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850iR
Classroom Audio System
User Manual
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850iR User Manual
850iR User Manual | i
850iR User Manual
CONGRATULATIONS!
Congratulations on your purchase of the 850iR Classroom Audio
System! This simple, yet powerful technology provides crystal-clear sound
throughout the classroom, allowing every child to hear every word
every time.
As the teacher speaks into the REDMIKE™ classroom microphone, his
or her voice is transmitted to the 850iR and then amplied through the
loudspeaker(s). The standard system includes the 850iR infrared receiver/
amplier, REDMIKE classroom microphone, SR-70F infrared sensor and
speaker package.
The 850iR is a two-channel receiver amplier that allows the use of up to
two microphones simultaneously and up to three additional audio input
sources (such as TV, VCR, DVD, CD, MP3, etc.). In addition, Lightspeed
offers various speaker options that are included with your system to
provide optimal sound in rooms of all shapes and sizes.
The REDMIKE is a wireless, pendant-style transmitter. This
two-channel, rechargeable unit is clipped to a lavaliere cord and worn
around the neck for teacher use, or it can be used like a standard handheld
microphone for the students to pass around when speaking.
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850iR User Manual
1. Read Instructions—All safety and
operation instructions should be read
before this Lightspeed product is
operated.
2. Retain Instructions—The safety and
operating instructions should be kept
for future reference.
3. Heed Warnings—All warnings on
this Lightspeed product and in these
instructions should be followed.
4. Follow Instructions—All operating
and other instructions should
be followed.
5. Water and Moisture—This
Lightspeed product should not be
used near water.
6. Heat—This Lightspeed product should
be situated away from heat sources
such as radiators, etc.
7. Power Sources—This Lightspeed
product should be connected
to a power supply only of the
type described in the operation
instructions or as marked on this
Lightspeed product.
8. Power Cord Protection—Power
supply cords should be routed so that
they are not likely to be walked upon
or pinched by items placed upon or
against them.
9. Object and Liquid Entry—Care should
be taken so that objects do not fall
onto and liquids are not spilled into
the Lightspeed product.
10. Damage Requiring Service—This
Lightspeed product should be serviced
only by qualied service personnel.
The user should not attempt to service
this Lightspeed product.
11. Prevent Electric Shock—Do not use
this polarized plug with an extension
cord, receptacle or other outlet unless
the blades can be fully inserted to
prevent blade exposure.
SAFETY INSTRUCTIONS AND CERTIFICATIONS
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
RISK OF ELECTRIC SHOCK DO NOT OPEN
The lightning ash with arrowhead symbol
within an equilateral triangle is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure, that may be sufcient magnitude to
constitute a risk of electric shock.
The exclamation point within an equilateral
triangle is intended to alert the user to
the presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
CAUTION
CERTIFICATIONS
Complies with 72/23/EEC Low Voltage Directive
and 89/336/EEC Electromagnetic Compatibility
Directive. Compliance was demonstrated to the
following specications as listed in the Ofcial
Journal of the European Union:
EN 60950: Electrical Safety – A1:1993,
A2:1993, A3:1993, A4:1997
EN 55022: RF Emissions, Information
Technology Equipment
EN 55024: EMC Immunity Standard
EN 61000-3-2: Harmonics
EN 61000-3-3: Voltage Fluctuation
Lightspeed Technologies launched a formal
product recycle program in Europe that
complies with the European Union Directive
2002/96/EC on Waste Electrical and Electronic
Equipment (“WEEE Directive”). Please visit our
website at www.Lightspeed-tek.com for more
information.
This product is manufactured using lead-free
processes and is free of other materials
harmful to the environment. It conforms to the
most stringent new European guidelines for
consumer products (RoHS).
