850iR
Classroom Audio System
U s e r M a n u a l
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8 5 0 i R U s e r M a n u a l
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 amplified through the
loudspeaker(s). The standard system includes the 850iR infrared receiver/
amplifier, REDMIKE classroom microphone, SR-70F infrared sensor and
speaker package.
The 850iR is a two-channel receiver amplifier 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 | i
8 5 0 i R U s e r M a n u a l
SAFETY INSTRUCTIONS AND CERTIFICATIONS
1. Read Instructions—All safety and
CAUTION
operation instructions should be read
before this Lightspeed product is
operated.
RISK OF ELECTRIC SHOCK DO NOT OPEN
2. Retain Instructions—The safety and
operating instructions should be kept
for future reference.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE
3. Heed Warnings—All warnings on
this Lightspeed product and in these
instructions should be followed.
REFER SERVICING TO QUALIFIED PERSONNEL
The lightning flash 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 sufficient magnitude to
constitute a risk of electric shock.
4. Follow Instructions—All operating
and other instructions should
be followed.
5. Water and Moisture—This
Lightspeed product should not be
used near water.
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.
6. Heat—This Lightspeed product should
be situated away from heat sources
such as radiators, etc.
CERTIFICATIONS
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.
Complies with 72/23/EEC Low Voltage Directive
and 89/336/EEC Electromagnetic Compatibility
Directive. Compliance was demonstrated to the
following specifications as listed in the Official
Journal of the European Union:
EN 60950: Electrical Safety – A1:1993,
A2:1993, A3:1993, A4:1997
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.
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
information.
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 qualified service personnel.
The user should not attempt to service
this Lightspeed product.
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).
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.
Lightspeed is proud to inform that the REDCAT
RCP has achieved the ENERGY STAR® label.
ENERGY STAR qualified products save you
money by reducing energy costs and helps
protect the environment without sacrificing
features or performance.
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ii | 850iR User Manual
8 5 0 i R U s e r M a n u a l
TABLE OF CONTENTS
850iR CLASSROOM AUDIO SYSTEM
Safety Instructions and Certifications ........................................................................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
Attaching the Lanyard to REDMIKE........................................................................ 7
Cradle Charger Controls and Connections............................................................. 8
Optional LT-71 Controls and Connections.................................................................. 9
Optional HM-70 Controls and Connections...........................................................10
SECTION 2: Installation..........................................................................................11
Unpacking Your System....................................................................................................12
Location of the Receiver/Amplifier..................................................................................13
IR Sensor Installation............................................................................................14
Suspended Ceiling Mount..................................................................................................15
Wall/Solid Ceiling Mount....................................................................................................15
Speaker Installation...........................................................................................................16
Audio Integration ...............................................................................................................17
Finalizing Connections ......................................................................................................19
Final Check..........................................................................................................................20
SECTION 3: Initial Set-up, Charging and Optional Features................................21
Initial Set-Up: REDMIKE ........................................................................................22
Initial Set-Up: Optional LT-71 ................................................................................23
Initial Set-Up: Optional HM-70..............................................................................24
Charging the REDMIKE .........................................................................................25
Charging the Optional LT-71 .................................................................................26
Charging the Optional HM-70...............................................................................27
Output to Personal FM Transmitter.......................................................................28
Using the REDMIKE to Amplify External Audio Equipment....................................29
SECTION 4: Troubleshooting, Daily Use and Warranty.........................................30
Troubleshooting Guide..........................................................................................31
Daily Use Instructions...........................................................................................32
Tips on Classroom Audio ......................................................................................33
Warranty Statement.............................................................................................33
System Specifications ..........................................................................................34
Individual Components and Optional Accessories................................................35
User Notes............................................................................................................36
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850iR User Manual | iii
8 5 0 i R U s e r M a n u a l
SECTION 1
System Overview
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1 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
SYSTEM COMPONENTS
LES 850iR Classroom Amplification System
850iR Infrared Receiver/Amplifier and Power Supply
Sensor Cable
SR-70F Infrared
Sensor
Charging Cradle and Power Supply
REDMIKE Classroom
Microphone
nal LT-71 LightMic
d Charger Cable
Optional HM-70
Handheld Microphone
and Charger Cable
Helpful Hint
ls. If the system must be returned, using the
l be quick, convenient and prevent damage.
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850iR User Manual | 2
8 5 0 i R U s e r M a n u a l
FRONT PANEL CONTROLS
2
LES 850iR Classroom Amplification System
5
4
1
3
3. AF Indicators (AF): These lights
flash green when audio (voice)
from the microphone is detected.
