Lightspeed LES 750iR, User Manual

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POWER
LES - 750IR
AUX 2 VOLUME AUX 1 VOLUME B VOLUME A VOLUME
IR AF
IR AF
Overall System Specifications:
Carrier Frequencies (IR) 2.06/2.54 MHz
Frequency Stability +/– 3%
Maximum Deviation +/– 50 kHz
Dynamic Range > 73 dB
Signal-to-Noise Ratio > 73 dB
Frequency Response 40 Hz - 20 kHz (– 3 dB)
Receiver Specifications:
Receiver Type Superheterodyne
Receiver Sensitivity 6 µV for 60 dB S/N ( > 25 dBuV)
Image and Spurious Rejection > 40 dB
Reception Selectivity 40 kHz
Squelching Threshold 3.2 µV
Amplifier Specifications:
Power Output (System Total) 12 W per channel (48 W total)
Total Harmonic Distortion < 1% @ 20 W
Speaker Load Impedance 4 Ohms
Power Supply (UL Listed) 24 V/2.5 A
Dimensions 18 x 9 x 3 (H x W x D inches)
Weight 7 lbs.
Inputs:
TV/VCR RCA – Line Level
IR Sensors (2) “F” Connector
Outputs:
Auxiliary Outputs (2) 3.5 mm
Speaker Outputs (4) Binding Post Connectors
Transmitter Specifications:
Audio Distortion < 1%
Spurious Emissions < 30 dB
Built-in Microphone Uni-directional Electret
Battery Power (1-year warranty) 2 AA NiMH Rechargeable
Dimensions 1.4 x 1 x 4.6 (W x D x H inches)
Weight 3.04 oz (w/batteries)
External Sensor:
Power By Receiver Unit
Reception Coverage 360 º, Ceiling-mount
Cable 50 ft., Plenum-rated Co-ax
Mounting Ceiling clip/Wall bracket
Diodes 32
LES 750iR Infrared Classroom Amplification System:
Overview
Congratulations on your purchase of the
LES 750iR Infrared Classroom Amplification
System! This simple, yet powerful technol-
ogy provides crystal clear sound through-
out the classroom, allowing every child to
hear every word every time.
As the teacher speaks into the LightMic
pendant-style microphone, his/her voice
is transmitted to the 750iR and then
amplified through the loudspeaker(s). The
standard system includes the LES 750iR
receiver/amplifier, LT-70 LightMic micro-
phone/transmitter, SR70 infrared sensor
and speaker package.
The LES 750iR is a two-channel receiver
amplifier that allows the use of up to two
microphones simultaneously and up to
two additional audio input sources (such
as TV, VCR, DVD, CD, cassette, PC, LCD pro-
jector, 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 LT-70 LightMic is a wireless, pendant-
style microphone/transmitter. This two
channel, rechargeable unit is clipped to a
lavaliere cord and worn around the neck
for the teacher to use or can be used like a
standard handheld microphone for the
students to pass around when speaking.
LES 750iR Infrared Receiver/Amplifier
LT-70 LightMic™
Microphone/
Transmitter
SR-70 Infrared Sensor
HM-70 Handheld Microphone
(optional)
(The system also includes your choice of speaker package.)
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