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850iR User Manual
TABLE OF CONTENTS
850iR CLASSROOM AUDIO SYSTEM
Safety Instructions and Certications ........................................................................ii
SECTION 1: System Overview ................................................................................. 1
System Components ............................................................................................. 2
Front Panel Controls ............................................................................................... 3
Rear Panel Controls ............................................................................................... 4
Page First: Emergency Page Priority .................................................................................... 4
REDMIKE Controls and Connections ...................................................................... 6
Cradle Charger Controls and Connections ............................................................. 7
Optional LT-71 Controls and Connections .............................................................. 8
Optional HM-70 Controls and Connections ............................................................ 9
SECTION 2: Installation ..........................................................................................10
Unpacking Your System .................................................................................................... 11
Location of the Receiver/Amplier..................................................................................12
IR Sensor Installation ............................................................................................13
Suspended Ceiling Mount .................................................................................................. 14
Wall/Solid Ceiling Mount ....................................................................................................14
Speaker Installation ........................................................................................................... 15
Audio Integration ...............................................................................................................16
Finalizing Connections ...................................................................................................... 18
Final Check .......................................................................................................................... 19
SECTION 3: Initial Set-up, Charging and Optional Features ................................20
Initial Set-Up: REDMIKE ........................................................................................21
Initial Set-Up: Optional LT-71 ................................................................................22
Initial Set-Up: Optional HM-70 ..............................................................................23
Charging the REDMIKE .........................................................................................24
Charging the Optional LT-71 .................................................................................25
Charging the Optional HM-70 ...............................................................................26
Output to Personal FM Transmitter .......................................................................27
Using the REDMIKE to Amplify External Audio Equipment ....................................28
SECTION 4: Troubleshooting, Daily Use and Warranty.........................................29
Troubleshooting Guide ..........................................................................................30
Daily Use Instructions ...........................................................................................31
Tips on Classroom Audio ......................................................................................32
Warranty Statement .............................................................................................32
System Specications ..........................................................................................33
Individual Components and Optional Accessories ................................................34
User Notes ............................................................................................................35
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SECTION 1
System Overview
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SYSTEM COMPONENTS
Keep ALL packaging materials. If the system must be returned, using the
original packing material will be quick, convenient and prevent damage.
850iR Infrared Receiver/Amplier and Power Supply
REDMIKE Classroom
Microphone
SR-70F Infrared
Sensor
Sensor Cable
Optional LT-71 LightMic
and Charger Cable
Optional HM-70
Handheld Microphone
and Charger Cable
Speakers and
Speaker Wire
Charging Cradle and Power Supply
LT - 71
Helpful Hint
LES 850iR Classroom Amplification System
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FRONT PANEL CONTROLS
LES 850iR Classroom Amplification System
1. POWER Switch/POWER Indicator:
This switch is used to turn the
850iR ON (switch up), or OFF
(switch down). When the POWER
switch is in the ON position, the
POWER light will glow red.
2. IR Indicators (IR): These lights will
glow red when the corresponding
microphone is turned on. This light
conrms the 850iR is receiving
a steady infrared signal.
3. AF Indicators (AF): These lights
ash green when audio (voice)
from the microphone is detected.
4. A VOLUME: Controls the volume
level of the teacher microphone
that is switched to Channel A.
Rotating the knob clockwise
increases output level.
5. B VOLUME: Controls the volume
level of the optional second
microphone that is switched to
Channel B. Rotating the knob
clockwise increases output level.
2
1
3
4
5
6. AUDIO INPUT VOLUME:
• COMPUTER: Controls the volume
of audio coming from a computer
connected to the rear panel
COMPUTER INPUT jack.
• TV/VCR: Controls the volume of
the source connected to the rear
panel TV/VCR INPUT.
• CD/DVD: Controls the volume
of the source player
connected to the rear panel
CD/DVD INPUT.
6
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SPEAKER OUTPUTS
250 400
OFF
OFF
OFF
OFF
ON
ON ON
ON
VOL.
ADJ.
ALD OUT
AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
ADJ
DC POWER CHARGERS
24VDC
L L R R
1 2 3
4
REAR PANEL CONTROLS
1. SPEAKER OUTPUTS (1-4): These
binding post connectors are used to
connect the 850iR to the loudspeakers.
Depending on the speaker package, all
the outputs may not be used.
2. SPEAKER ON/OFF: These individual
speaker switches can be used to turn
off the audio in a specic area of the
classroom where there may be a
learning group or quiet time.
3. DC POWER: Plug the 24 V power
supply into this jack.
4. CHARGERS: These jacks can be used
to charge the optional LightMic or
handheld mic as an alternative to
connecting them to the REDMIKE
cradle charger.
5. ALD/AUX AUDIO OUT: These output
jacks send audio signal to external
equipment such as a recorder or an
assistive listening device like the
LES-370 Personal FM System.
6. ADJ: These controls adjust the output
evel of the audio being sent out of
the receiver/amplier via the
ALD/AUX AUDIO OUT jacks.
PageFirst: Emergency Page Priority
This optional feature interfaces with an independent classroom paging
system. When the page is broadcast, the system is muted, ensuring important
and emergency school-wide messages are never missed.
How it works:
1. PageFirst sensor clip is hung around the lead wires attached to the in-room
paging speaker.
2. The clip is hard-wired to the 850iR.
3. As a page is broadcast, the sensor clip detects the audio signal though
induction and immediately mutes the 850iR.
4. When the page is over, the audio to the 850iR returns to normal.
(For full installation instructions refer to the install sheet included with the
optional PageFirst sensor.)
2
3
4
5
1
6
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7. AUDIO INPUTS:
• COMPUTER: Accepts stereo signal
from computer via 3.5 mm cable.
