Owner’s Manual
PA40G Front Silkscreen Artwork
PA60G Front Silkscreen Artwork
Commercial Amplifiers
PA40G / PA60G
Commercial Amplifiers
PA40G / PA60G
Power Limit Signal
Power Limit Signal
Level
Level
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PA40G / PA60G
Commercial Amplifiers
Owner’s Manual
Table of Contents
Important Safety Instructions .................................................................................................................. 3
Introduction ............................................................................................................................................ 5
Key Features .......................................................................................................................................... 5
Applications ............................................................................................................................................ 5
Front Panel Description ........................................................................................................................... 6
Rear Panel Description ............................................................................................................................ 7
Wiring the PA40G / PA60G ...................................................................................................................... 7
Optional Level Control Security Cover .................................................................................................... 8
Optional Rack Mount Kit ......................................................................................................................... 8
Limit LED & Load Considerations ........................................................................................................... 8
Specifications ........................................................................................................................................ 10
Warranty ................................................................................................................................................ 12
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
AtlasSound.com – 2 –
Owner’s Manual
PA40G / PA60G
Commercial Amplifiers
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 apparatus 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 apparatus (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 apparatus.
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 apparatus. When a cart is
used use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus 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 apparatus, the apparatus 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 apparatus should not be exposed to rain or moisture and objects filled
with liquids, such as vases, should not be placed on this apparatus.
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.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
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Specifications are subject to change without notice.
PA40G / PA60G
Commercial Amplifiers
Owner’s Manual
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.
• 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 power rating on the product when connecting equipment. Fire and/or property damage may result.
• 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 in 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 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.
WARNING
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 install this product 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 unit at least 31⁄2" away from objects that may obstruct air flow to prevent the unit's internal temperature rise.
When The Product 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 period, unplug the power cord from the wall.
CAUTION
CAUTION
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
AtlasSound.com – 4 –
Owner’s Manual
PA40G / PA60G
Commercial Amplifiers
Introduction
Congratulations and thank you for purchasing the Atlas Sound PA40G/PA60G commercial amplifier. This new and innovative
professional grade product has been designed from the ground up to include the important features that professional installation
personnel require to meet or exceed their customer’s expectations. Small and compact, and engineered for reliability, the Atlas Sound
PA40G/PA60G will provide years of service and flexibility in today’s background music and paging applications.
Key Features
• PA40G - 40W into 70.7V/100V
• PA60G - 60W into 70.7V/100V
• 1 Balanced Line Input
• 1 Unbalanced, Summing Line Level Input
• Global Power Supply, 100VAC-240VAC ~ 50/60Hz
• Optional Level Control Security Cover
• Optional Rack Mount Kit
Applications
The Atlas Sound PA40G and PA60G are the perfect choice for distributed business paging, background music (BGM) systems, and
small to medium speech privacy systems.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
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Specifications are subject to change without notice.
PA40G / PA60G
PA60G Front Silkscreen Artwork
Commercial Amplifiers
Owner’s Manual
Front Panel
Power Limit Signal
Level
41 2 3
1. Power Indicator
This LED illuminates when the AC Mains is plugged in.
2. Limit Indicator
The LIMIT LED will illuminate when the PA40G/PA60G 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. Check that the proper signal level is being fed into the inputs and/or turn the
input gain down until the LED is no longer illuminated. Refer to Limit LED & Load Conditions for more information.
3. Signal Indicator
When the signal LED illuminates, this indicates that input signals connected to the amplifier are capable of driving the PA40G/PA60G to
full power.
4. Input 1 Gain
Input 1 level control potentiometer varies the amplitude of the signal fed into the amplifier. Turn clockwise to increase and
counter-clockwise to decrease the signal level.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
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Owner’s Manual
Power Limit Signal
Level
PA60G Front Silkscreen Artwork
Rear Panel
1601 Jack McKay Blvd
Ennis, TX 75119
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800.876.3333
Balanced Input
Left In
Right In
PA40G / PA60G
Commercial Amplifiers
60 Watts
70.7V/100V
Speaker Out
Summed Inputs
100V - 240V 50Hz/60Hz 1A
41 2 3
1. Balanced Line Input
Balanced line level signals connect to the (+), (–), and (G) terminals. If you are connecting an unbalanced line level input, tie (short)
the (G) and (–) terminals together. If transformer isolation is required for Input 1, contact Atlas Sound for details. Note: The Balanced
Line Input and the Unbalanced RCA Inputs are electrically isolated from each other and can be used at the same time.
