Atlas AA120M User manual

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
AA120M Atlas Sound Mixer Amplifier

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Signal Power
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Peak
Input 6
Input 5
Input 4
Input 3Input 2
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Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
2
TABLE OF CONTENTS
Safety Instructions…………………………………………………………………………………………………..2
Introduction, Features, and Applications………………………………………………………………………….3
Safety Precautions……………………….......................................................................……………………..4
Front Panel Description…………………………………………………………………………………………….6
Rear Panel Description…………………………………………………………………………………………….7
Quick Start Examples......................................................................…………………………………..……..15
Wiring the AA120M…………...................................................................................……………………..…21
Rack Mount Kit…...…………...................................................................................……………………..…22
Internal Jumper Locations………………………………………………………………………………………...23
Block Diagram...………......................................................................…………………………………..…...24
Specifications..........................................................................................……………………………………27
Warranty................................................................................................……………………………………..28
SAFETY INSTRUCTIONS
Please be sure to read all the instructions carefully before using this product.
• Many safety messages are included in this manual, please be sure to observe these as they are
important.
• We recommend that you keep this manual close by for future reference.
• Do not install this device in dusty or humid locations, or in direct exposure to sunlight. In addition,
locations that have steam or sooty conditions are not to be used, as this may result in fire or electric
shock.
• Prevent the power cord from damage, pinching or being walked on, in particular, the plug and
where the cord attaches to the amplifier.
• Do not defeat the polarized or grounding feature of the power cord plug. If the plug will not fit in your
outlet, consult a licensed electrician.
• Use only the accessories and attachments specified in this manual.
• Disconnect the power cord during electrical storms, or when the product will be unused for long
periods.
• Have servicing done only by qualified personnel. Servicing will be required when the product is
damaged in any way, when the power cord is damaged, when liquid has been spilled or objects have
fallen into the device. Servicing will also be required when this device has been exposed to rain, does
not operate normally, or has been dropped.

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
3
INTRODUCTION
Congratulations and thank you for purchasing the Atlas Sound Model AA120M professional grade mixer/
amplifier. An integral part of the AA Series of commercial products, the AA120M was engineered and
integrated with unique features to assist the contractor/installer in today’s commercial business audio
environment.
FEATURES
• Zone 1 output 120W
• Zone 2 output 1W@ 8Ω
• Zone 3 output 1.5V@ 600Ω
• Inputs 1-4 mic/line switchable
• Input 5 line level
• 1 Module Input
• Inputs 1-4 and 6 can send or receive mute commands
• 2 Mute Buses, 1 VOX, and 1 contact closure
• 1 Tape and 1 Line outputs
• Mute assignable internal relay
• 24VDC available on rear panel for priority attenuators
• Pre-amp out-Power amp in loop
• Bridge In/Output - Allows mix bus combining of multiple AA120Ms
APPLICATIONS
• Industrial paging
• Retail paging and BGM
• Commercial PA
• Priority volume control applications
• Hotel ballroom/meeting rooms
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Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
4
SAFETY PRECAUTIONS
• Read the instructions very carefully before using this product.
• Observe the instructions in this manual as conventions of safety; symbols and messages regarded as
important precautions are included.
• Retain this manual for future reference.
Message Conventions and Safety Symbols
Before installing and operating this product, read this manual so you are fully aware of the potential
safety hazards and understand the safety symbols and messages. The safety symbols and messages
shown below are used in this manual to prevent bodily injury and property damage from mishandling.
Indicates a potentially hazardous situation which, if mishandled, could result
in death or serious injury.
Indicates a potentially hazardous situation which, if mishandled, could result
in moderate or minor personal injury, and/or property damage.
WHEN INSTALLING THE PRODUCT
• Do not expose the product to rain or in an environment where it may be exposed to water or other
liquids, which may result in fire or electric shock.
• Operate the product only with the voltage specified on the unit. Fire and/or electric shock may result if
a higher voltage is used.
• Do not modify, kink, or cut the power cord. Do not place the power cord on close proximity to heaters
and do not place heavy objects on the power cord, including the product itself, doing so may result in
fire or electric shock.
• Replace the protective cover over the speaker terminals after installation. Do not touch the 70V
speaker terminals as electric shock may result.
• Ensure that the safety ground terminal is connected to a proper ground. Never connect the ground to
a gas pipe as a catastrophic disaster may result.
• Be sure the installation of the product is stable, avoid slanted surfaces as the product may fall and
cause injury or property damage.
WHEN THE DEVICE IS IN USE
• To prevent electric shock, do not remove the product cover as there are high voltage components
inside. Refer all servicing to Atlas Sound.
• Should any of the following irregularities occur during use, immediately switch off the power,
disconnect the power cord from the AC outlet and contact Atlas Sound. Do not to attempt to continue
operation with the product as this may cause fire or electric shock.
• Smoke or strange smell coming from the unit.
• If the product falls or the case is damaged.
WARNING
CAUTION
WARNING
WARNING