• TV/VCR: Accepts stereo signal
from TV/VCR via RCA cable.
• CD/DVD: Accepts stereo signal
from CD/DVD player via RCA cable.
8. 800iX INPUT: This input jack allows
for interface with the Lightspeed
800iX wireless microphone system,
which adds up to additional two
microphone channels.
9. PAGING INPUT and ADJ:
When the optional PageFirst sensor
is connected to this input, the audio
being amplied through the
850iR will mute as an announcement
is made through the school PA
system, ensuring important
messages are never missed.
10. 8-BAND GRAPHIC EQUALIZER: The
sliding controls adjust the levels of
the various audio frequencies. This
allows the installer to properly
equalize the system to produce
optimum sound quality.
11. SENSOR INPUT: The IR sensor cable
connects to either of these two
inputs. Connect additional sensors
to the 850iR to cover large or
odd-shaped classrooms.
12. SENSOR SHORT: This LED glows red
when there is a short in the sensor
or cable.
250 400
700
1K 1K4
2K5
4K
6K
+10
0
-10
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
ADJ
L L R R
SENSOR INPUTS
SENSOR
SHORT
8
9
10
11
12
REAR PANEL CONTROLS (cont’d)
7
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1. POWER BUTTON: Press this button
to turn the REDMIKE ON, press
again to turn it OFF (mute).
2. POWER/LOW BATTERY INDICATOR:
A BLUE light indicates the REDMIKE
is on and fully charged. A RED light
indicates a charge is needed.
3. BATTERY COMPARTMENT: To
access the battery compartment,
slide the door downward.
The battery should only be
replaced by a Lightspeed AA
rechargeable sensing battery
(part # BA-NH2A27).
4. AUDIO/MICROPHONE INPUT: Use this
input to plug in a laptop, MP3 player
or other audio source to wirelessly
transmit audio to be played through
the system. Alternatively, an external
microphone can be connected.
5. CHANNEL SELECT SWITCH (CH A/B):
This switch allows for selection between
Channel A or B. If you are using a single
microphone, we recommend using
Channel A.
6. CHARGER CONTACTS (+ -): These
contacts interface with the charging
tabs in the BC-RMCC cradle charger
for daily charging. Simply place the
REDMIKE in the charger.
REDMIKE CONTROLS AND CONNECTIONS
1
2
3
4
5
6
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1. CHARGE INDICATORS: The light
glows RED while the REDMIKE is
charging. When fully charged, the
light will glow GREEN.
2. DC POWER PORT: Connect the DC
power cord here.
3. OPTIONAL CHARGING PORT: Plug the
charging cord for the optional LT-71 or
the HM-70 microphones here.
CRADLE CHARGER CONTROLS AND CONNECTIONS
1
2
3
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1. ON/OFF/MUTE Switch: This switch
turns LT-71 ON or OFF (mute).
2. Channel Select Switch (CH A/B):
This switch allows for selection
of Channel A or B. If you are
using a single microphone, we
recommend using Channel A.
3. Power/Charge Indicator: The
light glows BLUE when the LT-71
is powered ON, RED when being
charged.
4. External Microphone Input (MIC):
Use the 3.5mm MIC jack for the
optional TK-250 headset microphone
(part# MC-TK250LTM).
5. Auxiliary (AUX): Plug a laptop, MP3
player or other audio source into
this jack to wirelessly transmit the
audio signal to be played through
the system.
6. Charger Input (CHARGER): Plug
the charging cable from the
charger into this jack for daily
charging. The LED on the front will
glow RED to indicate charging.
OPTIONAL LT-71 CONTROLS AND CONNECTIONS
LT- 71
LT- 71
1
2
4
5
6
3
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OPTIONAL HM-70 CONTROLS AND CONNECTIONS
1
5
3
4
1. ON/OFF/MUTE Switch: This switch
turns the unit ON, OFF or MUTE.
2. Channel Select Switch (CH A/B):
Located in the battery compartment,
the switch is set to Channel B at
the factory.
3. Power/Charge Indicator: The
light glows RED when the HM-70
is powered ON, GREEN when
charging.
4. Charger Input (CHARGER): Plug
the charging cable from the charger
into this jack for daily charging.
5. Infrared Emitters: Avoid covering
the emitters as you grip the HM-70
as this could interrupt signal
transmission from the microphone.
6. Volume Gain Adjustment:
Optimum volume level is
pre-set at the factory and no
adjustment should be necessary.
6
2
NiMH
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SECTION 2
Installation
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Ensure that you have received all of the components of your system.
1. UNPACKING YOUR SYSTEM
850iR Infrared Receiver/Amplier and Power Supply
REDMIKE™Classroom
Microphone
SR-70F Infrared Sensor and cable
Speakers and Speaker Wire
Systems are congured with one of four
speaker types shown to the right.
