return
CH. 3
CH. 4
+4dB
-10dB
LEVEL
CH. 1
CH. 2
+4dB
-10dB
230V 50Hz 15VA
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
THIS UNIT MUST BE EARTHED
TO REDUCE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
AVIS
RISQU DE CHOC ELECTRIQUE. NE PAS OUVRIR
REFER SERVICING TO QUALIFIED PERSONNEL
INTERVENTION SEULMENT PAR PERSONNELQUALIFIE
ON
VCA
MASTER
CHANNEL 1 SLAVE CHANNEL 2 MASTER CHANNEL 3 SLAVE CHANNEL 4
LINK
DUAL
STEREO
HI-PASS
Hz
LO-PASS
kHz
BYPASS
LISTEN ATTACK
RELEASETHRESHOLD
0.01 4
1
SdB
BYPASS
2
-80dB
-10dB
SLOW
FAST
RANGE
EXT.KEY BELOW ABOVE
150
500
3k
22 0.25 30
1.5
0.5 5
0
-50 20
-40
-20
50
LINK
DUAL
STEREO
2
HI-PASS
Hz
LO-PASS
kHz
BYPASS
LISTEN ATTACK
RELEASETHRESHOLD
0.01 4
1
SdB
BYPASS
2
-80dB
-10dB
SLOW
FAST
RANGE
EXT.KEY BELOW ABOVE
150
500
3k
22 0.25 30
1.5
0.5 5
0
-50 20
-40
-20
50 2
HI-PASS
Hz
LO-PASS
kHz
BYPASS
LISTEN ATTACK
RELEASETHRESHOLD
0.01 4
1
SdB
BYPASS
2
-80dB
-10dB
SLOW
FAST
RANGE
EXT.KEY BELOW ABOVE
150
500
3k
22 0.25 30
1.5
0.5 5
0
-50 20
-40
-20
50
LINK
DUAL
STEREO
2
HI-PASS
Hz
LO-PASS
kHz
BYPASS
LISTEN ATTACK
RELEASETHRESHOLD
0.01 4
1
SdB
BYPASSLINKLINK
2
-80dB
-10dB
SLOW
FAST
RANGE
EXT.KEY BELOW ABOVE POWER
150
500
3k
22 0.25 30
1.5
0.5 5
0
-50 20
-40
-20
50 2
A U DI O
QUAD FREQUENCY
CONSCIOUS GATE
4 Channel Frequency Conscious Noise Gate
G
In keeping with our policy of continuous improvement LAAudio reserves the right to alter specifications without prior notice.
Manufactured in the UK by LAAudio, 1 Stable Court, Herriard Park, Hants RG25 2PL.
Tel: [phone] Fax: [phone] Web: www.laaudio.co.uk. email: [email protected]