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SYSTEM INSTALLATION
Unpacking Your System
Location of the Receiver/Amplifier
IR Sensor Placement
Place the 820iR on a flat surface like a
bookcase, countertop or optional Light-
SPEED wall shelf (part#AC-800WB).
• Select a location that is close to a
standard wall electrical outlet.
• Wires will be routed back to the
amplifier, so select a location that is
free from obstructions that may make
routing wire difficult. (Example: under
a whiteboard or bulletin board.)
Sensor location is very important for
optimum performance of the 820iR
Classroom Amplification 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
• Ensure that you have received
all of the components of
your system.
• 820iR Receiver/Amplifier
and power supply
• LT-71 LightMic
™
Transmitter
• SR-70F Infrared Sensor
and cable
• Speaker(s) and speaker wire
< GOOD
3 | 820iR Users Manual
820iR Users Manual | 16
8 2 0 i R U s e r M a n u a l
8 2 0 i R U s e r M a n u a l
Helpful Hint
Fine-tuning the Graphic Equalizer:
1. Verify that the EQ is set to match the recommended setting for the specific
speakers installed in the classroom (settings included with the speaker install guide).
2. Walk around room (near speakers) and listen for squealing or feedback.
3. Lower the 2K5 and/or 4K sliders if a high-pitched squealing is present.
4. Lower the 400 or 700 sliders if a low-pitched ring is present.
5. Reduce volume if feedback is still present.
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 amplification system provides
adequate amplification (approximately 5 – 10 dB) above
ambient room noises.
LightSPEED Classroom Amplification 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 period and under the limitations stipulated
in the data sheet or the user’s manual.
1. Limited exclusions specifically apply to all microphone elements, rechargeable
batteries, battery chargers and their assemblies, as well as external cables and wires.
2. Warranty on microphones/microphone elements is limited to original manufacturer’s
warranty (usually ONE (1) YEAR).
3. Warranty on LightSPEED NiMH AA rechargeable batteries is ONE (1) YEAR.
3. Warranty on LightMic’s internal microphone is FIVE (5) YEARS.
4. Prepaid shipping label provided by LightSPEED factory or an authorized warranty
service center.
5. 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.
TIPS ON CLASSROOM AMPLIFICATION
Avoid wearing jewelry that may rub or bump against
the microphone.
Turn the LightMic off during private conversations with a student,
parent, or other classroom visitor. You can also cover the LED
lens on top of the LightMic 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.
Our Service Department (800.732.8999, 6:30 a.m. – 5 p.m.,
PST) will handle all your repair/replacement needs.
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Five-year Limited Warranty