CNXQ (x 1)
DRQ (x 4)
WMQ (x 4)
NXQ (x 1)
Charging Cradle and Power Supply
LES 850iR Classroom Amplification System
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2. LOCATION OF THE RECEIVER/AMPLIFIER
• Before running wires to the 850iR
or plugging in, nd a suitable,
stable location for the amplier.
Ideally, the teacher should have
ready access and an electrical
outlet should be within
six feet. The best
possible location
for the 850iR is in a
media cabinet with
any existing audio/
video equipment.
• A good location would be on any
stable bookcase or shelf within
6 feet of an electrical outlet. The
optional Lightspeed wall shelf (part
#AC-800WB) is specically designed
to support the 850iR.
• Wires should be routed back directly to the
amplier, so select a location that is free from
obstructions that may make routing wire
difcult.
(Example: placing the 850iR near
a whiteboard or bulletin board
would require the wiring
to be run an extra
distance in
order to reach
the amplier.)
Best
Good
Avoid!
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3. IR SENSOR INSTALLATION
Sensor location is very important for optimum performance of the 850iR Classroom
Audio System.
• BEST: On the ceiling at or near the middle of the classroom.
• GOOD: High and centered on the long wall.
• AVOID: Locations in corners, on walls at heights lower than 7 feet, or in places
where the line of sight is or could be obstructed.
Before adjusting the graphic equalizer refer to the intial set-up on page 22.
Sometimes ne-tuning is required to eliminate feedback.
Fine-tuning the Graphic Equalizer:
1. Slide up and ip down the EQ cover door.
2. Walk the room listening for feedback (squealing).
3. Lower the 2K5 and/or 4K sliders if a high-pitched ring is present.
4. Lower the 400 and/or 700 sliders if a low-pitched ring is present.
5. Reduce volume if feedback is still present.
Helpful Hint
Good placement
Best placement
Avoid!
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1. Lift the ceiling tile nearest the grid
rail in your desired sensor location.
Guide one side of the C-clip over
one edge of the grid rail. Providing
rm support to the back of the
grid rail with one hand (to prevent
bending), rmly and carefully snap
the second side of the C-clip over
the edge of the rail.
2. Uncoil sensor wire. Connect one
end of the sensor cable to the
plug on the sensor. Secure wire
overhead and route it back to
the system.
3. Connect the other end of the
sensor cable into one of the sensor
inputs on the back of the system.
IR SENSOR INSTALLATION (cont’d)
1. Screw the plastic mounting strip to
a place high on the wall or in the
middle of the solid ceiling. Mount the
strip horizontally as shown above.
2. Firmly snap the C-clip on the back
of the IR sensor onto the plastic
mounting strip with the sensor plug
hanging down (if a wall mount)
or toward the receiver location (if
ceiling mount).
3. Uncoil the sensor wire. Screw one
end of the sensor cable to the plug
on the sensor. Route the wire back to
the system, securing it along
the way.
4. Connect the other end of the sensor
cable to one of the sensor inputs on
the back of the system.
wall
mounting
strip
c-clip
sensor plug
Suspended Ceiling Mount
Wall/Solid Ceiling Mount
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4. SPEAKER INSTALLATION
1. Locate the speaker installation instructions packed with your
speaker(s).
2. Follow instructions and mount speaker(s).
3. Return to this manual to complete the set up of your system.
CNXQ (x 1)
DRQ (x 4)
WMQ (x 4)
NXQ (x 1)
CNXQ (x 1)
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The 850iR is designed to integrate with multiple audio sources
allowing other instructional technologies to be clearly heard
throughout the classroom.
5. AUDIO INTEGRATION
Projector
DVD/VCR
Speaker(s)
IR Sensor
Te acher’s
Microphone
Projector
Audio In
Audio Out
IR Tr ansmission
Video In
Audio Out
Audio Out
Video Out
Video Out
VGA Out
850iR
850iR BLOCK DIAGRAM
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SPEAKER OUTPUTS
250 400
700
1K 1K4
2K5
4K
6K
+10
0
-10
OFF
OFF
OFF
OFF
ON
ON ON
ON
VOL.
ADJ.
ALD OUT
AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
ADJ
DC POWER CHARGERS
24VDC
L L R R
SENSOR INPUTS
SENSOR
SHORT
1 2 3
4
Below are instructions on how to connect an external audio device
like a TV/VCR, CD/DVD or computer directly into the 850iR.
AUDIO INTEGRATION (cont’d)
1
2
1. Turn the audio input volume controls on the front panel all the
way down.
2. Connect a patch cable (not included)
from the audio source into the
corresponding input jack on the rear
panel of the 850iR.
