Atlas IED AA240, AA240G Users Manual
Owner’s Manual AA240 Mixer Amplifier
AA240 Atlas Sound Mixer Amplifier
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
– 1 – AtlasSound.com
Specifications are subject to change without notice.
Owner’s ManualAA240 Mixer Amplifier
Table of Contents
Table of Contents ................................................................................................................................................................ 2
Important Safety Instructions ............................................................................................................................................ 3
Introduction, Features, and Applications ......................................................................................................................... 6
Front Panel Description ..................................................................................................................................................... 7
Rear Panel Description .................................................................................................................................................8–11
Quick Start Examples ................................................................................................................................................. 12–14
Wiring the AA240 ............................................................................................................................................................. 15
Load Consideration and Overload LED .......................................................................................................................... 15
Measuring Speaker Loads ............................................................................................................................................... 16
Measuring 25V/70.7V Distributed Speaker Systems ..................................................................................................... 16
Security Covers Option .................................................................................................................................................... 17
Wiring the AAVCC-10K VCA Potentiometer .................................................................................................................. 17
AA240 Block Diagram ..................................................................................................................................................... 18
Optional Input Transformer Installation ......................................................................................................................... 19
Specifications .................................................................................................................................................................. 20
Notes ............................................................................................................................................................................21-23
Warranty ............................................................................................................................................................................ 24
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
AtlasSound.com – 2 –
Specifications are subject to change without notice.
Owner’s Manual AA240 Mixer Amplifier
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION
RISQUE DE DECHARGE ELECTRIQUE
-NE PAS OUVRIR.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION
´
Important Safety Instructions
The lightning flash with arrowhead symbol within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage “ within the
product’s enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the product.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this device near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other devices (including amplifiers) that produce
heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the
other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your
safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they
exit from the device.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the device. When a cart is used
use caution when moving the cart/device combination to avoid injury from tip-over.
13. Unplug this device during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the device has been damaged in any way, such as
power-supply cord or plug is damaged, liquid has been spilled, or objects have fallen into the device, the device has been exposed
to rain or moisture, does not operate normally, or has been dropped.
15. WARNING: To reduce the risk of fire or electric shock, this device should not be exposed to rain or moisture and objects filled with
liquids, such as a vase, should not be placed on this device.
16. To completely disconnect this equipment from the mains, disconnect the power supply cord plug from the receptacle.
17. The mains plug of the power supply cord shall remain readily operable.
– 3 – AtlasSound.com
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
Specifications are subject to change without notice.
Owner’s ManualAA240 Mixer Amplifier
Amplifier Clearance Requirements
31/2" (88.9mm)
3
1
/2" (88.9mm)31/2" (88.9mm)
10
0
10
0
0 10
On
Off
Input 6
Input 5
Input 4
Input 3
Input 2
10
0
10
0
10
+
–
0
Bass
Treble
0
10
+
–
Input 1
Master
Power
PowerLimitPeakSignal
CAUTION – When Installing the Product
• Plugging in or unplugging the power cord with wet hands may result in electric shock.
• Never move the device 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 install this device in humid or dusty locations, nor in direct sunlight, near sources of heat, or in areas where sooty smoke or
steam are present. Fire and electric shock may result.
• Keep all sides of the device at least 31⁄2" away from objects that may obstruct air flow to prevent the unit's internal temperature
rise.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
AtlasSound.com – 4 –
Specifications are subject to change without notice.
Owner’s Manual AA240 Mixer Amplifier
WARNING – When the Device is in Use
• To prevent electric shock, do not remove the device 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 device as this may cause fire or electric shock:
• Smoke or strange smell coming from the unit.
• If the device falls or the case is damaged.
• If water or any metallic objects falls into the device.
• If the power supply cord is damaged in any way.
• If the device is malfunctioning.
• Do not insert or drop metallic objects or flammable materials into the ventilation holes of the device'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 device.
If any liquid spills into the unit, fire or electric shock may result.
• Never operate this device 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.
• Operate the device 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 in close proximity to heaters and do not
place heavy objects on the power cord, including the device itself, doing so may result in fire or electrical shock.
• 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.
CAUTION – When the Device is in Use
• 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.
• 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 is 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 power cord
from the wall.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
– 5 – AtlasSound.com
Specifications are subject to change without notice.
Owner’s ManualAA240 Mixer Amplifier
Introduction
Congratulations and thank you for purchasing the Atlas Sound Model AA240 professional grade mixer / amplifier. An integral part of
the Strategy Series of commercial products, the AA240 was engineered and integrated with unique features to assist the contractor /
installer in today’s commercial business audio environment.
Features
• Zone 1 Output 240 Watts
• Zone 2 Output 1 Watt @ 8Ω or 1.5V @ 600Ω
• Inputs 1–5 Mic/Line Switchable
• Input 6 Line Level Only
• Input 1 has VOX Send
• Inputs 2-6 have Switch Selectable Mute Receive
• 2 Tape and 2 Line Outputs
• Remote VCA Selectable INPUT 6 or MASTER
• Switch Selectable Bridge In/Out Bus Allows Amplifier Combining
• Pre-Amp Out-Power Amp in Loop
Applications
The AA240 will be right at home in large retail, commercial, and industrial paging and background music applications. Hotels and
conference centers will appreciate the room combining and remote volume control features that this product provides.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
AtlasSound.com – 6 –
Specifications are subject to change without notice.
Owner’s Manual AA240 Mixer Amplifier
10
0
10
0
0 10
On
Off
Input 6
Input 5
Input 4
Input 3
Input 2
10
0
10
0
10
+
–
0
Bass
Treble
0
10
+
–
Input 1
Master
Power
PowerLimitPeakSignal
Front Panel Description
1. Power Switch
This push on / push off switch applies power to the AA240.
