AMX AXB-VOL3 - Manual (Page 8)

Installation
4 AXB-VOL3 Three-Channel Volume Control
AXlink connector
Install the AXlink data/power bus wiring as shown in FIG. 2.
Volume channels 1 - 3 connectors
Volume channels 1 - 3 can be wired for unbalanced or balanced line operation, as shown in FIG. 3.
FIG. 2 AXlink data/power connections
FIG. 3 Volume Channels 1 - 3 Connector wiring diagrams
PWR
AXP
AXM
GND
PWR
AXP
AXM
GND
AXB-VOL3
Control
system
GND
IN-
IN+
GND
OUT-
OUT+
Unbalanced IN
Jumper IN- to GND
Unbalanced OUT
GND
IN-
IN+
GND
OUT-
OUT+
Balanced
IN
Balanced
OUT
Optional 600 ohm resistor can be added for impedance matching, if required