3. With both the 850iR and audio source power on, adjust
the corresponding volume control until the desired level is
achieved. NOTE! Be careful to not to set the volume too high,
as this can distort the speaker and potentially cause damage.
3
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2. Ensure speaker wire connections are secure and not frayed. Under normal
conditions, each speaker volume control should remain in the center position.
1. Ensure the power switch is in the “OFF” position and all front panel volume controls
are turned fully counter-clockwise.
6. FINALIZING CONNECTIONS
SPEAKER OUTPUTS
250 400
700
1K 1K4
2K5
4K
6K
+10
0
-10
OFF
OFF
OFF
OFF
ON
ON ON
ON
VOL.
ADJ.
ALD OUT
AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
ADJ
DC POWER CHARGERS
24VDC
L L R R
SENSOR INPUTS
SENSOR
SHORT
1 2 3
4
1
2
Use conduit to
protect wires.
• Conduit is the
best means to
keep the wires/
cables out of
sight and safe
from wear.
(Conduit is not
included.)
Helpful Hint
LES 850iR Classroom Amplification System
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1. Ensure all cables are appropriately routed out of walking paths and work areas to
prevent safety hazards to individuals in the room.
2. The amplier packing material should be kept for warranty shipping purposes.
3. Proceed to initial set-up to test system performance.
Leave microphones charging so they are ready for use.
Microphones will need to be charged on a daily basis.
FINAL CHECK
FINALIZING CONNECTIONS (cont’d)
5. Connect DC end of
power supply to the
black power jack
labeled “DC POWER.”
3. Ensure any auxiliary audio sources are connected to corresponding labeled input.
4. Ensure
sensor cable
is attached
securely.
SPEAKER OUTPUTS
250 400
700
1K 1K4
2K5
4K
6K
+10
0
-10
OFF
OFF
OFF
OFF
ON
ON ON
ON
VOL.
ADJ.
ALD OUT
AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
ADJ
DC POWER CHARGERS
24VDC
L L R R
SENSOR INPUTS
SENSOR
SHORT
1 2 3
4
250 400
700
1K 1K4
2K5
4K
6K
+10
0
-10
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
ADJ
L L R R
SENSOR INPUTS
SENSOR
SHORT
6. Connect the AC
power cable from
the power supply
to a wall outlet.
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SECTION 3
Initial Set-up, Charging and
Optional Features
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3. Slip the REDMIKE with lanyard around the neck
and position the top of the microphone just below
the collarbone. NOTE: Positioning of the REDMIKE is
critical for proper volume adjustment.
4. While speaking in a normal voice
slowly increase the volume of the
corresponding channel on the 850iR
until your voice is barely audible.
REMEMBER: This equipment
supplements the user’s voice so they are able to speak in a conversational tone.
Having the volume set too high will result in feedback and listener fatigue.
INITIAL SET-UP: REDMIKE
250 400
700
1K 1K 4
2K5
4K
6K
+10
0
-10
SENSOR INPUTS
SENSOR
SHORT
5. Once initial volume level is set, walk
around the room and listen for audio
dropout and overall audio quality.
Fine-tuning the audio is accomplished by
making minor adjustments to the 8-Band
Graphic Equalizer on the back panel of
the 850iR.
6. If a second REDMIKE was
purchased, repeat steps 2-4.
NOTE: Each REDMIKE has its
channel pre-set to either A or
B. No further adjustment is
necessary.
See page 13 for hints on setting the EQ.
LES 850iR Classroom Amplification System
1. Turn the 850iR power switch to the
ON position. The RED LED on the
switch will glow.
2. Turn on the REDMIKE. The RED IR LED on the
850iR will light to indicate a signal is being
received.
LES 850iR Classroom Amplification System
LES 850iR Classroom Amplification System
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4. While speaking in a normal voice, increase the B VOLUME level until
your voice is barely audible. REMEMBER: This equipment is designed to
supplement and distribute the user’s voice so they are able to speak in a
conversational tone. Having the volume set too high will result in feedback
and listener fatigue.
1. Turn the 850iR power switch to the
ON position. The RED LED on the
switch will glow.
2. Turn on the LT-71 and set the operating
channel to “B”.
A CH B
OFF
ON
INITIAL SET-UP: OPTIONAL LT-71
3. Slip the LT-71 with lanyard around
the neck and position the top of the
microphone just below the collarbone.
NOTE: Positioning of the LT-71 is critical
for proper volume adjustment.
LES 850iR Classroom Amplification System
LES 850iR Classroom Amplification System
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2. Turn on the HM-70 by sliding the switch to
the top position.
