Audio Connections; Compensation Of Interference With Balanced Connections; Connector For The Headphones, Aux In And Direct In - Behringer HA4400 User Manual

+
Output
Pin 1
Pin 2 = (+) Signal
Pin 3 = (-) Signal
Cable
2 1
Shield
(+) Signal + Hum
(-) Signal + Hum
3
RFI and Hum
Input
Ground
1 2
Positive
3
Negative
(+)Hum + Signal
(-)Hum + Signal
2 x Signal
= Signal + 6 dB