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AtlasSound.com
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©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
5
• If water or any metallic objects falls, into the product.
• If the power supply cord is damaged in any way.
• If the unit is malfunctioning.
• Do not insert or drop metallic objects or flammable materials into the ventilation holes of the product's
cover, as this may result in electric shock or fire.
• Do not place any containers with liquid or metallic objects on the top of the product. If any liquid spills
into the unit, fire or electric shock may result.
• Never operate this product or touch the power supply cord during an electrical storm, electric shock
may result.
• Never exceed the wattage on the product when connecting equipment. Fire and or property damage
may result.
WHEN INSTALLING THE PRODUCT
• Plugging in or unplugging the power cord with wet hands may result in electric shock.
• Never move the unit with the power cord plugged into the wall, as damage to the power cord may
result. When unplugging the cord from the wall, grasp the plug, NOT the cord.
• Never block the panel vents in the product's cover. Heat buildup may result inside the unit and fire may
result.
• Never install this product in humid or dusty locations, nor in direct sunlight, near sources of heat, or in
areas where sooty smoke or steam in present. Fire and electric shock may result.
WHEN THE PRODUCT IS IN USE
• When powering the product up for the first time, ensure that the volume controls are turned down.
Unexpected high sound pressure levels may be present at the speakers and result in hearing loss.
• Never place heavy objects on the product, causing it to fall and or break, resulting in personal injury
and property damage. In addition, the product itself may fall and cause injury and property damage.
• Never operate the product for extended periods with the sound in a distorted condition. This is an
indication of a malfunction, which may result in excessive heat being generated and causing a fire.
• Contact Atlas Sound for instructions on cleaning the inside of the unit. Large accumulations of dust
inside the unit may result in heat buildup and fire.
• Ensure that the power supply plug in securely plugged into the wall outlet. Never allow dust to
accumulate on the power plug or inside the wall outlet.
• When cleaning the unit or the unit is not to be operated for an extended time period, unplug the power
cord from the wall.
CAUTION
CAUTION

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
6
FRONT PANEL DESCRIPTION
1.
1. Power Switch
This push on/push off switch applies power to the AA120M.
2. Power LED
This LED illuminates when the power switch is turned on.
3. Peak LED
The PEAK LED will illuminate when the AA120M is in a clipping condition, caused by excessively high
input levels or a GAIN control is turned up too high. An occasional flash is OK.
4. Signal LED
This LED will assist you in setting gain structure into the amp. With a source connected to the amp and
playing, turn up the channel gain control until this LED just starts to flash. Once all the sources
connected are playing, the SIGNAL LED may be on solid. This condition is normal.
5. Master Gain Control
The MASTER GAIN CONTROL will raise or lower all the input channels together. A good starting point
for setting gain structure is to set MASTER GAIN CONTROL at the 12:00 position, and then adjust
the individual channels one at a time.
6. Input 1-6 Controls
The gain for input channels 1-6 are controlled by these rotary controls. The MASTER GAIN CONTROL
must be turned up in addition to the input controls for audio to be present at the speaker terminals.
7. Bass Control
Normally set at the 12:00 position, rotating clockwise will increase (boost) bass frequencies by
10dB at 100Hz. Rotating counter-clockwise from the 12:00 position will decrease (cut) bass frequencies
by 10dB at 100Hz
8. Treble Control
Normally set at the 12:00 position, rotating clockwise will increase (boost) treble frequencies by 10dB at
10kHz. Rotating counter-clockwise from the 12:00 position will decrease (cut) treble frequencies by
10dB at 10kHz.
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On
Off
Peak
Input 6
Input 5
Input 4
Input 3Input 2
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2
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Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©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 amplifier. Note:
Mispositioning any of these switches may cause harm to the speakers or amplifier. We recommended
powering off the amplifier 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 filter
is engaged. We suggest that when paging horns are connected to the AA120M, engage the LOW
CUT filter to prevent the horns from operating below their cutoff frequency. When "OFF", the
amplifier 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.
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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
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24V DC 200mA
Relay
+
–
NC CNO –+ +–
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
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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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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
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6
534210
VCA
Off Line Line Line Tel/Line
100mV
Mix Bus
CCMaster Off

