System Wiring - Montarbo PALCO PLUS User Manual

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56

5 - SYSTEM WIRING

Due to the low impedance of the speakers and the high power levels
involved, it is necessary to use cables with adequate copper section.
For a simpler approach, we recommend the use of 4-conductor cables wired
®
to plugs (type NL-4 for the RA16 enclosures and NL-8 for the
neutrik speakon
RAB1815 sub-bass units).
Each cable conductor must have the minimum cross section shown in the
following table.
The cables must be of adequate quality, with a flexible insulation, suitable
for the installation's environmental conditions, and with sufficient copper
section to minimize power loss.
Cable length
up to 20 meters
more than 20 meters
Each pair of RA16 enclosures requires an interconnection cable, 0.5 meters
long, equipped with
neutrik speakon
The high power involved necessitates the correct wiring of the system: any
error in wiring or any cable reversal will result in serious damage to the
speakers.
The array speakers are wired as follows:
®
Neutrik Speakon NL- 4 pins RA16
1+
1-
2+
2-
®
Neutrik Speakon NL- 8 pins RAB1815
1+
1-
2+
2-
3 +
3 -
4 +
4 -
To connect the mixer to the LM24 controller, and the controller to the
power amplifiers, always use SHEILDED cables (signal cables, balanced),
of adequate section and quality.
The system's wiring is a function of the selected set-up.
The following pages illustrate the wiring corresponding to the LM24
controller's factory Set Up (pages 57-63) and to the PLM6800 powered
controller's factory Set Up (pages 64-68).
Cable section
2
2.5 mm (AWG 10)
2
4.0 mm (AWG 6)
®
NL-4 plugs, at least 4 x 1.5 mm
LF+ (8 ohm)
LF-
HF+ (16 ohm)
HF -
n.c.
n.c.
n.c
n.c.
18" + (4 ohm)
18" -
15" + (4 ohm)
15" -
2
.