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.
4. A VOLUME: Controls the volume
level of the teacher microphone
that is switched to Channel A.
Rotating the knob clockwise
increases output level.
2. IR Indicators (IR): These lights will
glow red when the corresponding
microphone is turned on. This light
confirms the 850iR is receiving
a steady infrared signal.
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.
6
6. AUDIO INPUT VOLUME:
• CD/DVD: Controls the volume
of the source player
• COMPUTER: Controls the volume
of audio coming from a computer
connected to the rear panel
COMPUTER INPUT jack.
connected to the rear panel
CD/DVD INPUT.
• TV/VCR: Controls the volume of
the source connected to the rear
panel TV/VCR INPUT.
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3 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
REAR PANEL CONTROLS
6
1
4
5
1
2
3
VOL.
ADJ.
VOL.
COU
ALD OUT AUX OUT
ADJ.
SPEAKER OUTPUTS
DC POWER CHARGERS
OFF
ON
OFF ON
OFF
ON
OFF ON
24V
3
4
2
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.
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.
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.
2. SPEAKER ON/OFF: These individual
speaker switches can be used to turn
off the audio in a specific area of the
classroom where there may be a
learning group or quiet time.
6. ADJ: These controls adjust the output
evel of the audio being sent out of
the receiver/amplifier via the
3. DC POWER: Plug the 24 V power
supply into this jack.
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.)
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850iR User Manual | 4
8 5 0 i R U s e r M a n u a l
REAR PANEL CONTROLS (cont’d)
7
AUDIO INPUTS
6K
250 400 700
2K5
1K 1K4
+10
4K
V
A
COMPUTER
L
11
SENSOR INPUTS
SENSOR
SHORT
R
L
R
TV/VCR
CD/DVD
0
10
12
9
ADJ
800iX
-10
INPUT
PAGING INPUT
8
7. AUDIO INPUTS:
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.
• 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
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.
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.
12. SENSOR SHORT: This LED glows red
when there is a short in the sensor
or cable.
9. PAGING INPUT and ADJ:
When the optional PageFirst sensor
is connected to this input, the audio
being amplified through the
850iR will mute as an announcement
is made through the school PA
system, ensuring important
messages are never missed.
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5 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
REDMIKE CONTROLS AND CONNECTIONS
1
4
5
2
3
6
1. POWER BUTTON: Press this button
to turn the REDMIKE ON, press
again to turn it OFF (mute).
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.
2. POWER/LOW BATTERY INDICATOR:
A BLUE light indicates the REDMIKE
is on and fully charged. A RED light
indicates a charge is needed.
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.
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).
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.
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850iR User Manual | 6
8 5 0 i R U s e r M a n u a l
ATTACHING THE LANYARD TO REDMIKE
1. ATTACH THE FOAM HOLDER
Insert the REDMIKE clip into the slot
at the bottom of the foam holder.
2. POSITION THE REDMIKE
Slip the REDMIKE with lanyard
around the neck. Adjust the neck
strap so the top of the microphone
rests just below your collarbone.
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7 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
CRADLE CHARGER CONTROLS AND CONNECTIONS
1
2
3
1. CHARGE INDICATORS: The light
glows RED while the REDMIKE is
charging. When fully charged, the
light will glow GREEN.
3. OPTIONAL CHARGING PORT: Plug the
charging cord for the optional LT-71 or
the HM-70 microphones here.
2. DC POWER PORT: Connect the DC
power cord here.
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8 5 0 i R U s e r M a n u a l
OPTIONAL LT-71 CONTROLS AND CONNECTIONS
4
1
LT-71
2
LT-71
5
6
3
1. ON/OFF/MUTE Switch: This switch
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.
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.
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.
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).
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9 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
OPTIONAL HM-70 CONTROLS AND CONNECTIONS
3
4
1
NiMH
2
6
5
1. ON/OFF/MUTE Switch: This switch
5. Infrared Emitters: Avoid covering
the emitters as you grip the HM-70
as this could interrupt signal
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.
transmission from the microphone.
6. Volume Gain Adjustment:
Optimum volume level is
pre-set at the factory and no
adjustment should be necessary.
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.