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
8
Dipswitch 5 - Input 6 - When set to the "Mix Bus" position, INPUT 6 signals are routed to the
Mix Bus and are POST Input Gain, POST Zone 2 and 3 Outputs and PRE Tone Controls.
When set to the "Amp Direct" position, INPUT 6 signals go directly to the final amplifier stage,
and are PRE Input Gain, PRE Zone 2 and 3 Outputs and POST Tone Controls.
Dipswitch 6 - Input 5 - When set to the "100mV" position, the sensitivity of Input 5 is suitable
for inputting Telephone Paging Signals. When set to the "300mV" position, the sensitivity of
Input 5 is suitable for CD/DVD player outputs.
Dipswitch 7 - Input 4 - When set to the "Line" position, Input 4 sensitivity is suitable for CD/
DVD line level outputs. When set to the "Mic" position, Input 4 sensitivity is suitable for
microphone input.
Dipswitch 8 - Input 3 - When set to the "Line" position, Input 3 sensitivity is suitable for CD/
DVD line level outputs. When set to the "Mic" position, Input 3 sensitivity is suitable for
microphone input.
Dipswitch 9 - Input 2 - When set to the "Line" position, Input 2 sensitivity is suitable for CD/
DVD line level outputs. When set to the "Mic" position, Input 2 sensitivity is suitable for
microphone input.
Dipswitch 10 - Input 1 - When set to the "Tel/Line" position, Input 1 sensitivity is suitable for
CD/DVD line level outputs. When set to the "Mic" position, Input 1 sensitivity is suitable for
microphone input.
10. Input 1
Balanced mic or line level signals connect to the (+), (—), and (G) terminals. Refer to the chart at the
top of the page for the following setting. Dipswitch number 10, labeled Input 1 must be set to the
proper position for mic or line level. If you are connecting an unbalanced line level input, tie (short)
the (G) and (—) terminals together. An optional Input Isolation Transformer is available if a ground
loop problem exists. See page 23 for installation. Contact Atlas Sound for more details on the Input
Isolation Transformer.
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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
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24V DC 200mA
Relay
+
–
NC CNO –++–
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
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R
Line Out
L
Input 5
Pre Out
Input 6
Input 4
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Send
Off
Rcv
CLASS 2 WIRING
Vox Mute
Chime Module
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
19 87
6
534210
VCA
Off Line Line Line Tel/Line
100mV
Mix Bus
CCMaster Off
10

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
9
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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 CNO –+ +–
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
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VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mute
Chime Module
11. Input 1 Trim
This variable control adjusts the sensitivity of INPUT 1. When the dipswitch is set to "Mic" it allows fine
tuning of the input gain structure to the AA120M. There is 20dB of variable gain available. This feature
is PRE channel level control.
12. Mute Sens For Vox Mute Bus
This control adjusts how sensitive the mute send circuitry on INPUT 1, 2, 3, 4, or 6 reacts. Setting the
control fully counter-clockwise will lower the sensitivity, and a higher amplitude signal will be required
at INPUT 1, 2, 3, 4, or 6 to trigger the mute send circuits. Fully clockwise will raise the sensitivity of the
mute circuits, where a lower amplitude signal will trigger a mute send. Careful calibration of this
control may be required to fully utilize the mute circuits’ capabilities.
13. Mute Send On/Off
Set to the "On" position, and audio is present at INPUT 1, a mute command will be sent to the VOX
Mute bus, thereby muting any channels set to "MUTE RCV". When set to the "Off" position, no Mute
commands will be sent.
14. Inputs 2, 3, and 4
Balanced mic or line level signals connect to the (+) (–) and (G) terminals. Refer to the chart above
"Multi Function Dipswitch" for the proper setting for mic or line level operation. If you are connecting
an unbalanced line level input, tie (short) the (G) and (–) terminals together.
15. Input 5
INPUT 5 consists of stereo summing RCA jacks. These are suitable for connection to the output of
CD/DVD players. Note: INPUT 5 has factory installed mute features, please refer to Section 17 VOX
Mute Swith and Section 18 Remote Mute for details.
16. Input Trim Controls, Channels 2, 3, and 4
This variable control adjusts the MIC sensitivity of INPUT 2, 3, and 4 allows fine-tuning of the input
gain structure to the AA120M. There is 20dB of variable gain available. This feature is PRE channel
level control.
1211
13
14
16
15

