LA4
AMPLIFIED CONTROLLER
User Manual
VERSION 1.1
LA4_UM_ML_1.1
w w w . l - a c o u s t i c s . c o m
18 en
6.6
Wiring
6.6.1
XLR input connectors
Two 3 pin male XLR input connectors are provided for channel A & B respectively as well as two 3 pin female XLR
input link connectors wired in parallel on channel A & B (see Figure 9).
XLR Input connectors are active balanced and wired according to IEC 268 as below:
Pin 1
Ö
Ground (Shield)
Pin 2
Ö
Hot (pos. signal)
Pin 3
Ö
Cold (neg. signal)
Figure 9: Input XLR connectors cabling
The input impedance is high enough (22 k
Ω
, balanced) to allow ‘‘daisy-chaining” or multiple parallel input connections.
To daisy chain amplified controllers use the male XLR connector (‘’Link’’) to feed the input signal to the next unit in the
signal chain.
The headroom of the input circuits is high enough to accept the maximum output level from virtually any line level signal
source (up to 22 dBu).
Note:
Symmetrical (balanced) shielded cables are highly recommended as balanced signals are less sensitive to AC hum
and radio interference. Unbalanced lines may result in noise especially over long cable runs.