2. Unbalanced Stereo RCA Input
Input 2 consists of stereo summing inputs, suitable for connection to the output of CD/DVD players, etc. Note: The Balanced Line
Input and the Unbalanced RCA Inputs are electrically isolated from each other and can be used at the same time.
3. 70.7V / 100V Speaker Output
For loudspeaker connections, follow the labeling paying special attention to the polarity or proceed to the Limit LED & Load
Considerations section. Note: Do not short the terminals together or damage may occur. It is recommended to use class 3 rated,
16-gauge wire or higher for speaker wiring.
4. Global IEC AC Mains Power Receptacle
The PA Models support global power sources from 100V-240V 50/60Hz. The package contains a cord that has an international IED
connector to a 120V USA type plug. It may be necessary to replace the removable power cord to meet your AC Mains plug type used
in your country. Note: It is not required to change the fuse for the different AC Mains voltages.
Wiring the PA40G / PA60G
Speaker Outputs - Use 2 conductor unshielded wire of the appropriate gauge. If you are unsure about this, contact Atlas Sound Tech
Support at 1-800-876-3333. Make sure you know how many speakers you need and what tap value you intend to use.
It is recommended to use class 3 rated, 16-gauge wire or higher for speaker wiring.
Balanced Line Input - 2 conductor with shield for low level signals of 20 - 22-gauge is best. Maintain the proper polarity, + to +, – to – ,
and shield to ground.
Unbalanced Input - Pre-made RCA cables can be purchased from vendors to simplify interconnection to external devices.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
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Specifications are subject to change without notice.
PA40G / PA60G
Front Panel Knob Security Cover
or
Commercial Amplifiers
Owner’s Manual
Security Cover Option
In order to prevent unauthorized operation of the PA40G & PA60G, optional security covers are available which take the place of the
front panel knobs. After the PA amplifier has been installed and is operating as desired, grasp the front panel knobs and pull straight out
from the front panel. Replace the knobs with security covers, Atlas Sound part number MPVCC-5, available in quantities of 5.
or
Front Panel Knob Security Cover
Rack Mount Kit Options
The PA40G & PA60G can be rack mounted as a single unit or with two units together. To do so a PA702RMK Rack Mount Kit needs to
be purchased from Atlas Sound.
Limit LED and Load Consideration
If the Red Limit LED illuminates, the amplifier has sensed an improper load or the input signal is too high, triggering the protection
circuitry. When the load sense Limit circuitry is engaged the amp will operate but at a lower power output. It is highly recommended to
discontinue use immediately and correct the fault condition. If you continue to operate with the RED Limit LED on, the second stage of
the current sense circuit may engage causing the amp not to pass any signal. To reset the amp turn down the Level controls and turn
the power off for 10 seconds.
In most situations when the Limit LED is in the illuminated steady state it means the speaker system load to the amp is lower than
what the amp is rated. This usually is detected when the system is first set up. Below are a few load conditions to check for if the
Limit LED is on.
1. Connected to the wrong speaker terminal. Always check the speaker terminal to the type of load you are using. Example: If
you are installing a 70V or 100V system make sure the wires are connected to the 70V/100V and common (COM) terminals.
2. Too many speakers connected to the amp. This is a very common mistake. If you are using a 60W amp and using the 70V
speaker terminals, add up the number of speakers and their wattage selections at the speaker. If they exceed 60W you must
retap the speakers or remove the correct amount speaker wattage until the wattage is 60W or less. Example: If you are using
a 30W tap you can only connect 2 speakers to the amp. If you are using the 7.5W tap, you can connect 8 speakers. If you
have too many speakers on the amp it will load the amp down, causing excessive current demand and will trigger the Limit &
Protect circuit.
