LightSpeed Technologies 850iR Manuel D’Utilisation

USER NOTES

Record your system serial numbers and 

purchase information. This is helpful 

when ordering additional components, 

accessories, and/or warranty service.

850iR

Microphones

Speakers

Your School/Organization

District

Purchase Date

Invoice

Sensors

  8 5 0 i R   U s e r   M a n u a l

8 5 0 i R   U s e r   M a n u a l

 

Congratulations on your purchase  
of the 850iR Classroom Amplifica-
tion System! This simple, yet power-
ful technology provides crystal-clear 
sound throughout the classroom,  
allowing every child to hear every 
word every time.

As the teacher speaks into the 
LightMic pendant-style transmitter, 
his or her voice is transmitted to the 
850iR and then amplified through the 
loudspeaker(s). The standard system 
includes the 850iR infrared receiver/
amplifier, LT-71 LightMic

™

 

transmit-

ter, SR-70 infrared sensor and speaker 
package.

The 850iR is a two-channel receiver 
amplifier that allows the use of up 
to two microphones simultaneously 
and up to three additional audio input 
sources (such as TV, VCR, DVD, CD, 
MP3, 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-71 LightMic is a wireless, pen-
dant-style transmitter. This two-chan-
nel, rechargeable unit is clipped to a 
lavaliere cord and worn around the 
neck for teacher use, or it can be used 
like a standard handheld microphone 
for the students to pass around when 
speaking.

LT-71

850iR CLASSROOM AMPLIFICATION SYSTEM

250 400

700

1K

1K4

2K5

4K

6K

+10

0

-10