LES 880iR Classroom Amplification System
1
2
3
4
5
6
OPERATING THE OPTIONAL HM-70 HANDHELD MIC
ON
OFF
MUTE
(Center Position)
7 | 880iR User Manual
880iR User Manual |16
8 8 0 i R U s e r M a n u a l
1.
SPEAKER OUTPUTS:
These euro-block
connectors are used to connect the
880iR to the loudspeakers. Depending
on the speaker package, all the out-
puts may not be used.
2.
SPEAKER VOLUME (1–6):
These knobs
control the output volume of each cor-
responding speaker. Under normal
conditions, the volume controls should
remain in the center (12:00) position.
3.
DC POWER:
Plug the 24 V power
supply into this jack.
4.
CHARGERS:
These jacks charge the
LightMic(s) and optional handheld
microphone with the supplied charg-
ing cable(s) and charging cradle.
5. CH A PRIORITY SENSITIVITY:
Adjusts the audio level required to
activate the priority function. Fully
counterclockwise requires a much
stronger audio level to activate the
function (less sensitivity).
6. CH A PRIORITY CONTROL:
This
3-position switch activates the
Teacher Voice Priority function.
7.
ALD/AUX AUDIO OUT:
These output
jacks send audio signal to external
equipment such as a recorder or an
assistive listening device like the
LES-370 Personal FM System.
8.
ALD/AUX VOL
ADJ:
These controls
adjust the output level of the audio
being sent out of the receiver/
amplifier via the ALD/AUX AUDIO
OUT jacks.
SPEAKER
OUTPUTS
250 400
700
1K
1K4
2K5
4K
6K
+10
0
-10
AUX
VOL
ADJ
COMPUTER
AUDIO INPUTS
TV/VCR CD/DVD
800iX
INPUT
PAGING INPUT
DC POWER
CHARGERS
24VDC
L
R
SENSOR INPUTS
SENSOR
SHORT
1
2
3
4
AUX
ALD
VOL
ADJ
ALD
OUT
AUX
OUT
CH A
PRIORITY
R
L
ADJ
SPEAKER
VOLUME
5
6
CH. B/Audio IN
Audio
IN
OFF
2
4
3
REAR PANEL CONTROLS
3. Grip
the barrel of the HM-70 in the
center section just below the power
switch. Avoid gripping the HM-70
around the bottom, covering the
infrared emitters circling the base.
This could interrupt signal trans
mission from the microphone to
the receiver.
4. Speak
directly into the microphone
at a normal level. Slowly increase
the B VOLUME until you can just
hear your voice.
5. Slide
the switch to the OFF position
to turn off the HM-70. (Make sure the
power indicator light is off.)
The Channel A/B switch is located
inside the battery compartment.
The switch is set to Channel B at
the factory.
1. Slide
the power switch on the side
of the HM-70 all the way up. The
power indicator LED will glow red
and stay on.
2. The center
position of the power
switch is MUTE. When in this mode,
the HM-70 is transmitting a signal,
but no audio can be heard through
the system. This is useful if you
wish to temporarily turn audio off
during a private conversation.
8 8 0 i R U s e r M a n u a l
1
5
6
7
9
8
Teacher Voice Priority
• OFF:
Normal operation—turns Teacher Priority off.
• CH.B/Audio IN:
Teacher’s voice (the microphone set to Channel A) has priority over the student
microphone (Channel B) and audio inputs. When the teacher speaks into the microphone, the audio
of the other sources will mute. When the teacher quits talking or the LightMic is turned off, the
audio returns.
• Audio In:
Teacher’s voice has priority over any audio sources that are plugged into the Audio Inputs
only (Computer, TV/VCR, CD/DVD, etc.). When the teacher speaks into the microphone, the audio
of the input sources will mute. When the teacher quits talking or the LightMic is turned off, the
audio returns.
This feature allows the teacher’s voice to be heard over the other audio being played
through the 880iR. The three position switch has the following functionality:
