Connections; Inputs: Connecting To The Input Terminal Block Inputs - QSC CX168 User Manual

CONNECTIONS:

Each channel has an active balanced "Euro-style" terminal block
input jack. These terminal blocks allow the input wiring to be
terminated using simple hand tools and allows for quick
reconfiguration when needed. The input impedance is 20k ohm
balanced or 10k ohm unbalanced.
Balanced connection is recommended for all audio inputs.
Balanced signals are less prone to AC hum and other electrical
noise. Unbalanced signals can be suitable for short cable runs.
The signal source's output impedance should be less than 600
ohms to avoid high frequency loss in long cables.
If the DataPort is being used for the input signal source,
the terminal block connections should not be used for
inputs. However, they may be used for daisy chaining the
DataPort input signal to other channels or amplifiers. The signal
available from the terminal block input connections will be about
10 dB lower than the signal presented to the DataPort.
Terminal Block Connectors:
Balanced inputs: Connect the
conductors to the connector as
shown.
Unbalanced inputs: Connect the
conductors to the connector as
shown. Make sure that the unused
side of the balanced input is
connected to ground, as shown.
12
INPUTS- Using the Terminal Block Inputs
TERMINAL BLOCK
CONNECTORS
Terminal block: balanced connections
shield
Terminal block: unbalanced connections
shield
jumper