SiX User Guide
Detailed Description
16
G-Series Bus Compressor
The G Series Bus Comp in Six is a stereo compressor applied across the Main
Mix bus, using exactly the same circuit topology as the original design found
on the SL4000 G-Series console released in 1989 (which in-turn was evolved
from the earlier E-Series consoles).
The T/HOLD pot adjusts the Threshold for the compressor, with ve LEDs
indicating the amount of gain reduction applied (-1dB, -3dB, -6dB, -9dB,
-15dB). The compressor has carefully selected attack and release times to suit
a wide variety of mix content and uses the 4:1 ratio setting from the original
processor that is preferred by many SSL large format console users. Adjustable
MAKE UP gain and a bypass ‘IN’ switch allow level matching and switching for
direct comparisons of the clean and processed signals.
The bus compressor side chain also has a 1st order High Pass Filter at approx
50Hz, a feature of more modern SSL bus compressor designs to give smoother performance from mixes with prominant bass
content.
Main Bus Block Diagram
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