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
10
17. VOX Mute Switch For Channels 2, 3, 4, and 6
Each 3-position switch sets the VOX mute status individually for Inputs 2, 3, 4, and 6. Note: All VOX
Mute settings are over ridden when the internal Remote Mute jumpers are installed and the
contacts are connected together. Input 5 is shipped with an internal VOX Mute jumper installed and
will be muted when any channel is set to Mute Send and signal is present at the corresponding input.
SEND - Sends a (VOX) Mute command when audio is present at the input to other channels set to
(VOX) Mute RCV (Receive).
OFF - Bypasses the (VOX) Mute Send and RCV (Receive) functions.
RCV (VOX Receive) - Inputs will be Muted when other Input Channels are set to to the (VOX) Mute
Send position and audio is present at the corresponding input.
18. Zone 2 And Zone 3 Level Controls
These rotary controls will vary the signal level at the Zone 2 and Zone 3 output terminals. Fully
counter-clockwise (0) is off, fully clockwise (10) is the maximum output level. Both Zone 2 and 3 level
controls are PRE channel level controls for Inputs 1, 2, 3, 4, 5, and 6. Note: Zone 2 and 3 level
controls function identically to their corresponding inputs. See number 28 for more details.
19. Input 6 Module Slot
The Module Slot accepts optional industry standard input modules from Atlas and other vendors.
Contact Atlas Sound for a full list of module types.
20. Tape Out
Line level mono signals are available at this jack for connection to recording devices. The signal
available here is PRE tone control and low cut filter and comes from the internal mix bus.
21. Line Out
The LINE OUT connector is useful for providing unbalanced line level signal to another amplifier or
other external devices. Prior to using this feature one must understand where the internal signal pick
up point is so you can decide if it is correct for your application. We suggest you refer to the block
diagram of the AA120M to have a complete understanding of the signal flow.
Note the following conditions for LINE OUT
A. Pre Low Cut Filter
B. Post Tone Controls (meaning the settings for the Bass and Treble controls affect this signals output).
Note: Refer to "Low Cut Filter Switch for complete understanding of the LCF feature."
C. Post Amp In (meaning any signal that is inserted into the Pre AMP In jack will be present at the Line
Out).
Vox Mu teVox Mu te
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 CNO –+ +–
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 Mu te
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mu te
Chime Module
17
19 2021 18

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
11
22.Pre Out
The PRE OUT connector has Post tone control signals available to drive another power amp or
external audio devices. Use in conjunction with the AMP IN connector, an effects loop can be created
by connecting the PRE OUT jack to a device such as an equalizer then back out to the AMP IN
connector. See the connection diagram in the setup section of this manual.
23. Pwr In
The AMP IN connector is useful for converting the AA120M into a slave amp. When a line level signal
is connected to this input, the internal connection between the preamp and internal power amp is
broken. Audio signals applied to this connector are post tone control and pre master control.
24. Bridge In/Out
Certain installations have the need to combine one or more mixers together. These mixers may be in
different rooms of an install but have the need to share a page or music throughout the installation.
These terminals provide a way to send and receive balanced line level signals from the internal mix
bus of the AA120M. The "BRIDGE IN/OUT" feature is PRE Tone Controls and Low Cut Filter. The
Bridge In/Out feature allows you to send and receive a balanced signal. This is important for allowing
longer distances between the mixers. Note: This function should only be done with other Atlas Sound
mixers that have this feature. The Send and Receive signals are combined through the same
terminals. To activate this feature see Bridge Sel below.
25. Bridge Sel
The "Bridge Select (Sel)" terminals are the access point to activate the "Bridge In/Out" feature. To
activate the feature connect the two points together via an external contact closure. These two points
must be connected to send or receive any signal. By connecting the Bridge In/Out terminals of two
AA120M, a simple room combining system can be accomplished. If using a remote switch and closing
it, the "Bridge Select (Sel)" will combine the amps as one, opening the switch will separate the two
amps. Note: If combining 3 or 4 mixers together the output level will have to be adjusted before and
after Bridge Sel terminals are connected (shorted) together. We suggest utilizing the Remote Level
control when using this feature.
26. VCA
Remote location of the level control can be accomplished via the VCA control port. You can control
the overall level (Master) or just Input 5. This selection is made via Dipswitch position #2. Connect the
two leads from the optional remote volume control to these terminals. This remote level control is
POST Master and Input 5 Level Controls. Set the system's maximum levels using the amplifier level
controls and then use the remote VCA potentiometer as an attenuator from the maximum levels set.
See the VCA setup section for instructions on wiring up the potentiometer.
Vox Mu teVox Mute
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 CNO –+ +–
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 Mu te
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mute
Chime Module
22
2324 2526

