Aurora Audio GTM822-2GN - Manual (Page 16)

When connecting unbalanced equipment to the GTM822's audio inputs,
connect the wiring as follows :-
XLR inputs :- Connect the signal's hot to pin 2, and the shield to pin 3.
Leave pin 1 disconnected.
TRS inputs :- Connect the signal's hot to tip, and the shield to ring.
Leave the sleeve disconnected.
When connecting unbalanced equipment to the GTM822's audio outputs,
connect the wiring as follows :-
XLR outputs :- Connect the signal's hot to pin 2, and the
shield to pin 1. Leave pin 3 disconnected.
TRS outputs :-
Monitor and stereo O/P :- Connect the signal's hot to tip, and the
shield to ring. Leave the sleeve disconnected.
All other outputs :- Connect the signal's hot to tip, and the
shield to sleeve. Leave the ring disconnected
Following these guidelines should minimize grounding issues but, for best
results, always use balanced devices and wiring.
Addendum #4 :- Specifications
Channels
Gain :- -20dB to +10dB on the input sensitivity switch plus
another 10dB in the fader providing a total range of
+/- 20dB. Front panel trimpot to set channel unity
gain.
Input Impedance :- >15 Kohms balanced
Output Impedance :- < 75 ohms balanced
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