[12]
1. SPEAKERS (1-6) Volume Controls:
These knobs control the output volume
of each corresponding speaker. The
volume level is preset in the middle
position at the factory. LightSPEED
recommends leaving the volumes at
this level for uniform sound throughout
the classroom.
2. SPEAKER OUTPUT (1-6): These 1/4”
jacks are used to connect speaker cable
from the loudspeakers to the LES 780iR.
3. DC POWER: The LES 780iR uses
an AC to DC power converter to supply
power to the amplifier.
4. FM OUT & AUX OUT: These output
jacks send the processed signal to
external equipment—for example, a tape
recorder or an assistive listening device
like LightSPEED’s LES 370 Personal
FM System.
5. ADJ: These knobs control the output
level of the audio source being sent out
of the unit via the FM OUT & AUX
OUT jacks.
6. MIC CHARGE: These jacks are
used to connect the charging cable to the
LightMic or a handheld microphone
for daily battery charging.
7. FILTERS: These speaker filters are cov-
ered with a speaker indicator label and
are factory preset for optimum perfor-
mance. If you have any questions about
these filters or their settings please
call LightSPEED.
Rear Panel Controls
1
2
3
4
5
6
7
8
9
10
11
0. SENSOR INPUTS: The cable from
the IR sensor connects to any of these
six inputs. Up to six IR sensors can be
connected to the LES 780iR for use in
large or odd shape classrooms.
1. SENSOR SHORT: If there is a short in
one of the sensor cables, this LED glows
as a warning signal.
1
1
8. AUDIO INPUTS (TV/VCR,
CD/TAPE, COMPUTER, AUX):
These RCA input jacks receive audio
input from external audio sources
(TV/VCR, CD/tape, computer, etc).
9. EQUALIZATION:
The three frequency
equalization adjustments are factory set
for normal classroom environment.
• LOW: Controls low-frequency.
• MID: Controls mid-frequency.
• HIGH: Controls high-frequency.
HM-70 Controls
1. Power Switch: This 3-position
switch allows you to turn the micro-
phone on (up position), mute the
microphone (middle position), and
turn off the microphone (down posi-
tion). The red LED above the switch
lights when the switch is in the
“mute” or power “on” positions.
2. Channel Select Switch: This switch
allows you to choose between Channel
A or Channel B. This switch is set to
Channel B at the factory.
3. Power/Charge LED Indicator: This
two-color LED indicator is located
directly above the power switch. It
glows red when the HM-70 is powered
on and glows green when charging.
4. Charger: Use this jack to connect the
charging cable from the 780iR to the
HM-70 for daily battery recharging.
[7]
Optional HM-70 Handheld
Microphone/Transmitter:
Overview
The HM-70 handheld microphone/
transmitter is an optional microphone
that can be ordered from LightSPEED.
It can be used alone or in tandem with the
LT-70 LightMic.
Do not attempt to charge alkaline
batteries̶they can overheat and
expand, creating a significant hazard
and damaging the LightMic.
[ caution! ]
(This is not covered by the warranty.)
Power/Charge LED
Indicator
Power Switch
Charging Jack
Battery
Compartment
Channel Select Switch
Gain Adjust
3
1
4
2
slide to open
top view of battery compartment