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850iR User Manual | 10
8 5 0 i R U s e r M a n u a l
SECTION 2
Installation
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11 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
1. UNPACKING YOUR SYSTEM
LES 850iR Classroom Amplification System
E
850iR Infrared Receiver/Amplifier and Power Supply
SR-70F Infrared Sensor and cable
REDMIKE™Classroom
Microphone
Charging Cradle and Power Supply
Speakers and Speaker Wire
Systems are configured with one of four
speaker types shown to the right.
NXQ (x 1)
WMQ (x 4)
DRQ (x 4)
CNXQ (x 1)
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850iR User Manual | 12
8 5 0 i R U s e r M a n u a l
2. LOCATION OF THE RECEIVER/AMPLIFIER
• Before running wires to the 850iR
or plugging in, find a suitable,
stable location for the amplifier.
Ideally, the teacher should have
ready access and an electrical
outlet should be within
six feet. The best
• 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 specifically designed
to support the 850iR.
Best
possible location
for the 850iR is in a
Good
media cabinet with
any existing audio/
video equipment.
• Wires should be routed back directly to the
amplifier, so select a location that is free from
obstructions that may make routing wire
difficult.
(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 amplifier.)
Avoid!
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13 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
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.
Best placement
Good placement
Avoid!
Helpful Hint
alizer refer to the intial set-up on page 22.
to eliminate feedback.
er:
cover door.
dback (squealing).
s if a high-pitched ring is present.
ers if a low-pitched ring is present.
still present.
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850iR User Manual | 14
8 5 0 i R U s e r M a n u a l
IR SENSOR INSTALLATION (cont’d)
Suspended Ceiling Mount
Wall/Solid Ceiling Mount
wall
mounting
strip
c-clip
sensor plug
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
firm support to the back of the
grid rail with one hand (to prevent
bending), firmly and carefully snap
the second side of the C-clip over
the edge of the rail.
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.
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.
4. Connect the other end of the sensor
cable to one of the sensor inputs on
the back of the system.
3. Connect the other end of the
sensor cable into one of the sensor
inputs on the back of the system.
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15 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
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.
NXQ (x 1)
WMQ (x 4)
DRQ (x 4)
CNXQ (x 1)
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850iR User Manual | 16
8 5 0 i R U s e r M a n u a l
5. AUDIO INTEGRATION
850iR BLOCK DIAGRAM
Video In
r
Projector
IR Sensor
IR Transmission
Teacher’s
Microphone
Audio Out
VGA Out
Speaker(s)
Video Out
Audio Out
Audio Out
Video Out
Audio In
DVD/VCR
850iR
The 850iR is designed to integrate with multiple audio sources
allowing other instructional technologies to be clearly heard
throughout the classroom.
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17 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
AUDIO INTEGRATION (cont’d)
Below are instructions on how to connect an external audio device
like a TV/VCR, CD/DVD or computer directly into the 850iR.
1
1. Turn the audio input volume controls on the front panel all the
way down.
AUDIO INPUTS
6K
250 400 700 1K 1K4 2K5 4K
+10
VOL.
ADJ.
COMPUTER
T
SENSOR
SHORT
R
L
R
SENSOR INPUTS
TV/VCR
CD/DVD
0
ADJ
iX
-10
INPUT
PAGING INPUT
2
2. Connect a patch cable (not included)
from the audio source into the
corresponding input jack on the rear
panel of the 850iR.
3
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.
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850iR User Manual | 18
8 5 0 i R U s e r M a n u a l
6. FINALIZING CONNECTIONS
1. Ensure the power switch is in the “OFF” position and all front panel volume controls
are turned fully counter-clockwise.
LES 850iR Classroom Amplification System
2. Ensure speaker wire connections are secure andnot frayed. Under normal
conditions, each speaker volume control should remain in the center position.
AUDIO INPUTS
6K
250 400 700 1K 1K4 2K5 4K
+10
VOL.
ADJ.
COMPUTER
L
SENSOR
SHORT
R
L
R
SENSOR INPUTS
TV/VCR
CD/DVD
0
ADJ
800iX
-10
INPUT
PAGING INPUT
Helpful Hint
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8 5 0 i R U s e r M a n u a l
FINALIZING CONNECTIONS (cont’d)
3. Ensure any auxiliary audio sources are connected to corresponding labeled input.
AUDIO INPUTS
.
.
COMPUTER
L
R
L
R
TV/VCR
CD/DVD
ADJ
800iX
INPUT
PAGING INPUT
4. Ensure
sensor cable
is attached
securely.
4
1
2
3
AUDIO INPUTS
6K
250 400 700 1K 1K4 2K5 4K
+10
VOL.
ADJ.
VOL.
