Yamaha aventage RX-A3070 Owner's Manual page 42

XLR jacks
Transmit analog audio signals. Use an XLR balanced cable.
Match the pins and insert the "male" connector of the XLR
balanced cable until you hear a click.
XLR balanced cable(male)
IO 4
A U D
R
X
When disconnecting the cable from the unit, hold down the PUSH button
on the unit and then pull the connector out.
About the XLR jacks
The pin assignments for the XLR jacks of the unit are shown
below. Before connecting an XLR balanced cable, refer to the
instruction manual of your device and verify that its XLR
jacks are compatible with the pin assignments.
2. HOT 1. GND
3. COLD
42
En