INITIAL SET-UP: OPTIONAL HM-70
3. Grip the barrel in the center section.
Avoid covering the infrared emitters
circling the base. This could interrupt
signal transmission.
1. Ensure the 850iR is ON. The RED
LED on the power switch will glow.
4. While speaking in a normal voice, increase the B VOLUME level until
your voice is barely audible. REMEMBER: This equipment is designed to
supplement and distribute the user’s voice so they are able to speak in a
conversational tone. Having the volume set too high will result in feedback
and listener fatigue.
LES 850iR Classroom Amplification System
LES 850iR Classroom Amplification System
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CHARGING THE REDMIKE
1. Plug power cord
into the cradle
charger and
then plug the
AC end into an
electrical outlet.
• REDMIKE incorporates alkaline protection into the microphone design.
Replacement AA NiMH batteries may only be purchased through
Lightspeed Technologies (part # BA-NH2A27).
• A blinking LED indicates a charging error. Be sure to use a Lightspeed
rechargeable sensing battery.
2. Ensure that the REDMIKE
is turned OFF.
3. Place the REDMIKE into the cradle. The LED on
the cradle will glow RED indicating charging has
started. When the REDMIKE is fully charged
the LED on the cradle charger will change to
GREEN.
Helpful Hint
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• Microphones can be left in the charger for up to two weeks without
degradation to battery life.
• A full charge will be attained in 8-10 hours.
• Fully charged Lightspeed microphones will last over 7 hours.
1. Ensure that the LT-71 is turned OFF.
2. Make sure the cradle charger is plugged into a wall outlet. Connect one end of
the charging cable into the jack labeled CHARGER on the side of the LT-71 and
plug the other end into the charging jack on the rear of the REDMIKE cradle
charger. The LT-71’s rechargeable batteries are factory installed. The LED on the
front of the LT-71 will glow RED when charging.
3. Leave the LT-71 plugged in overnight (8–10 hrs.) to obtain a full charge.
CHARGING THE OPTIONAL LT-71
Helpful Hint
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Do not attempt to charge alkaline batteries. They can overheat
and expand, creating a signicant hazard and damaging the
LT-71 and HM-70. (This is not covered by the warranty.)
1. Ensure that the HM-70 is turned OFF.
2. Make sure the cradle charger is plugged into a wall outlet. Connect one end of
the charging cable into the jack labeled CHARGER on the side of the HM-70 and
plug the other end into the charging jack on the rear of the cradle charger. The
HM-70’s rechargeable batteries are factory installed. The LED on the front of the
Handheld Mic will glow GREEN when charging.
3. Leave the HM-70 plugged in overnight (8–10 hrs.) to obtain a full charge. The
GREEN light will turn off when fully charged.
CHARGING THE OPTIONAL HM-70
Helpful Hint
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OUTPUT TO PERSONAL FM TRANSMITTER
250 400
700
1K 1K4
2K5
4K
6K
+10
0
-10
OFF
OFF
ON
VOL.
ADJ.
ALD OUT
AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PA GING INPUT
ADJ
DC POWER CHARGERS
24VDC
L L R R
SENSOR INPUTS
SENSOR
SHORT
4
SPEAKER OUTPUTS
250 400
700
1K 1K4
2K5
4K
6K
+10
0
-10
OFF
OFF
OFF
OFF
ON
ON ON
ON
VOL.
ADJ.
ALD OUT
AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PA GING INPUT
ADJ
DC POWER CHARGERS
24VDC
L L R R
SENSOR INPUTS
SENSOR
SHORT
1 2 3
4
2. Determine the size and type of audio input
jack on the device as many manufacturers’
products differ in connector size and
shape. The Lightspeed LES-370 Personal
FM System requires a 3.5 mm to 3.5 mm
patch cable (part# CA-MMC3535, not included).
5. With the 850iR and ALD turned on, speak into the
REDMIKE and slowly adjust the corresponding “ADJ”
volume control until the appropriate audio level is
attained in the ALD’s receiver headphones.
1. Turn the ALD (Assistive Listening Device) volume control on the back panel all
the way down (fully counterclockwise).
3. Connect a patch cable from the ALD’s microphone
jack or AUX input to the 3.5 mm audio jack labeled
“ALD OUT” on the back of the 850iR.
4. Adjust the volume control on the ALD’s receiver
to maximum output. NOTE! This is to set the
maximum allowable signal from the 850iR.
250 400
700
1K 1K4
2K5
4K
6K
+10
0
-10
OFF
ON
VOL.
ADJ.
ALD OUT
AUX OUT
VOL.
ADJ.
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
ADJ
DC POWER CHARGERS
24VDC
L L R R
SENSOR INPUTS
SENSOR
SHORT
4
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USING THE REDMIKE TO AMPLIFY EXTERNAL AUDIO EQUIPMENT
The REDMIKE includes a 3.5mm audio input jack to connect to an audio source like
a laptop or MP3 player. The REDMIKE will transmit the audio signal to be played
through the system.