ADJ.
COMPUTER
L
ALD OUT AUX OUT
SENSOR
SHORT
R
L
R
SENSOR INPUTS
TV/VCR
CD/DVD
0
SPEAKER OUTPUTS
DC POWER CHARGERS
ADJ
800iX
-10
INPUT
OFF
ON
OFF ON
OFF
ON
OFF O
PAGING INPUT
24VDC
5. Connect DC end of
power supply to the
black power jack
6. Connect the AC
power cable from
the power supply
to a wall outlet.
labeled “DC POWER.”
FINAL CHECK
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 amplifier 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.
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850iR User Manual | 20
8 5 0 i R U s e r M a n u a l
SECTION 3
Initial Set-up, Charging and
Optional Features
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21 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
INITIAL SET-UP: REDMIKE
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.
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
LES 850iR Classroom Amplification System
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.
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.
LES 850iR Classroom Amplification System
6K
250 400 700
2K5
1K 1K4
+10
4K
0
-10
See page 13 for hints on setting the EQ.
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850iR User Manual | 22
8 5 0 i R U s e r M a n u a l
INITIAL SET-UP: OPTIONAL LT-71
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 LT-71 and set the operating
channel to “B”.
A CH
B
OFF
ON
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
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.
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23 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
INITIAL SET-UP: OPTIONAL HM-70
LES 850iR Classroom Amplification System
1. Ensure the 850iR is ON. The RED
LED on the power switch will glow.
2. Turn on the HM-70 by sliding the switch to
the top position.
3. Grip the barrel in the center section.
Avoid covering the infrared emitters
circling the base. This could interrupt
signal transmission.
LES 850iR Classroom Amplification System
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.
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850iR User Manual | 24
8 5 0 i R U s e r M a n u a l
CHARGING THE REDMIKE
1. Plug power cord
into the cradle
charger and
then plug the
AC end into an
electrical outlet.
2. Ensure that the REDMIKE
3. Place the REDMIKE into the cradle. The LED on
the cradle will glow REDindicating charging has
started. When the REDMIKE is fully charged
the LED on the cradle charger will change to
GREEN.
is turned OFF.
Helpful Hint
• 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.
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8 5 0 i R U s e r M a n u a l
CHARGING THE OPTIONAL LT-71
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.
Helpful Hint
the charger for up to two weeks without
d in 8-10 hours.
icrophones will last over 7 hours.
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850iR User Manual | 26
8 5 0 i R U s e r M a n u a l
CHARGING THE OPTIONAL HM-70
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.
Helpful Hint
alkaline batteries. They can overheat
nificant hazard and damaging the
ot covered by the warranty.)
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8 5 0 i R U s e r M a n u a l
OUTPUT TO PERSONAL FM TRANSMITTER
1. Turn the ALD (Assistive Listening Device) volume control on the back panel all
the way down (fully counterclockwise).
4
1
2
3
AUDIO INPUTS
6K
250 400 700 1K 1K4 2K5 4K
+10
VOL.
ADJ.
VOL.
ADJ.
COMPUTER
L
ALD OUT AUX OUT
SENSOR
SHORT
R
L
R
SENSOR INPUTS
TV/VCR
CD/DVD
0
SPEAKER OUTPUTS
DC POWER CHARGERS
4
800iX
ADJ
-10
VOL.
ADJ
INPUT
OFF
ON
OFF ON
OFF
ON
OFF ON
ALD OUT A
24VDC
PA GING INPUT
DC POWER CHARG
OFF ON
24VDC
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).
4
AUDIO INPUTS
6K
3
250 400 700 1K 1K4 2K5 4K
+10
VOL.
ADJ.
VOL.
ADJ.
COMPUTER
L
ALD OUT AOUT
SENSOR
SHORT
R
L
R
SENSOR INPUTS
TV/VCR
CD/DVD
0
DC POWER CHARGERS
ADJ
800iX
-10
INPUT
OFF
ON
ON
PAGING INPUT
24VDC
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.
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.
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850iR User Manual | 28
8 5 0 i R U s e r M a n u a l
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.
LES 850iR Classroom Amplification System
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.
AUDIO
INPUT
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
LES 850iR Classroom Amplification System
3. Adjust the volume of the selected
mic channel to achieve desired
loudness.
Helpful Hint
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.
