2. Ensure speaker wire
connections are secure
and not frayed.
1
2
SPEAKER OUTPUTS
250 400 7001K 1K4 2K5 4K 6K3
+10
0
-10
AUDIO INPUT
CHARGERS
DC
POWER
TV/VCR CD/DVD
L L
RR
24V
DC
SENSOR INPUT
SENSOR
SHORT
2.06/2.54
POWER
A VOLUME B VOLUME TV/VCR CD/DVD ASSISTIVE LISTENING
IR IR
AF AF
WIRELESS MICROPHONE VOLUME AUDIO INPUT VOLUME ALD VOLUME
LES 820iR Classroom Amplification System
820iR User Manual | 8
11 | 820iR User Manual
820iR User Manual 820iR User Manual
3. Connect the charging cables to yellow charging jacks labeled
“CHARGERS.” The loose end will be connected to the charger
input on the microphone.
1. Ensure the power switch is in the “OFF” position
and all front panel volume controls are turned
fully counter-clockwise.
6. Connect DC end of power supply
to the black power jack labeled
“DC POWER.”
7. Connect the black AC power cable
from the power supply to a wall outlet.
FINALIZING RECEIVER/AMPLIFIER CONNECTIONS
INITIAL SET-UP
4. Connect any auxiliary audio
sources to corresponding
labeled input.
5. Ensure sensor cable is attached
securely.
>>
>>
>>
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.
Dispose of remaining system-packing material in the appropriate refuse containers.
Leave microphones charging so they are ready for use. Microphones will need to be
charged on a daily basis.
FINAL CHECK
>>
SPEAKER OUTPUTS
250 400 7001K 1K4 2K5 4K 6K3
+10
0
-10
AUDIO INPUT
CHARGERS
DC
POWER
TV/VCR CD/DVD
L L
RR
24V
DC
SENSOR INPUT
SENSOR
SHORT
2.06/2.54
>>
LightSPEED amplifier controls the volume of each source
individually (one volume control for each source).
SYSTEM INTEGRATION DIAGRAM
Projector
DVD/VCR
Speaker(s)
IR Sensor
Teacher’s
Microphone
Projector
Audio Out
IR Transmission
Video In
LT-71
Audio Out
Video Out
POWER
A VOLUME B VOLUME TV/VCR CD/DVDASSISTIVE LISTENING
IR IR
AF AF
WIRELESS MICROPHONE VOLUMEAUDIO INPUT VOLUME ALD VOLUME
LES 820iR Classroom Amplification System
Video Out
SPEAKER OUTPUTS
250 400 700 1K 1K4 2K54K 6K3
+10
0
-10
AUDIO INPUT
CHARGERS
DC
POWER
TV/VCR CD/DVD
L L
RR
24V
DC
SENSOR INPUT
SENSOR
SHORT
2.06/2.54