2. Power LED
This LED will illuminate blue when the AA240 is turned on.
3. Peak LED
The PEAK LED will illuminate Red when the AA240 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. Limit LED
This LED will illuminate Yellow when the amplifier is consuming excessive current. At that point, a limiting circuit is being activated,
preventing the amplifier from failure. The most likely cause for the fault is an incorrect load impedance on the output of the amplifier. The LED should never come on if a proper load is applied.
Note: An occasional LED flash is okay. When LED is ON audible distortion may be heard at the speakers.
5. 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 green. Once all the sources connected are playing, the SIGNAL LED may be on
solid. This condition is normal.
6. 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.
7. 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.
8. Bass Control
The BASS CONTROL is a shelving type control which will boost or cut bass frequencies at 100Hz at the rate of ±6dB.
9. Treble Control
The TREBLE CONTROL is a shelving type control which will boost or cut treble frequencies at 10kHz at the rate of ±6dB.
– 7 – AtlasSound.com
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
Specifications are subject to change without notice.
Rear Panel Description
On
Off
Power
PowerLimitPeakSignal
Off
On
Off
On
Off
On
Off
On
Input 2
On
Off
Off
On
Mute Rcv
Input 6
Input 5
Input 4
Input 3
51
2 3
4
Low Cut
6
0 10
On
Off
Master
Power
PowerLimitPeakSignal
Input 2
Trim
Input 3
Trim
Input 6
Off
On
Off
On
Off
On
Off
On
Input 2
On
Off
Line
Mic
Line
Mic
Line
Mic
Sens
Input 1
Input 2Input 3
Input 4Input 5 Phantom
On
Off
Input 6
1
2 3
4
5
300mV
100mV
6
7
Master
Line
Mic
Mic
Tel/Line
Off
On
Mute Rcv
Input 6
Input 5
Input 4
Input 3
VCA
51
2 3
4
8
Low Cut
6
Input 1
Sens
Input 1
Trim
VCA
In/Out
Bridge
Sel
Zone 2 Out
Ω
1W 8Ω600
Remote
Mute
Input 2
Tri m
Input 3
Tri m
Input 5
Input 6
OffOnOff
On
Off
On
Off
On
Input 2
On
Off
Line
Mic
Line
Mic
Line
Mic
Sens
Input 1
Input 2Input 3
Input 4Input 5 Phantom
On
Off
Input 6
1
2 3
4
5
300mV
100mV
6
7
Master
Line
Mic
Mic
Tel/Line
Off
On
Mute Rcv
Input 6
Input 5
Input 4
Input 3
VCA
51
2 3
4
8
Low Cut
6
Input 1
Sens
Input 1
Tri m
Input 4
Tri m
Input 5
Trim
Zone 2
Level
B
A
Line Out
Speaker Output 240W
Ω
100V70V25V4Com
+ +
G
+
R
L
Pre Out
Pwr In
Tape Out
Input 6
Input 4 Input 3 Input 2 Input 1
Unswitched Outlet
120V
~ 60Hz
Max 500W
Outlet Breaker
125V
~ 4A
Push Reset
G
+
G
+
G
+
G
+
+
G
120V AC 60Hz 700W
1601 Jack McKay Blvd., Ennis, TX 75119
(800) 876-3333 AtlasSound.com
CLASS 2 WIRING
10. Dipswitch “A” Positions 1–6
Understanding the functionality of the dipswitches is key to getting the most out of the AA240. Whether the 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 all levels be
turned down prior to making any switch selections. Pay close attention to the two assignment charts 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 on. We
suggest that when paging horns are connected to the AA240, engage the
LOW CUT filter to prevent the horns from operating below their cut off frequency.
When “OFF”, the amplifier operates full bandwidth.
Dipswitch 2–6 - MUTE RCV (RECEIVE)
11. Dipswitch “B” Positions 1–8
Dipswitch 1
Dipswitch 2–5
Dipswitch 6
Dipswitch 7
Note: The Phantom Power when activated is present for both Line and Mic modes. In some Line source input application the
Dipswitch 8
AtlasSound.com – 8 –
When “ON”, Input's 2–6 signals will be muted upon a signal present on Input 1 (Refer to Number 11 Input 1 Sens), or a contact
closure on the remote mute terminals (Refer to Number 16 Remote Mute).
When set to the “100mV” position, the sensitivity of Input 6 is
suitable for inputting Telephone Paging Signals. When set to the
“300mV” position, the sensitivity of Input 6 is suitable for CD/DVD
player outputs.
When set to the “Line” position, input sensitivity is suitable for CD/DVD line level inputs.
When set to the “Mic” position, sensitivity is suitable for microphone inputs.
When set the “Tel/Line” position, Input 1 sensitivity is suitable for telephone paging and line level signals.
When set to the “Mic” position, the sensitivity is set for microphone signals.
When set to the “OFF” position, PHANTOM POWER is turned off on INPUTS 1–5.
When set to the “ON” position, PHANTOM POWER (24VDC) is available on INPUTS 1–5.
Phantom Power may cause popping. This can be corrected by adding a 10uf – 100uf / 50V electrolytic capacitor in series with
the input. Contact Atlas for an application note.
When set to the “Master” position, the VCA control port acts as an overall system remote volume control, adjusting all the input
channels present on the master section mix bus up or down simultaneously. When set to the “Input 6” position, the VCA remote
control port affects only the level of INPUT 6.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
Specifications are subject to change without notice.
Owner’s ManualAA240 Mixer Amplifier
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