LT-71
The optional LT-71 can also amplify external
audio. Simply plug the 3.5mm patch cable
from the audio source into the input labeled
“AUX IN” and adjust the volume of the
source to the desired sound level.
Helpful Hint
1. If your system includes two
REDMIKEs, use the student
microphone (already set to
Channel B). NOTE: This feature
works on both channels but we recommend using Channel B so the teacher’s
volume on the CH A does not have to be adjusted. REMEMBER: It’s easy to
determine which REDMIKE is set to Channel B by speaking into the mic and
watching which set of LED’s glow on the front panel of the 850iR.
2. Plug your laptop, MP3
player or other audio
source into the input on
the REDMIKE labeled
“INPUT” using a 3.5mm
patch cable.
AUDIO
OUTPUT
AUDIO
INPUT
3. Adjust the volume of the selected
mic channel to achieve desired
loudness.
LES 850iR Classroom Amplification System
LES 850iR Classroom Amplification System
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SECTION 4
Troubleshooting, Daily Use
and Warranty
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TROUBLESHOOTING GUIDE
If you review these instructions and still have questions, write down the serial
number and model number of your system and call Lightspeed Technical Services at
800.732.8999, 5 a.m. – 5 p.m., PST.
Note: Most problems are directly related to low battery power. Please run through the “Battery
Check” items rst. For remaining troubleshooting, use known good, fully-charged batteries.
Battery Check
• Conrm batteries are charged
each night.
• Conrm proper batteries are used.
The REDMIKE requires the Lightspeed
BA-NH2A27 rechargeable sensing
battery for proper charging. The LT-71
& HM-70 require NiMH AA rechargeable
batteries.
• Make sure the microphones are turned
off while charging so a full charge is
attained. Full charge will last eight
hours.
• Inspect the battery contacts. Clean and
adjust if necessary.
Hearing Static
• Ensure sensor is in optimum location
(refer to sensor placement in manual).
A single sensor will cover a 1600 sq. ft.
enclosed classroom.
• Ensure that no other REDMIKE/LT71/
HM70 is operating on the same channel.
Low Volume or Feedback
• Ensure microphone is positioned
appropriately, just below the collar
bone.
• Check volume level on the amplier. If
the volume is too high, feedback will
occur. Adjust accordingly.
No Sound From Speaker
• Turn the 850iR on. Conrm that the
POWER light located on the front panel
switch is on.
• Conrm signal is being received at the
850iR. The IR signal light will be RED
indicating a signal is being received.
• Conrm that REDMIKE is turned on.
There will be a BLUE LED on
the microphone to indicate it is
powered on.
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LES 850iR Classroom Amplification System
1. TURN ON THE 850iR
Ensure the power is switched on.
4. CHARGE BATTERIES
Turn the
microphone ON
using the ON/
OFF switch on
the side of the
REDMIKE and
speak normally.
DAILY USE INSTRUCTIONS
2. POSITION THE REDMIKE
3. TURN ON THE REDMIKE
Remove the REDMIKE from the
charging cradle and place it
around your neck. Adjust the
neck strap so the top of the
microphone rests just below
your collarbone.
Place the REDMIKE back into the
charging cradle to recharge at the
end of the day.
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1
TIPS ON CLASSROOM AUDIO
Avoid wearing jewelry that may rub or bump against
the microphone.
Turn the REDMIKE off during private conversations with a student,
parent, or other classroom visitor. You can also cover the LED
lens on top of the REDMIKE to block the signal.
Recharge batteries each night. When recharged nightly, operating
time (actual usage) for the transmitters will last through a typical
school day.
Five-year Limited Warranty
Lightspeed Classroom Audio Systems are guaranteed against malfunction due to defects
in materials and workmanship for a period of FIVE (5) YEARS, beginning at the date of
the purchase invoice. If such malfunction occurs, the product will be repaired or replaced
(at Lightspeed’s option) without charge during the warranty period.
1. Warranty on infrared microphones is FIVE (5) YEARS.
2. Warranty on Lightspeed rechargeable batteries, all external cables and wires provided
by Lightspeed is one (1) year.
3. Prepaid shipping labels are provided by Lightspeed factory or an authorized warranty
service center for warranty repairs.
4. Warranty does not extend to nish, appearance items, or malfunctions due to abuse
or operation other than specied conditions, nor does it extend to incidental or
consequential damages. Repair by other than Lightspeed or its authorized service
agencies will void this guarantee. Information on authorized service agencies is
available from Lightspeed Technologies, Inc.
