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Input from External
Audio Equipment
Below are instructions on how to connect
an external audio device like a TV/VCR,
CD/DVD, cassette player, or projector.
1. Connect an RCA cable from the
audio source to one of the four (4)
AUDIO INPUT jacks on the back of
the LES 780iR using an RCA-type male
connector. If the audio source produces
a stereo signal, a stereo to mono adapter
is required (Part # AC-STM-ADPT).
2. With the LES 780iR on, adjust the cor-
responding volume knob on the front
to a desired level.
Output to Personal
FM Transmitter
1. Using a cable with a 3.5 mm connector
at one end, connect the FM OUT or
AUX OUT 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 manufacturers’ products differ.
The LightSPEED LES-370 requires the
CA-MMC3535 cable.
2. With the LES 780iR turned on, adjust
the FM OUT or AUX OUT volume
on the back of the LES 780iR to a
desired level.
Speaker Control
The LES 780iR has six individual speaker
outputs, each with its own on/off switch
and volume control. By “zoning” or sepa-
rating the classroom into different
areas where audio may or may not be de-
sired, the teacher has greater flexibility
controlling the dispersion of sound
throughout the room. Zoning is especially
useful in large or odd-shaped classrooms.
While LightSPEED recommends leaving the
speaker volume set in the middle position
to maintain a uniform sound, there may be
times when separate volume adjustments are
necessary.
Turning Speakers On and Off
1. Ensure that the LES 780iR is turned off
and that A and B VOLUME
are turned down.
2. Turn the corresponding SPEAKERS
(1-6)/OFF switch(es) on the front
panel to the on (up) position.
3. Turn the LES 780iR on and slowly turn
up the level of A VOLUME. Walk
around the classroom speaking into the
mic at a normal level and ensure that the
desired volume is coming from each
speaker. Do the same with B VOLUME
if using a second LightMic.
Controlling the Volume of
the Individual Speakers
An area of the classroom may contain a
noise emitter such as an HVAC system. In
this case, it may be necessary to turn up the
volume of the affected speaker to overcome
the noise in that area.
When his situation arises, the LES 780iR
allows the user to fine tune the output level:
1. Locate the speaker volume control knobs
on back panel (SPEAKER 1-6) above
the speaker outputs.
2. If possible, have a second person stand
by the speaker(s) needing adjustment.
3. Speak into the mic at a normal level
and adjust the corresponding speaker
volume control(s) (SPEAKER 1-6) to a
desired level.
Turning speaker volume too high can result in
feedback when walking under speaker.
6. LightMic Microphone/
Transmitter
For testing purposes, basic instructions
for wearing and operating the LightMic
are provided below. For more detailed
instructions, refer to page 11.
• Clip the LightMic to the lavaliere.
• Place the LightMic and lavaliere cord
around your neck and adjust cord
length so the top of the LightMic sits
just below your collar bone.
• Slide the ON/OFF switch on the
LightMic to ON. The red power
indicator will light.
• Slide the channel select switch to “A.”
7. Testing
Test the system to ensure everything is
correctly connected and working proper-
ly before your first full day of use. A
second person is helpful to listen and
ensure your voice is clear but not loud.
• With the LightMic positioned
properly around the neck, speak
normally and turn the A VOLUME
clockwise until an optimum voice
level is achieved. You may not be able
to hear your own voice when this is
properly set. However, your
students will.
[ note: ]
The system can generate feedback (a squealing
or howling sound) if there is too much volume
or the equalization (EQ) levels are incor-
rectly set. Adjust the three EQ level knobs if
necessary to eliminate feedback and to obtain
a natural sound.
• With volume and EQ levels set, walk
around the room, paying special
attention to the areas farthest from
the IR sensor. Your voice should
remain clear and intelligible.
• Consult the troubleshooting guide
for further assistance.
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