Manual

3
front of IMA-820 receiver/amplifier
back of IMA-820 receiver/amplifier
Power on/off
CH A Microphone Volume Control
CH B Microphone Volume Control
DVD Volume Control
Computer Volume Control
Speaker Output - Two Channel
Four pin Phoenix connector
Fire Alarm - AC/DC 5-24 volt
Page Pass Through 2 pin Phoenix
Sensitivity control
Impedence selector
Five band digital equalizer
±12 dB
Two Sensor Inputs (RCA)
5 Volt USB for BRC-55 charger
Power Input: 19 VDC 3.4A
Aux Volume Control
MP3 Volume Control
MP3 Input (3.5mm)
Lesson Capture Volume Control
Lesson Capture Output (3.5mm)
ALS gain control
ALS Input 3-5mm
RS-232 Tx,Gnd,Rx -3 pin
Security Alert - Com,N/O,N/C -3pin
Aux-Mic Input Selector
Aux-Mic Input 3.5mm
Computer Input 3.5mm
Computer Anti hum ON/OFF
DVD dual Mono Inputs (RCA)
1
2
3
4
5
6
7
8
9
10
10
1 1
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
7
6
5
4
3
2
1
Spectrum III system
The Spectrum III system is comprised of a microphone / transmitter, either
the Sapphire (IRT-60), or Handheld (IRH-35) for voice transmission to a
ceiling sensor (ICS-55) that sends the signal to the receiver / amplifier (IMA-
820). The receiver/amplifier processes the signal and produces an analog
signal of your voice for output to the sound field speaker system.
CH A CH B
AUX
LESSON
CAPTURE
OUTPUT
INPUT
DVD COMPUTER
MP3
Spectrum III
8
9
10
INPUTS
COMPUTER
DVD
SENSOR
POWER
19V DC
3.4A MAX
EQUALIZER
SPEAKER OUTPUT
B
+
_
1
2
3
+
_
RS232
SECURITY ALERT
FIRE ALARM
AC/DC 5-24V
1KHZ
300
100
MIC
1 Tx
2 Gnd
3 Rx
COM
N/O
N/C
COMP/ANTI-HUM
4ohm load = 25watts/amp
10KHZ
3KHZ
ON
OFF
AUX
SENSITIVITY
ALS
PAGE INPUT OUTPUT
100V
70V
25V
5 VOLT
OUTPUT
A
+
_
+
_
7
6
5
4
3
2
1
8
10
INPUTS
COMPUTER
DVD
SENSOR
POWER
19V DC
3.4A MAX
EQUALIZER
SPEAKER OUTPUT
B
+
_
1
2
3
+
_
RS232
SECURITY ALERT
FIRE ALARM
AC/DC 5-24V
1KHZ
300
100
MIC
1 Tx
2 Gnd
3 Rx
COM
N/O
N/C
COMP/ANTI-HUM
4ohm load = 25watts/amp
10KHZ
3KHZ
ON
OFF
AUX
SENSITIVITY
ALS
PAGE INPUT OUTPUT
100V
70V
25V
5 VOLT
OUTPUT
A
+
_
+
_
9
11 12 13 14
15
16 17 18