QSC CMX Serie Manual Del Usuario página 13

Connections
Inputs
Each channel has active balanced XLR, ¼" (6.3 mm), and Barrier Strip inputs wired in parallel
20k ohms, for unbalanced it is 10k ohms
Balanced connections are recommended to reduce AC hum and interference, especially with long cable runs. Unbalanced connections may be suit-
able for short cables. The signal's source impedance should be less than 600 ohms.
Balanced Inputs
Use the XLR or ¼" (6.3 mm) TRS input jacks, or the barrier strip.
Unbalanced Inputs:
Connect the unused side (Pin 3) of the balanced input to ground (Pin 1), as shown in
For STEREO operation, use the inputs for both Channel 1 and Channel 2. For PARALLEL INPUTS or BRIDGE MONO operation, use the
Channel 1 input.
See the section on operating modes for more information. To patch the audio signal to other amplifiers (PARALLEL INPUTS and BRIDGE MONO
modes only), see the instructions for using PARALLEL INPUTS on page 8 through page 11.
Any one of these
three connections
— Figure 24 —
Balanced
ground
inverting input
non‑inverting input
— Figure 26 —
(Figure
(Figure 24)
(Figure 25).
XLR unbalanced Jumper pin 1 to
pin 3
12
24). The input impedance for balanced is
— Figure 25 —
Unbalance
ground
non‑inverting input
— Figure 27 —
Pin 1 = Ground
Pin 2 = +
Pin 3 = —