QSC Audio DSP-30 - Manual (Page 7)

7
Installation:
Balanced Audio Connections
Connecting Audio Inputs and Outputs
All audio connections should be balanced to ensure the best performance. Unbalanced signals may be used if necessary; follow
the wiring guidelines below for recommended unbalanced termination.
The audio input jacks are female 3-pin XLR /TRS “combo” connectors. They will accept male XLR plugs or TRS (tip-ring-sleeve)
1/4-inch phone plugs. The audio output jacks are male 3-pin XLR connectors.
Balanced connection is recommended for all inputs.
The XLR - TRS “combo” inputs are electronically balanced.
Balanced input cables are recommended to minimize noise
pick up and prevent ground loops.
Refer to the pinouts provided (below) for proper connection.
BALANCED
XLR
TRS (1/4 inch)
TRS- tip, ring, sleeve (3
conductors)
Suitable only for inputs.