2
3
4
Speak in a natural voice. A normal conversational speech level
will provide an adequate signal. It is not necessary to increase
the intensity of your voice—the audio system provides
adequate amplication (approximately 5 – 10 dB) above
ambient room noises.
Our Service Department (800.732.8999, 5 a.m. – 5 p.m., PST)
will handle all your repair/replacement needs.
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SYSTEM SPECIFICATIONS
OVERALL SPECIFICATIONS
RECEIVER SPECIFICATIONS
TRANSMITTER SPECIFICATIONS
IR SENSOR SPECIFICATIONS
Power Output ....................................................... 12 W per channel (48 W total)
Amplier Frequency Response ............................. 40 Hz to 20 kHz ±3 dB
Carrier Frequencies (IR) ....................................... 2.06/2.54; 3.2/3.7 MHz
Signal-to-Noise Ratio ............................................ > 73 dB
Dynamic Range .................................................... > 73 dB
Maximum Deviation ............................................. ±50 dB
Receiver Type ....................................................... Superheterodyne
Receiver Sensitivity ..............................................6 µV for 60 dB S/N
Image and Spurious Rejection .............................. > 70 dB
Dimensions (W x D x H) ....................................... 17.3” x 8.5” x 1.75”
Weight ..................................................................7 lbs.
Working Range ..................................................... Up to 1600 square feet per sensor
Cable .................................................................... 50 ft., Plenum-rated
Mounting .............................................................. Ceiling clip/Wall bracket
Dimensions .......................................................... 4.25” (Diam.) x 2.0” (H)
Weight ..................................................................4.5 oz.
LT-71 LightMic
Audio Distortion ................................................... < 1 %
Built-in Microphone .............................................. Unidirectional Electret
Battery Power (1-year warranty) .......................... 2 AA NiMH Rechargeable
Audio Inputs ......................................................... Mic Level 3.5 mm
Line Level 3.5 mm
Dimensions (W x D x H) ....................................... 1.375” x .75” x 4.625”
Weight ..................................................................3.7 oz.
REDMIKE
Audio Distortion ................................................... < 1 %
Built-in Microphone .............................................. Unidirectional Electret
Battery Power (1-year warranty) .......................... 1 AA NiMH Rechargeable
Sensing Battery
Audio Input ..........................................................3.5 mm
Dimensions (W x D x H) ....................................... 0.9” x 1.0” x 3.5”
Weight ..................................................................2.1 oz.
HM-70 Handheld Microphone
Audio Distortion ................................................... < 1 %
Built-in Microphone .............................................. Unidirectional Electret
Battery Power (1-year warranty) .......................... 2 AA NiMH Rechargeable
Dimensions (W x D x H) ....................................... 2.25” x 2.25” x 8.75”
Weight ..................................................................7.36 oz.
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Part Number
Description
INDIVIDUAL COMPONENTS & OPTIONAL ACCESSORIES
Optional Accessories
RX-850
RMT
LT71
HM70
BA-NH2A27
AC-TCC7
AC-LTCB
IR-SR70F
CA-PC50F
MC-TK250LTM
CA-RCA6
CA-RCA24
CA-MSC3535
CA-MMC2535
Infrared receiver/amplier/mixer
REDMIKE classroom microphone
w/lavaliere cord and rechargeable AA battery
LightMic microphone with lavaliere cord, rechargeable
batteries and charging cable
Handheld microphone with rechargeable batteries and
charging cable
Lightspeed AA rechargeable sensing battery
(for REDMIKE)
Charging cable for LT-71 and HM-70 microphones
Lavaliere cord for REDMIKE, LT-71
Infrared sensor with cable and wall or ceiling mounting
bracket
Plenum sensor cable (50 ft.)
Noise-canceling headset microphone
6’ dual RCA audio cable
24’ dual RCA audio cable
3.5mm to 3.5mm stereo audio cable
Audio patch cable (2.5 mm mono to 3.5 mm mono)
BC-RMCC
PS-5V-1.0
REDMIKE cradle charger
Cradle charger power supply
AC-800WB
Wall shelf
PS-24V-2.5
Power supply/battery charger for 850iR
SPEAKERS
Contact Lightspeed at 800.732.8999 for speaker
information
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USER NOTES
Record your system serial numbers and
purchase information. This is helpful
when ordering additional components,
accessories, and/or warranty service.
Components
850iR
Serial Number
Microphones
Speakers
Purchase Information
Your School/Organization
District
Purchase Date
Invoice
Sensors
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USER NOTES
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USER NOTES
Page 42
AC-MN850
Lightspeed Technologies, Inc.
11509 SW Herman Rd
Tualatin, OR 97062
800.732.8999
www.lightspeed-tek.com
MK-MN0030608-1
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