System Installation
1. Unpacking Your System
• Ensure that you have received all of
the components to your system.
• Locate the speaker installation
instruction sheet that is packed with
your speakers.
• Keep ALL packaging materials.
If the system must be returned, it
will be quick, convenient and
undamaged.
2. Location
Before installing the system, take time
to consider the placement of your
components.
• Infrared (IR) Sensor: Consider areas
of dark color in the room as they
reflect less infrared light. Sensor
mounting locations should be closer
to dark areas to improve reception.
• Receiver: Place on flat surface close
to standard electrical outlet.
• Speaker: Refer to the speaker
installation sheet that is included
with the speaker for placement
needs.
• Speaker Wire and Sensor Wire:
Plenum wire is included for
each. Ensure the wire length will
cover the area from where you hang
the sensor and speaker(s) to where
you place the receiver. It’s optimal to
route wire overhead (above ceiling
tiles) if possible. In addition, wire
can be routed down the wall and
around the room perimeter secured
with heavy staples or wire raceway.
3. Speaker(s)
• Locate the speaker installation
instructions packed with your
speaker(s).
• Follow instructions and mount
speakers(s).
• Return to the LES 780iR manual to
complete the set up of your system.
4. Receiver/Amplifier
• Place the LES 780iR on a flat surface
like a bookcase or countertop.
• Ensure that the A VOLUME
and B VOLUME knobs are
turned all the way down (fully
counter-clockwise) and the POWER
switch is the OFF position.
• Connect the speaker wire(s) to the
appropriate 1/4” SPEAKER OUT
jacks on the back of the LES 780iR.
(Refer to your speaker instructions
for additional information.)
• Plug the power cord into a standard
110 V electrical outlet and attach the
other end into the DC POWER jack
on the back of the LES 780iR.
• Switch the power on the front
panel to the ON position. The red
power indicator on the switch
will light.
Overall System Specifications:
Carrier Frequencies (IR)
2.06/2.54 MHz
Frequency Stability
+/‒ 3%
Maximum Deviation
+/‒ 50 kHz
Dynamic Range
> 80 dB
Signal-to-Noise Ratio
> 90 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 (72 W)
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
CD/Tape
RCA ‒ Line Level
Computer
RCA ‒ Line Level
Auxiliary
RCA ‒ Line Level
IR Sensors (6)
“F” Connector
Outputs:
Auxiliary Outputs (2)
3.5 mm
Speaker Outputs (6)
1/4”
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
40 ft., Plenum-rated Co-ax
Mounting
Ceiling clip/Wall bracket
Diodes
32
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