User manual

Overall System Specifications:
Carrier Frequencies (IR) 2.06/2.54 MHz
Maximum Deviation +/‒ 50 kHz
Dynamic Range > 70 dB
Signal-to-Noise Ratio > 70 dB
Total Harmonic Distortion < 4 %
Frequency Response 100 Hz - 10 kHz
Receiver/Amplifier Specifications:
Receiver Type Superheterodyne
Receiver Sensitivity 6 µV for 60 dB S/N
Image and Spurious Rejection > 70 dB
Amplifier Specifications:
Total Harmonic Distortion < 1 % (Output = 1 W)
Power Output 12 W RMS
Speaker Type Standard Cone (4 inches)
Speaker Load Impedance 4 Ohms
Adjustable Tone Controls +/‒ 8 dB (100 Hz - 10 kHz)
Power Supply (UL Listed) 16 V/2.0 A
Battery Power (1-year warranty) 12 V NiMH Battery Pack
Dimensions 13.25 x 5.75 x 4 (H x W x D inches)
Weight 5 lbs. w/battery pack
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)
Overview
e 705iR is a lightweight, multipurpose,
portable amplification system powered by
rechargeable batteries or AC power. It is
designed to allow teachers to speak in nor
-
mal conversational tones and yet be heard
clearly by every student in the classroom.
e 705iR comes standard with the LT-70
LightMic™ pendant-style transmitter/
microphone. e system may be used with
two microphones accommodating team
teaching or student interaction. e second
microphone can be an additional LightMic
or the HM-70 handheld microphone.
Other optional microphones can also be
plugged into the LightMic. Contact
LightSPEED for assistance in selecting
optional microphones.
Top Panel Controls
1. CH A POWER: is knob turns on
the power for the 705iR and controls
the Channel A volume. We recom-
mend using Channel A if you are
using a single microphone for your
system. Turn the knob clockwise to
increase volume.
2. CH B VOLUME: is knob controls
the volume for Channel B. You must
first turn the 705iR ON with the
CH A POWER knob, then turn the
CH B VOLUME knob clockwise to
increase volume. Use Channel B
when using a second microphone.
3. TREBLE: is knob controls the
high-frequency sound of the 705iR.
6
4
2
POWER
Aux. Out
Jack
Aux. In
Jack
Ch. A and Ch. B
LEDs are hidden by
their corresponding
volume knobs in this
diagram
.
Ch. A
LED
Ch. B
LED
8
7
5
3
1
9
10
[3]
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