Allen&Heath GS1 USER GUIDE - Manual (Page 16)

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Matching the input level to the GS1 will result in the best audio performance.
If no Input is connected to the line socket then the Mic/line switch acts as a 30dB
pad on the Mic input.
To optimise the signal quality ensure the input level is as close to the console
meters’ ‘O’ operating level as possible.
The GS1 headroom.
The GS1 signal to noise ratio.
Use PFL to measure level on the master LR meters.
Aim for a 0dB to +3dB meter reading on average.
Check the multitrack recorder and the master 2 track recorder for specified
operating levels. Select either Hi (+4dBu ) or Lo (-10dBV) using the Hi/Lo switch
under the main LR meters.
L EVEL M ATCHING
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5
GS1
N OTES
3
GAIN
LINE/XLR
MIC
5
PFL
1
PAD
0 10
+6 +6
+3 +3
0 0
-3 -3
-6 -6
-10 -10
-15 -15
-20 -20
L R
Hi
Lo PFL
ACTIVE
LEVEL
MAX HEADROOM
NOISE FLOOR
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4
2
CONSOLE 'O' OPERATING LEVEL
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S ECTION 5 G ETTING T HE B EST F ROM T HE GS1