1
2
RED
BLACK
POWER
IR
AF
A VOLUME
B VOLUME
AUX 1 VOLUME
AUX 2 VOLUME
LES - 750IR
IR
AF
[16]
Check that the LES 750iR is connected to a power
source. Connect the power supply into a standard
AC outlet, and then plug the other end to the DC
POWER jack on the back panel.
SPEAKER OUTPUT
DC POWER
CHARGE
MIXED AUDIO
OUT
OUT
ADJ
ADJ
AUX
AUX
IN 1
IN 2
OFF
ON
OFF
ON
OFF
ON
OFF
ON
1
2
3
4
EQUALIZER
SENSOR
SHORT
SENSOR INPUTS
250
400
600
1K
1K6
2K5
6K3
4K
+10
0
-10
Output to Personal FM Transmitter
1. Make sure to turn the ADJ volume
controls on the back panel all the way
down (fully counterclockwise).
2. Using a cable with a 3.5mm connector
on one end, connect one of the MIXED
AUDIO OUT jacks to the input jack of
an FM transmitter, recorder, or other
device. It is important to determine the
size and type of audio input jack on the
device as many manufacturer’s products
differ. The LightSPEED LES-370
Personal FM System requires the
CA-MMC3535 cable.
3. With the LES 750iR turned on, turn
the corresponding ADJ volume control
to a desired level. When used with a
personal FM transmitter, typically this
volume control should be left at a
low level.
Audio Equalizer
The LES 750iR has a built-in 8-band
equalizer. This equalizer consists of eight
sliding controls that adjust the levels of
various high and low frequency sounds.
Because all loudspeakers and class-
rooms have different acoustical
properties, it can be difficult to
produce optimum sound
quality in every room. However,
this equalizer allows the installer to
fine tune the system, creating high
quality sound in every classroom
with any loudspeaker.
• The 8-band Equalizer is shipped from
the factory at preset levels based on
the speaker type. Refer to your speaker
install guide for more information on
these standard settings.
SPEAKER OUTPUT
DC POWER
CHARGE
MIXED AUDIO
OUT
OUT
ADJ
ADJ
AUX
AUX
IN 1
IN 2
OFF
ON
OFF
ON
OFF
ON
OFF
ON
1
2
3
4
EQUALIZER
SENSOR
SHORT
SENSOR INPUTS
250
400
600
1K
1K6
2K5
6K3
4K
+10
0
-10
Turn ON the power switch located
on the left side of the front panel
of the receiver. The red POWER
light on the switch will glow.
To AC outlet
System Operation:
Turn the volume controls
(A VOLUME and B VOLUME) on
the front panel are turned all the
way down (fully counter-clockwise).
Make sure the speakers are securely
connected to their binding posts (as
described in the speaker installation
instructions) and the speaker switches
are set to the ON position.
Step 1:
Powering the LES 750iR
POWER
IR
AF
A VOLUME
B VOLUME
AUX 1 VOLUME
AUX 2 VOLUME
LES - 750IR
IR
AF
[7]
b
c
d
SPEAKER OUTPUT
DC POWER
CHARGE
MIXED AUDIO
OUT
OUT
ADJ
ADJ
AUX
AUX
IN 1
IN 2
OFF
ON
OFF
ON
OFF
ON
OFF
ON
1
2
3
4
EQUALIZER
SENSOR
SHORT
SENSOR INPUTS
250
400
600
1K
1K6
2K5
6K3
4K
+10
0
-10
a