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8 5 0 i R U s e r M a n u a l
SECTION 4
Troubleshooting, Daily Use
and Warranty
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850iR User Manual | 30
8 5 0 i R U s e r M a n u a l
TROUBLESHOOTING GUIDE
Note: Most problems are directly related to low battery power. Please run through the “Battery
Check” items first. For remaining troubleshooting, use known good, fully-charged batteries.
Battery Check
Low Volume or Feedback
• Confirm batteries are charged
each night.
• Ensure microphone is positioned
appropriately, just below the collar
bone.
• Confirm 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.
• Check volume level on the amplifier. If
the volume is too high, feedback will
occur. Adjust accordingly.
No Sound From Speaker
• Turn the 850iR on. Confirm that the
POWER light located on the front panel
switch is on.
• Make sure the microphones are turned
off while charging so a full charge is
attained. Full charge will last eight
hours.
• Confirm signal is being received at the
850iR. The IR signal light will be RED
indicating a signal is being received.
• Inspect the battery contacts. Clean and
adjust if necessary.
• Confirm that REDMIKE is turned on.
There will be a BLUE LED on
the microphone to indicate it is
powered on.
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.
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.
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31 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
DAILY USE INSTRUCTIONS
1. TURN ON THE 850iR
LES 850iR Classroom Amplification System
Ensure the power is switched on.
2. POSITION 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.
3. TURN ON THE REDMIKE
4. CHARGE BATTERIES
Turn the
Place the REDMIKE back into the
charging cradle to recharge at the
end of the day.
microphone ON
using the ON/
OFF switch on
the side of the
REDMIKE and
speak normally.
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850iR User Manual | 32
8 5 0 i R U s e r M a n u a l
TIPS ON CLASSROOM AUDIO
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 amplification (approximately 5 – 10 dB) above
ambient room noises.
1
2
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.
3
Recharge batteries each night. When recharged nightly, operating
time (actual usage) for the transmitters will last through a typical
school day.
4
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 finish, appearance items, or malfunctions due to abuse
or operation other than specified 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.
Our Service Department (800.732.8999, 5 a.m. – 5 p.m., PST)
will handle all your repair/replacement needs.
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33 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
SYSTEM SPECIFICATIONS
OVERALL SPECIFICATIONS
Power Output.......................................................12 W per channel (48 W total)
Amplifier 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 SPECIFICATIONS
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.
TRANSMITTER SPECIFICATIONS
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.
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.
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.
IR SENSOR SPECIFICATIONS
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.
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850iR User Manual | 34
8 5 0 i R U s e r M a n u a l
INDIVIDUAL COMPONENTS & OPTIONAL ACCESSORIES
Part Number
Description
Infrared receiver/amplifier/mixer
RX-850
Power supply/battery charger for 850iR
PS-24V-2.5
IR-SR70F
CA-PC50F
Infrared sensor with cable and wall or ceiling mounting
bracket
Plenum sensor cable (50 ft.)
REDMIKE classroom microphone
w/lavaliere cord and rechargeable AA battery
RMT
Lightspeed AA rechargeable sensing battery
(for REDMIKE)
BA-NH2A27
Lavaliere cord for REDMIKE
REDMIKE cradle charger
AC-RMLC
BC-RMCC
PS-5V-1.0
Cradle charger power supply
Contact Lightspeed at 800.732.8999 for speaker
information
SPEAKERS
Optional Accessories
LightMic microphone with lavaliere cord, rechargeable
batteries and charging cable
LT71
Handheld microphone with rechargeable batteries and
charging cable
HM70
Noise-canceling headset microphone
Charging cable for LT-71 and HM-70 microphones
Wall shelf
MC-TK250LTM
AC-TCC7
AC-800WB
CA-RCA6
6’ dual RCA audio cable
24’ dual RCA audio cable
CA-RCA24
CA-MSC3535
CA-MMC2535
3.5mm to 3.5mm stereo audio cable
Audio patch cable (2.5 mm mono to 3.5 mm mono)
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35 | 850iR User Manual
8 5 0 i R U s e r M a n u a l
USER NOTES
Record your system serial numbers and
purchase information. This is helpful
when ordering additional components,
accessories, and/or warranty service.
Components
Serial Number
850iR
Microphones
Sensors
Speakers
Purchase Information
Your School/Organization
District
Purchase Date
Invoice
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850iR User Manual | 36
8 5 0 i R U s e r M a n u a l
USER NOTES
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37 | 850iR User Manual
MN0044US0112
Lightspeed Technologies, Inc.
11509 SW Herman Rd
Tualatin, OR 97062
800.732.8999
www.lightspeed-tek.com
MN0044US0112
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