JBL Professional
®
Intellivox ADC Installation Manual
14
201402/ADCIM
WIRING DETAILS
When the Intellivox ADC has been mounted in the
correct position, it may be connected up. Connection is
straightforward; having passed the cable through the
gland, connect the speaker feed to the ‘100 V’ and ‘0’
terminals of the ceramic connection block.
Always ensure that the amplifier is powered
down before wiring the loudspeaker. If the
audio suddenly becomes live there is a
strong risk of electric shock.
The third terminal, marked with an Earth (Ground) symbol,
allows a separate earthing connection to be made to the
loudspeaker. This provides a low impedance circuit to earth
from the metalwork of the enclosure, as often required by
safety regulations. If the loudspeaker enclosure is mounted
on a support that offers a low impedance connection to the
safety ground, the earth terminal of the ceramic connection
block can be directly wired to the mounting support as
indicated in fig.8.1. If a safety ground connection is
not available in the vicinity of the mounting location,
the wiring scheme as indicated in fig.8.2 can be used.
Note that the application dependent safety regulations
should be consulted in order to determine the proper
grounding scheme.
TAP SETTING
The internal 100 V/70 V transformer’s primary tapping
should be set according to the power requirements of the
installation. This figure will have been determined at the
time of site analysis; see also the Maximum SPL figures in
the specifications table on the data sheet.
The tapping is set by means of an internal switch that is
located behind the inspection plate as indicated in fig.9.2
(Model V90) and fig.9.3 (Model H90). This switch has three
positions, labelled 100 W, 50 W and 25 W. These figures
relate to the speaker use on a 100 V line system, lower
powers are available from a 70 V line system.
The table below summarises the output powers:
Tap Switch
setting
Max. output power (W)
100 V line system
70 V line system
100 W
100
50
50 W
50
25
25 W
25
12.5
100 V
0
100 V-/70 V-line feed
(2-core cable)
To safety earth
100 V-/70 V-line feed
(3-core cable)
Brown
Blue
Green/yellow
100 V
0
Brown
Blue
Green/yellow
fig.8.2 - Wiring details B
fig.8.1 - Wiring details A
fig.9.1 - Tap settings
fig.9.2 - Switch locations (Model V90)
fig.9.3 - Switch locations (Model H90)