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
12
27.Remote Mute (Priority Mute)
The Remote Mute feature allows you to have priority mute over Inputs 2-6. It is useful when certain
channels need to be muted from a remote location. When shorting (connecting) the Remote Mute
terminals together, (G) and (M), the internally assigned channels will be muted and will override
the VOX Mute settings. Note: Input 1 cannot be VOX or Remote Muted at anytime. Input 5 is the only
channel shipped with a factory installed Remote Mute jumper. See the PCB diagram on page 23 for
Remote Mute jumper assignments.
28. Zone 2 And Zone 3 Mute Assign (Special Internal Feature)
Each input has a mute assignment function. Inputs 2-6 can be set to receive or send a mute
command. Each input also has individual Zone 2 and 3 level controls. There may be applications that
require different mute options with Zone 2 and 3 outputs. You may want a certain input muted but not
necessarily the corresponding Zone outputs.
Internally, there are jumpers to select each input's zone outputs to be PRE or POST input mute
assignment. The AA120M Zone 2 and 3 outputs are shipped with the following assignments:
Inputs 2, 3, and 4 are POST input mute assignment.
Inputs 5 and 6 are set to be PRE input mute assignment.
Example: Input 5 will commonly have a CD player inserted into to it for background and/or MOH.
The CD’s signal is fed to the amplifier output for background music and the same signal from the CD is
routed to a telephone systems MOH input via Zone 2 or 3 output. When Input 1 receives a page you
may want the CD to be muted for the background music but not the telephone's MOH. For this to
work, the internal Zone 2 or 3 jumpers for Input 5 need to be assigned to PRE Mute. See the PCB
diagram on page 23 for pin assignments.
29. Zone 3 Out
MUSIC ON HOLD port, also known as MOH. The Zone 3 signal is taken PRE Input gain.
30. Zone 2 Out
The 8Ω1W Zone 2 output can drive an external 8Ωspeaker, and is taken PRE Input gain.
Vox Mu teVox Mu te
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 CNO –+ +–
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 Mu te
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mu te
Chime Module
2729
30

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
13
31. 24VDC Terminals
24VDC is available on these terminals and can supply current up to 250mA. This DC output is useful
for supplying DC voltage to trigger Atlas PA series attenuators.
Note: Do not short these terminals together or ground them.
32. Relay
The AA120M supplies contact points to trigger an external component. The SPDT (single pole double
throw) set of relay contacts have (C) Common, (NO) Normally Open, and a (NC) Normally Closed
contacts available on these terminals - 500mA Max. The relay can be activated via two methods,
remote contact closure or VOX mute. Refer to Dipswitch #4 "Relay Act" for relay trigger selection.
The (CC) Contact Closure setting works in conjunction with the Remote Mute feature. Refer to section
27 "REMOTE MUTE" for detailed information.
The (VOX) setting works in conjunction with a Mute Send from an assigned Input channel. Refer to
section 17 the "MUTE SWITCH" for detailed information. This feature is also known as VOX.
33. Loudspeaker Terminals
For loudspeaker connections, connect as follows or proceed to the setup section for typical wiring
diagrams.
COM - Speaker common or negative connection
8 OHM - Connect to direct coupled loudspeakers
25V - Connect to transformer coupled, 25V loudspeakers with a total load impedance of
no less than 5.2Ω
70V - Connect to transformer coupled, 70.7V loudspeakers with a total load impedance of
no less than 41.6Ω
100V - Connect to transformer coupled, 100V loudspeakers with a total load impedance of
no less than 83Ω
34. Circuit Breaker
The circuit breaker is designed to trip and shut down the AA120M "Unswitched Outlet". After correcting
the cause of the breaker tripping, reset the breaker by pushing in on the tab.
Vox MuteVox Mu te
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 CNO –++–
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 Mu te
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mute
Chime Module
31
33
3234

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
14
35. Unswitched Outlet
The 120VAC outlet is energized at all times when the AA120M power cord is connected to a live
duplex outlet. The unswitched outlet provides power for other devices (Atlas rack work light, etc.).
Keep the total power draw below 500W.
36. Power Cord
Connect the power cord to 120VAC only. Serious damage may result if accidentally connected to other
line voltages.
Vox MuteVox Mute
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 CNO –+ +
–
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
10
010
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 Mute
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mute
Chime Module
36
35

