LightSpeed Technologies LES 600 User Manual
LES 600 Series
Listening Enhancement System
for Sound-Field Classroom Amplification
tm
User Manual
LightSPEED Technologies, Inc.
Table of Contents
Several studies validated by the U.S.
Department of Education and the
Educational Audiology Association verify that
poor classroom acoustics, high ambient noise,
and temporary mild hearing loss among children
place many students academically at risk.
The Sound-Field FM Classroom Amplification
provided by the LES 600 increases both the
volume and clarity of your voice, and evenly
distributes it so that no matter where students
are seated, they have equal opportunity to
understand what is being said, regardless of
seating arrangement.
The following pages provide: Pages
Operating Instructions 4
Microphone Placement 7
Connecting to Other Audio Equipment 10
Tips on Using Classroom Amplification 12
Reference Guide to Controls 14
Trouble Shooting 18
Transmitter and Battery Care 20
Now we hope you will enjoy using what many principals,
teachers and students are calling, “One of the most
effective teaching aids introduced in the decade.”
4 LES 600 OPERATING INSTRUCTIONS
Operating Instructions
Step1
Power for Your LES 600 Receiver/Amplifier
1 Check that:
• Both front panel microphone volume controls (MIC 1
VOLUME and MIC 2 VOLUME) are set to minimum
(turned fully counter-clockwise).
• The Receiver/Amplifier is connected to a power source: Use
the enclosed AC/DC power adapter to plug into a power
cord or a standard wall electrical outlet, and connect the
other end to the DC POWER IN jack on the back panel.
• The speakers are connected as instructed in the Installation
Guide included in your packing box.
2 Turn ON the MIC 1 VOLUME power/volume knob located
on the left side of the front panel of the Receiver/Amplifier.
The red POWER light on the top left
Note Refer to the
Reference Guide on page
14 to identify the name and
location of each component
of your system.
Familiarizing yourself with
these pages may be helpful
if you are unfamiliar with
electronic equipment.
should light up. (If your system has
the optional additional wireless module installed, you may turn the Mic 2
Volume power/volume knob on as
well. This knob is located on the right
side of the front panel and has its own
POWER light on the top right that
will light up.)
LES 600 OPERATING INSTRUCTIONS 5
Step2
Power for Your Belt-Pack Transmitter & Microphone
1 Ensure the Belt-pack Transmitter is turned OFF.
2 Your Belt-pack Transmitter has its
internal rechargeable batteries
already installed. Connect one end
of the Charging Cable to one of the
TRANSMITTER CHARGING jacks
on the back panel of the Receiver/
Amplifier. Connect the other end
of the Charging Cable to the
INPUT charging jack on the side of
the BP-60 Belt-pack Transmitter as
shown in the illustration.
Note The internal
rechargeable batteries are
not completely charged
when shipped. They must
be fully charged for 8 or
more hours before regular
classroom operation.
3 The battery charging indicator LED (labeled CHARGING)
lights green when the Transmitter is connected with a
charging cable to the TRANSMITTER CHARGING jack on
the back panel of the Receiver/Amplifier. When charging is
complete (8-12 hours), the CHARGING indicator light will
turn off.
6 LES 600 OPERATING INSTRUCTIONS
4 NiMH batteries will usually maintain their charge for a full
day of normal classroom use. Always switch the Transmitter
OFF when not in use (lunch hour, quiet times, etc.).
Should the batteries in the Transmitter need to be changed,
open the lower plastic cover by pressing the ribbed
portions on both sides of the cover (located near the center
of the Transmitter) towards each other. At the same time,
pull forward on the cover, rotating it on the hinges located
at the bottom of the cover. Insert the new batteries (paying
attention to the + and - as indicated inside the case).
Rotate the cover back toward the Transmitter center and
snap it back into a locked position.
5 To attach the Microphone to the Transmitter, align the
microphone plug over the belt-pack connector jack. With
the black plastic dot facing forward, gently guide the connector into the jack. Be sure not to put undue stress on the
wire or connector. To remove the Microphone, simply press
inwards on the black plastic dot located on the microphone
connector. Holding the connector rather than pulling on the
wire, gently remove the connector from the Transmitter jack.
6 A switch on the top of the Transmitter case activates the
Transmitter. When turned ON, the red POWER indicator
will flash briefly.If the indicator remains lit continuously,
the battery charge is getting too low and must be recharged.
Note There is a delay
of about one-second from
the time the Transmitter
switch is turned ON until
the Receiver sends a signal
to the Amplifier. This is
normal.
When the Transmitter power is turned
OFF, the microphone audio to the
Receiver is automatically muted.
LES 600 OPERATING INSTRUCTIONS 7
Step 3
Positioning Your Microphone
After the microphone is connected to the belt-pack Transmitter,
position the microphone as described below:
1 Lavaliere Microphone: The lavaliere microphone should be
hung around the neck as illustrated, resting on your collar
bone. The neck cord is adjusted by squeezing the two long
ends together and then sliding the adjuster up or down the cord.
2 Flexible Collar Microphone: The flexible collar microphone
is wrapped around the neck with the microphone element
positioned 3-4 inches from the mouth, as shown.
3 Noise-canceling Headset Microphone: The headset micro
phone is placed from behind the head over both ears. (Like
putting a pair of glasses on backwards). The microphone
arm is then adjusted up or down to follow along your jaw
line with the microphone element at the end positioned
about 3/4” from the chin as shown. The flat side (with
screwhead) should be facing away from your mouth.
Step 4
Adjusting Microphone Volume
1 Make sure the Receiver/ Amplifier is switched ON and the
Microphone is securely connected to the Transmitter.
2 Switch the Transmitter to the ON
position. The red POWER indicator
on the Transmitter will flash briefly.
The yellow RF INDICATOR on the
front panel of the Receiver/
Amplifier should light, indicating
that it is receiving the Transmitter
signal and is ready for use.
Note Feedback or
"squealing" may occur if
the volume is set too high.
Reducing the loudness of
the speakers with the
volume control usually
eliminates feedback.
8 LES 600 OPERATING INSTRUCTIONS
3 When speaking at a normal voice level, the green AF INDI-
CATOR on the Receiver/Amplifier front panel should flash
on and off as the voice level goes up and down. While
speaking at a conversational voice level, slowly turn the
MIC 1 VOLUME control knob clockwise to increase the
loudness of the speakers until the sound level is adequate for
the room.
Step 5
Power for Your *Optional* Hand-held Microphone
The Hand-held Microphone comes with a Battery Charger and
three (3) NiMH rechargeable batteries.
1 Confirm that the Receiver/
Note The rechargeable
batteries are not fully
charged prior to delivery. In
order to prolong battery
life, batteries should be
charged for at least 8 hours
before first using.
Amplifier is connected to a
standard electrical wall outlet or
power strip.
2 To charge the Hand-held
Microphone/Transmitter, connect
the Microphone/ Transmitter to the
Receiver/ Amplifier as shown using
a Charging Cable. The green CHARGING light on the front
of the Receiver/Amplifier will come on.
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