JBL Ivx HP-DS170 Installation Manual - page 11
11
AUDIO INPUTS
The Intellivox is normally fitted with two transformer-
balanced line inputs and one input for connection to a
100 V-line system. Selection of Input 1 and/or Input 2 as
audio source is made from the WinControl software via
the network, and for most installations only Input 1 may
be required. However, Input 2 may be connected to a
secondary signal path (in case of a failure elsewhere in the
system), or to an emergency sound source.
The 100 V input uses amplifier Input 1. Do NOT
simultaneously connect a line level input to the
Input 1 connector and a 70/100 V-line signal to
the 100 V input connector.
For optimum results only use good quality balanced audio
cable consisting of a twisted pair and an overall screen.
The audio source(s) (e.g., the Octadrive) should have a
low impedance balanced output. The nominal line input
level is 0 dBV.
The line level analogue audio inputs use 3-pin
3.81 mm-pitch screw terminal connectors. Mating
connectors are supplied with the unit. The inputs should
be wired as follows:
+
-
Screen
Cold (-)
Black (UK) or
White (US)
Hot (+)
Red (UK) or
Blue (US)
If the Intellivox is being fed from equipment whose outputs
are on 3-pin XLR connectors, follow the wiring procedure
below:
XLR PIN INPUT CONN PIN FUNCTION
1
2
Screen
2
1
Signal + (‘hot’)
3
3
Signal – (‘cold’)
+
-
Screen
Cold (-)
Black (UK) or White (US)
Hot (+)
Red (UK) or Blue (US)
Balanced source output (e.g., XLR)
1 = Screen, 2 = Hot (+), 3 = Cold (-)
If the source equipment has a well-designed balanced
output and the wiring strategy shown above is used, there
should be no problems with hum or other extraneous
noise. Note that pin 1 of the XLR and pin 2 of the terminal
connector are analogue audio grounds and should be used
only for connecting the screen of the audio cables, and for
no other purpose. See Fig.8.
The 100 V input uses a 2-pin 5.08 mm-pitch screw terminal
connector. A mating connector is supplied with the unit.
The input should be wired according to the diagram shown
below:
+
-
Fig.7 Analogue input (US wiring).
Fig.8 Balanced wiring (US).
Fig.9 100 V-line wiring.
201601/IvxHPDS_v1.2
JBL
®
Intellivox HP series Installation Manual Rev 1.2