Audio Developments AD146 - Manual (Page 15)

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All input and output impedances are to be found in the TECHNICAL
SPECIFICATION.
All inputs to, and outputs from AD146 are to be found on the connector panel.
Module connector (1) accepts balanced microphones - mic/line
balanced line 1 - mono line
balanced left - stereo line
Module connector (2) accepts balanced line - mic/line
balanced line 2 - mono line
balanced right - stereo line
XLR Pin 1 Shield
Pin 2 Signal +
Pin 3 Signal -
In the case of an unbalanced line-input, pins 1 & 3 should be connected.
If a post-fader, balanced channel output (clean feed) has been included, the signal
appears on a jack in the centre of XLR (2).
Main outputs (3)
 (6) are transformer-balanced and are at line-level. When driving
unbalanced loads, the mixer outputs may be unbalanced by connecting pins 1 & 3.
This will not lead to a loss of output level.
XLR Pin 1 Shield
Pin 2 Signal +
Pin 3 Signal -
The two electronically-balanced stereo-returns enter the mixer on pairs of standard,
‘A’ type stereo jacks - left & right (7) and (8).
BALANCED JACK STEREO UNBALANCED JACK
Tip Signal + Tip Left Signal
Ring Signal - Ring Right Signal
Sleeve Shield Sleeve Shield
The monitor 2 (headphones) output appears on an ‘A’ type stereo jack (9) and is
capable of driving 25R at 0dB.
A three-position rocker switch BATT/EXT (12) selects either internal batteries or an
external DC power source. Power to the mixer is confirmed by the MIX ON LED on
the output module.
The LED flashes when the supply voltage falls below the safe
operating level of 10V.