Audio Input And Output; Balanced Input Connections; Unbalanced Input Connections; Speakon Output Connections - Zenith 10K4 User Manual

7.4 Audio input and output

7.4.1 Balanced input connections

Audio inputs – four channel models
The XLR input connectors are electronically
balanced, and wired according to the IEC 268
standard (pin 2 = hot). XLR input connectors should
be wired as follows:
Pin 1 Ground/Shield
Pin 2 Hot (+)
Pin 3 Cold (-)
- When linking the same source
signal to several input channels,
be aware that there is a limit to
the number of channels an
output source can drive,
A typical output source (e.g. a
DSP crossover unit) can drive
up to four amplifier channels
before external line-drivers
might be required to buffer the signal.

7.4.2 Unbalanced input connections

To connect an input to an unbalanced source, it is
possible to connect pins 1 and 3 in the XLR plug at
the amplifier end of the cable. However, a better
method is to connect pin 3 to the shield at the
source end of the cable, as this usually results in
better hum and noise rejection. Balanced input
connections are recommended whenever possible.

7.4.3 SpeakON output connections

Amplifier is equipped with the Speakon output
connectors.
SpeakON inputs – four channel models
Zenith 10K4 Amplifier Manual 17