Wiring Instructions; Troubleshooting - JBL Control 25AV-LS User Manual

Control 25AV-LS Loudspeakers feature barrier strip
When wiring Control 25AV-LS
input connectors.
loudspeakers, always use proper electrical wiring
practices in accordance with your local building
codes and regulations.
To wire the Control 25AV-LS, connect the positive lead
(+) from your power amplifier to the positive input on the
Control 25AV-LS and the negative lead (-) from your power
amplifier to the negative input on the Control 25AV-LS as
shown in Fig. 7.
Fig. 7
+ -
Before turning on the amplifier, make sure the speaker
tap switch is set to the proper selection.
70/100V feed to the Control 25AV-LS in its bypass
mode may result in permanent damage to the
loudspeaker.
DISTRIBUTED LINE SYSTEMS
The Control 25AV-LS includes a transformer for use on
70V / 100V distribution lines as shown in Fig. 8. Be sure
to use a line distribution amplifier when using the Control
25AV-LS units with the transformer tap settings.
As with conventional 8 ohm loudpseakers, simply connect
the amplifier's "+"and "-" outputs directly to the red (+) and
black (-) input jacks on the back of the enclosure. Set the
transformer tap (located on the lower left rear side of the
cabinet) to the desired wattage.
Fig. 8
For General Signaling Use Only. For Fire Alarm use refer to Fire Alarm Panel's Installation Manual.

WIRING INSTRUCTIONS

+ -
Sending a
+ -
+
-
70V / 100V line
The advantage of using a 70V / 100V distribution line is the
ability to connect multiple Control 25AV-LS loudspeakers
to one amplifier channel providing that all the speaker taps
do not add up to more than the amplifier channel's power
rating.
A conservative rule-of-thumb is to try to keep the sum of
the speaker loads (watts) under 80% of the power amp
rating. (e.g. A 100 watt amplifier channel will then drive 10
speaker set to 7.5 watts each, i.e. 10 x 7.5 = 75 watts).

TROUBLESHOOTING

If there is no sound from your speakers:
• Make sure your power amplifier is on and the gain is set
above its minimum setting.
• Make sure there is a signal to your amplifier from your
mixer.
• Ensure all wires are connected and that none are cut or
frayed.
• If more than one pair of speakers is being used, check
the minimum impedance requirments of your amplifier
(overloading your amplifier may result in damage to your
amplifier).
If there is no sound from one of your speakers:
• Check the balance control on your mixer.
• Check the channel output gains of your amplifier.
• Ensure all wires are connected and that none are cut or
frayed.
If there is no (or weak) bass output or a poor stereo
image:
• Make sure the polarities (+ and -) of the speakers inputs
are properly connected
+ -
+ -
JBL Professional Control 25AV-LS
+ -
+ -
+ -
3