Atlas Sound AA120M Stereo Amplifier User Manual


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Specifications are subject to change without notice
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1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: (800) 876-3333 • FAX: (800) 765-3435
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
7
REAR PANEL DESCRIPTION
9. Dipswitch 1-10
Understanding the functionality of the dipswitches is key to getting the most out of the AA120M.
Whether a switch is in the "Up" or "Down" position is critical to the function of the amplifi er. Note:
Mispositioning any of these switches may cause harm to the speakers or amplifi er. We recommended
powering off the amplifi er prior to making any switch selections. Pay close attention to the assignment
chart and manual for proper settings.
Dipswitch 1- LOW CUT – When in the "ON" position, frequencies below 400Hz are attenuated
at the rate of 6dB per octave. Note: The rotary bass control is bypassed when the LOW CUT fi lter
is engaged. We suggest that when paging horns are connected to the AA120M, engage the LOW
CUT fi lter to prevent the horns from operating below their cutoff frequency. When "OFF", the
amplifi er operates full bandwidth.
Dipswitch 2- VCA – When set to the "Master" position, the VCA control port acts as a system
remote volume control, adjusting all the input channels up or down simultaneously. When set to
the "Input 5" position, the VCA remote control port affects only the level of INPUT 5.
Dipswitch 3- PHANTOM – When set to the "OFF" position, PHANTOM POWER is turned off
on INPUTS 1-4. When set to the "ON" position, PHANTOM POWER (24VDC) is available on
INPUTS 1-4.
Dipswitch 4- Relay ACT - When set to the "CC" position, the internal relay is triggered by
contact closure (see page 32). When set to the "VOX" position, the internal relay is triggered by
audio signals at INPUTS 1-4 and INPUT 6, depending upon their rear panel switch setting.
Vox M uteVox M ute
Input 5
Level
Zone 3
Level
Zone 2
10
0
10
0
10
0
10
0
10
0
10
0
10
0
G–+G–+G–+ G–+
Unswitched Outlet
120V AC 60Hz
Max 500W
Outlet Breaker
125V AC 4A
Push Reset
120V AC 60Hz 300W
100V70V25V
¡
8Com
24V DC 200mA
Relay

+
–
NC
C
NO
–+ +–
Zone 2 Out
1W 8
Zone 3 Out
¡ ¡
600
Remote Mute VCA
+–
G
Sel
Bridge
In/Out
Input 6
Level
Zone 3
Level
Zone 2
100100
Sens
Input 4
Trim
Input 3
Trim
Input 2
Trim
Input 1
Trim
Mute
10010
0
10
0
10
0
100100100
Send
Off
Rcv
Send
Rcv
Off
Send
Off
Rcv
Send
Off
10
0
Zone 2 Level
Zone 3 Level
Input 3 Input 2 Input 1
Pwr In
Tape Out
12345678910
R
Line Out
L
Input 5
Pre Out
Input 6
Input 4
Zone 2 Level
Zone 3 Level
Zone 2 Level
Zone 3 Level
Zone 2 Level
Zone 3 Level
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Speaker Output 120W
Vox M ute
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mute
Chime Module
9
On
Mic
Mic
Mic
Mic
300mV
Amp Dir
Vox
Input 5
On
Relay
Act
Low Cut
Input 3
Input 4Input 5
Input 6
Phantom
Input 1
Input 2
1
9
87
6
5342
10
VCA
Off
Line
Line
Line
Tel/Line
100mV
Mix Bus
CCMaster
Off
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