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
15
QUICK START EXAMPLES
Example 1 - System Paging, BGM, and MOH with Emergency Page Override
When a page signal is received from INPUT 2 and the RMT MUTE terminals are shorted, the page will be
the only audio heard in the main system because BGM will be muted. If an emergency page comes into
INPUT 1, all inputs will be muted except for the emergency page. Note: Zone 3 MOH output will not be
muted or affected by either page scenario.
• Connect a paging mic to INPUT 1. This will be the priority emergency page over ride mic input.
Note: The INPUT 1 Trim and Sens will need to be adjusted after all the settings and connections
have been set.
• Connect a paging mic with a switch to INPUT 2.
• Connect the switch wires from the mic connected to INPUT 2 to the "RMT MUTE" terminals. Note:
The polarity on the switch to the terminals does not matter.
• Set Dipswitch 9 and 10 to the "MIC" position.
• Set INPUT 1 to Mute Send.
• Set INPUT 2 to Mute RCV.
• Connect a BGM player to INPUT 5. Note: The input gain of this channel may need to be changed for
proper level balance. Dipswitch 6 allows you to select between a 100mV or 300mV input sensitivity.
• Connect Zone 3 output to the MOH input on your telephone system. Adjust Input 5's Zone 3 output
level as needed.
Dipswitch Settings
Dipswitch 1 - OFF Dipswitch 2 - OFF (Not affected)
Dipswitch 3 - Depends on mic type Dipswitch 4 - OFF (Not affected)
Dipswitch 5 - OFF (Not affected) Dipswitch 6 - Set to the required gain
Dipswitch 7 - OFF Dipswitch 8 - OFF
Dipswitch 9 - ON (Mic) Dipswitch 10 - ON (Mic)
Example 1
Vox Mu teVox Mute
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 CNO –+ +–
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 Mu te
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mute
Chime Module
To 70V Speakers
Background
Music Noise
To Music on
Hold Port
From Input 2
Paging Mic Switch
Emergency
Paging Mic
Front Desk
Paging Mic
To Remote
Mute Terminals

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
16
Example 2 - Priority Attenuator Override Application with Message Repeater and BGM
This application makes use of the internal relay and 24VDC in conjunction with Atlas Sound optional "PA"
override volume controls. A typical scenario would be for a Fire Station, where the background music
is turned down by the wall volume controls in the evening. A page is received on INPUT 1 and the VOX
mute triggers the AA120M relay sending 24VDC to the attenuator engaging the internal override relay and
allowing the page to come through alerting the sleeping firemen. A message repeater is connected for
caller on hold playback. Note: Remote BGM level control can also be accomplished via the VCA control
for INPUT 5.
• Connect a mic to INPUT 1. Note: The INPUT 1 Trim and Sens will need to be adjusted after all the
settings and connections have been set.
• Set Dipswitch 10 to the "MIC" position.
• Set INPUT 1 to Mute Send.
• Connect the telephone message repeater to INPUT 2.
• Set INPUT 2 to Mute OFF. Turn down INPUT 2 volume control so no audio will be present at the
speaker terminal.
• Connect Zone 3 to the Telephone PBX MOH port. Adjust INPUT 2 Zone 3 Level as needed.
• Connect a BGM player to INPUT 5. Note: The input gain of this channel may need to be change for
proper level balance. Dipswitch 6 allows you to select between a 100mV or 300mV input sensitivity.
• Connect the external level controls to the 70V speaker output.
Dipswitch Settings
Dipswitch 1 - OFF Dipswitch 2 - OFF (Not affected)
Dipswitch 3 - Depends on mic type Dipswitch 4 - ON (VOX)
Dipswitch 5 - OFF (Not affected) Dipswitch 6 - Set to the required gain
Dipswitch 7 - OFF Dipswitch 8 - OFF
Dipswitch 9 - OFF (Line) Dipswitch 10 - ON (Depends upon source signal)
Example 2
Vox Mu teVox Mute
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 CNO –++–
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
10
010
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 Mu te
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mute
Chime Module
70V
Speakers
Emergency
Paging Source
From BGM
CD Player Message Repeater
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0/7% 2
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To PBX
MOH Port
Atlas
AT10-PA
Breaker
125V AC 4A
Push Reset 24V DC 200mA
Relay
+-
NC C NO
wiring to priority attenuators
Relay Wiring Detail
DCV

