adt-audio
ToolMod® Pro-Audio Module System
TM222 Stereo Mastering Compressor
9
verse the order of equalizer and compressor without actually repatching the cables.
The only requirement to use this feature is to place the compressor post equalizer. Ar-
range eq and compressor in a way that the outputs of the equalizer are connected to
the inputs of the compressor.
The inputs of the equalizers TM204, TM205, and TM208 are connected to the TRS jacks
OUT-b in parallel. If the equalizer INPUTS are connected to the side chain insert inputs
of the compressor, the regulation takes place controlled by the input signal of the equa-
lizer as soon as the side-chain-insert switch is pressed. In this case the setting of the
eq does not affect the regulation of the compressor which results in exactly the same
effect that you get if you place the eq post the compressor. The only little downside is
that the autogain circuit cannot compensate the level offset that is caused by the set-
ting of equalizer. This offset, that is determined by the difference between the input
and the output level of the eq can be easily compensated with the manual gain pot.
The two additional cables are short TRS to TRS cables.
1. connect TRS OUT-b, EQ compartment, left channel with
TRS IN-b, Compressor compartment, left channel
2. connect TRS OUT-b, EQ compartment, right channel with
TRS IN-b, Compressor compartment, right channel
With these connections, the switch SIDE-CHAIN-INSERT selects the order of equalizer
and compressor:
SIDE-CHAIN-INSERT not pressed - EQ -> Compressor
SIDE-CHAIN-INSERT pressed - Compressor -> EQ
Some notes:
It is not necessary that eq and compressor are installed next to each other or in the
same frame. If the audio cabling connects the eq outputs with the compressor inputs,
this feature works.
Feedback Regulation
The TM222 is a feed forward controlled VCA Compressor. It is possible to operate the
compressor with feedback regulation instead, which changes the characteristic of the
regulation. To switch over to feedback operation it is necessary to connect the outputs
of the compressor to the side chain insert inputs. With these connections, the side chain
insert switch selects feedback regulation instead of feed forward regulation.
Cabling for Feedback Regulation
Since the outputs of the compressor are wired to xlr male connectors only, two spe-
cial split cables are necessary. You can order these cables from us or make it yourself.
You need two short Y cables with an xlr male on one end and an xlr female and a trs
plug on the other two ends.
The following connections are necessary:
1. Output left (OUTa) to side chain insert in left (INb)
2. Output right (Outb) to side chain insert in right (INb)
The compressor outputs are available on the xlr female plugs of the Y cables.