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
17
Example 3 - Optional Plug-In Module Application
The AA120M incorporates a module port that supports a variety of system options. For this example, a
plug-in chime module is used to announce a request for building entry. The chime sound would only go
to one speaker located over a security guard's area. In addition to the chime module, there is paging,
background music, and message on hold connected.
• Connect the customer's PBX page port to INPUT 1. Note: The INPUT 1 Trim and Sens will need
to be adjusted after all the settings and connections have been set.
• Set Dipswitch 10 to the "LINE" position.
• Set INPUT 1 to Mute Send.
• Connect the telephone message repeater to INPUT 2.
• Set INPUT 2 to Mute OFF. Turn down INPUT 2 volume control so no audio will be present at the
speaker terminal.
• Connect Zone 3 to the Telephone PBX MOH port. Adjust INPUT 2 Zone 3 Level as needed.
• Connect a BGM player to INPUT 5. Note: The input gain of this channel may need to be changed for
proper level balance. Dipswitch 6 allows you to select between a 100mV or 300mV input sensitivity.
• Install Chime Module to Input 6. Connect contact closure. Make sure front panel input level control is
turned down.
• Adjust INPUT 6 Zone 2 Level as needed.
• Connect the Chime Speaker to Zone 2 output terminals.
Dipswitch Settings
Dipswitch 1 - OFF Dipswitch 2 - OFF (Not affected)
Dipswitch 3 - Depends on mic type Dipswitch 4 - OFF
Dipswitch 5 - ON (Not affected) Dipswitch 6 - Set to the required gain
Dipswitch 7 - OFF Dipswitch 8 - OFF
Dipswitch 9 - OFF (Line) Dipswitch 10 - OFF (Line/Tel)
Example 3
70V Speakers
Vox MuteVox Mute
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 CNO –++–
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 Mu te
Mute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mu te
Chime Module
To Overhead 8ΩSpeaker
"Doorbell" Annunciate To PBX
MOH Port
From BGM
CD Player Message Repeater
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$4,
$4,
$4,
3+)0
3+)0
3+)0
3+)0
3+)0 3+)0
0,!9
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0!53%
0,!9 0!53% 34/0
34/0
34/0
From PBX
Page Port
To Doorbell
NO Contacts

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
18
Example 4 - Remote Level Control
Utilizing the optional plug-in modules and the Atlas Sound wall mounted VCA attenuators, we can produce
a conference room or hotel ballroom PA system with both remote Master and remote Background Music
(BGM) volume controls. Inputs 1-4 are wired to the microphone wall plates in the room and the BGM
comes from a CD player or Satellite radio receiver.
• Connect the mics to INPUTS 1-4. Note: The INPUT 1 Trim and Sens will need to be adjusted after
all the settings and connections have been set. Dipswitch 3 (Phantom power) has been turned on
for condenser type microphones.
• Dipswitches 7-10 have been set to "Mic".
• One wall mount volume control (Atlas Sound p/n AAVCC-10K) has been connected to the terminals
marked "VCA" and Dipswitch 2 is set for Master.
• Optional plug-in module, Atlas p/n AS-ML, has been inserted into the rear module slot, and the BGM
source has been plugged into the module’s line level inputs. Adjust the module’s trim control as
needed. The AS-ML is a mic or line input module with VCA capabilities.
• Another volume control (AAVCC-10K) has been wired into the VCA terminals on the MODULE. This
control will vary the BGM ONLY.
Dipswitch Settings
Dipswitch 1 - OFF Dipswitch 2 - OFF (Master)
Dipswitch 3 - ON Dipswitch 4 - OFF (CC)
Dipswitch 5 - ON (Amp Dir) Dipswitch 6 - Off (100mV)
Dipswitch 7 - ON (Mic) Dipswitch 8 - ON (Mic)
Dipswitch 9 - ON (Mic) Dipswitch 10 - ON (Mic)
Example 4
To 70V Speakers
Vox Mu teVox Mu te
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 CNO –+ +–
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 Mu te
VoxMute
Send
Off
Rcv
CLASS 2 WIRING
Vox Mu te
Chime Module
Background
Music Source
Atlas AAVC-10K
"Master Volume"
Atlas AS-ML
Module
See Module
Instructions
for VCA Wiring
Connections Atlas AAVC-10K
"Master Volume"
Microphones

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
19
Example 5 - Hotel Room Combining Using Two AA120Ms
This example utilizes the combining feature of the Atlas AA120M mixer amplifiers. The drawing on the
following page shows the equipment connections for two hotel ballrooms, separated by a moveable air
wall. They hotel needs to be able to have the audio system operate has one large unit (air wall open)
or two discreet systems (air wall closed). As indicated in the example, a BGM CD player is shared
between the two AA120Ms, via a "Y" cable, connected to input 5 of each mixer amp. The Bridge terminals
of both amplifiers are connected together, through a DPST switch that makes (combines) or breaks
(separates) the Bridge connections between the amplifiers. When the switch is closed, any audio signal
into either amp will be present at both amplifier's speaker outputs. A volume control and DPST switch
(see drawing for clarity) controls the room audio level and turns the music on or off in each room. For
emergency evacuation purposes, a signal from the hotel's fire alarm system is connected to channel 1
of both amplifiers, with both channel's mute sensitivity adjusted as needed. To mute all audio when the
emergency signal is present, all other channels are set for Mute receive.
• Set Input 1 to Mute Send
• Set Input 2-4 to Mute RCV
Dipswitch Settings
Dipswitch 1 - Off Dipswitch 2 - Off (Master)
Dipswitch 3 - Off Dipswitch 4 - Off (Not Affected)
Dipswitch 5 - Off (Not Affected) Dipswitch 6 - Set to required gain
Dipswitch 7 - On (Mic) Dipswitch 8 - On (Mic)
Dipswitch 9 - On (Mic) Dipswitch 10 - Off (Tel/Line)

Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: [phone] • FAX: [phone]
©2006 ATLAS SOUND LP Printed in U.S.A. 00106 ATS002179 RevA 01/06 PP
OWNER'S MANUAL
AA120M MIXER AMPLIFIER
20
6
6
4
LEVEL
LEVEL
0
1
2
3
10
10
9
8
7
5
6
4
LEVEL
0
1
2
3
10
9
8
7
5
power
power
power
PLAY
PLAY/PAUSE OPEN/CLOSE STOP
SINGLE
CD-RW PLAYBACK
CD-RW PLAYBACK
ON
ON
OFF
OFF
Room Combine
Switch
Music On/Off Room A
Music On/Off Room A
Remote Volume Room A
Remote Volume Room A
REC PLAY PLAYSTOP
EJECT
BGM Source
Tape Record Ballroom "A"
70.7VSpeakersBallroom"A"
Ballroom "A" Microphones
AUTOMATICTAPESELECT SYSTEM
QUICK REVERSE
ON
ON
OFF
OFF
Ballroom "B" Microphones
70.7VSpeakers Ballroom"B"
AUTOMATICTAPESELECT SYSTEM
QUICK REVERSE
REC
REC
PLAY PLAYSTOP
EJECT
Tape Record Ballroom "A" From Ennunciator Panel
Unswitched
120V AC 60Hz
Max 500W
Breaker
125V AC 4A
Push Reset
120V AC 60Hz 300W
100V70V25V
8 Ohm
Com
24V DC 200mA
Relay
+-
NC CNO -+ +
-
Zone2Out
1W 8 Ohm
Zone3Out
600 Ohm 1V
GM
Rmt Mute Vca
+
-
G
Sel
Bridge
In/Out
Input 6
Level
Zone3
Level
Zone2
100100
Sens
Input 4
Trim
Input 3
Trim
Input 2
Trim
Input 1
Trim
Input 5
Zone3Zone2
Mute
10
10
010
10
010
10
010
10
010
10
010
10
010
10
0
Bypass
Send Rcv Send
Bypass
Rcv Send
Off
Rcv
Zone2
Level
10
00
10
Zone3
Level
Zone2
Level
10
00
10 010
Zone3
Level
Zone2
Level
Zone3
Level
10
0
Zone2
Level
10
0
Zone3
Level
10
0
Input 3 Input 2 Input 1
Pwr In Tape O ut
R
Line Out
L
Input 5
Pre Out
Input 6
Bypass
Rcv
Send +-
GG
-++-
GG -+
Input 4
OFF
ON
12345678910
Send Off
Unswitched
120V AC 60Hz
Max 500W
Breaker
125V AC 4A
Push Reset
120V AC 60Hz 300W
100V70V25V
8 Ohm
Com
24V DC 200mA
Relay
+-
NC CNO -++
-
Zone2Out
1W 8 Ohm
Zone3Out
600 Ohm1V
GM
Rmt Mute Vca
+
-
G
Sel
Bridge
In/Out
Input 6
Level
Zone3
Level
Zone2
100100
Sens
Input 4
Trim
Input 3
Trim
Input 2
Trim
Input 1
Trim
Input 5
Zone3Zone2
Mute
100100100100100100100
Bypass
Send Rcv Send
Bypass
Rcv
Off
Rcv
Zone2
Level
10
00
10
Zone3
Level
Zone2
Level
10
00
10 010
Zone3
Level
Zone2
Level
Zone3
Level
10
0
Zone2
Level
10
0
Zone3
Level
10
0
Input 3 Input 2 Input 1
Pwr In Tape O ut
R
Line Out
L
Input 5
Pre Out
Input 6
Bypass
Rcv
Send +-
GG
-++-
GG -+
Input 4
OFF
ON
12345678910
Send
Vox Mute
Vox MuteVox Mute
Send
Vox Mute
Off
ON
OFF
Music On/Off Room A Remote Volume Room A
Vox Mute
Vox Mute
Vox Mute
Vox MuteVox Mute
Send
Vox Mute
Example 5 - Hotel Room Combining Using Two AA120Ms