3. Wrong speaker tap selection. It is also common in a 70V or 100V system that one of the speakers are set too low of an
impedance (8 ohm) and not a 70V or 100V tap. Note: It only takes one speaker to load the amp down incorrectly.
4. Short in system. This is common if the wire is run in metal conduit and the wire got nicked during the wire pull.
5. Speaker Level Controls. If an L-pad or stepped attenuator is wired wrong it can also load a system down.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
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Owner’s Manual
Measuring Speaker Loads
Below is an Impedance load chart for the PA40G and PA60G. Measure the load impedance prior to connecting the load to the
amplifier. The enclosed load chart will provide the information to determine if the load or speaker system impedance is too low for the
amplifier’s rating. In every install it is always recommended to measure the load prior to turning the system on to be sure the system is
installed correctly.
PA40G / PA60G
Commercial Amplifiers
PA40G & PA60G Max Load Chart
Speaker Selection PA40G PA60G
70.7V 125 Ohms 83 Ohms
100V 250 Ohms 166 Ohms
Measuring a Speaker System’s Impedance
Note: It is important to only use an Audio Impedance Meter and not a conventional Volt/Ohm meter. A true audio frequency impedance
meter is essential for reliable installation of background music and paging systems in residences, office buildings and public areas.
Avoid costly service calls and amplifier damage by verifying actual speaker system impedance prior to operation. Unlike conventional
volt/ohm meters, which measure DC resistance, an Audio Impedance Meter unit utilizes an internal frequency oscillator to measure
true impedance. It may also be utilized with 70.7V and 100V speaker line transformers, L-pads and matching impedance volume
controls. There are several Audio Impedance meters on the market, if you need to buy one we suggest going to MCM Electronics,
Parts Express or search the internet for “Audio Impedance Meter”.
Measuring 70.7V or 100V Distributed Speaker Systems
Large distributed systems typically utilize 70.7V (North America) or 100V (Europe) type system to greatly ease the connection of
multiple speakers and facilitate long cable runs. Shown below are speakers connected in parallel with wattage ratings to calculate
the overall load of the system. Connecting an Audio Impedance Meter to a speaker arrangement such as this will provide the overall
impedance of the system.
Using the following formula you can calculate the load impedance from the speaker selected wattage. The accumulative wattage of
the speaker system must not exceed the maximum wattage output rating of the amplifier or damage may occur. In this example the
measurement for a 70.7V design with three speakers of 15W each. The system impedance would measure close to 111Ω. Formula
70.7V x 70.7V = 4998, 4998 / 45W = 111Ω. The amplifier power requirements would be at least 60W for the system to operate
properly. Note: It is always recommended to use a larger amp than needed with power headroom of at least 25%. Calculate the load
impedance and compare it to the meter’s audio impedance reading. Note: They will never be the same due to the additional wire
impedance, but if they are within 10% of the maximum impedance rating or if the impedance is higher than the maximum rating,
proceed connecting the load to the amplifier. If they are not recheck your speaker taps or check for shorts.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
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Specifications are subject to change without notice.
PA40G / PA60G
Commercial Amplifiers
Owner’s Manual
Specifications
Type Commercial Amplifier
Safety Listings TUV UL60065 Standard, CE, Class 3 Rated
Electrical Specifications
Power Output PA40G: 40W @ 70.7V (125Ω), 40W @100V (250Ω)
PA60G: 60W @ 70.7V (83Ω), 60W @ 100V (166Ω)
Front Panel
Indicators Power, Limit, Signal
Controls Input 1 Gain
Technical Data
Frequency Response 50Hz - 20kHz
Thd+N .5% or Less @ 1kHz, Rated Output
Sensitivity Line Input 500mv (600Ω)
Inputs 2 / 3 RCA 500mv (10kΩ)
Output Regulation Less Than 2dB, No Load To Full Load
Signal To Noise Ratio Balanced Input = >55dB
Unbalanced RCA Summed = >55dB
Power Requirements
Power Consumption PA40G: Idle: 0.075A, 8W, 27 BTU
Average: 0.26A, 24W, 81 BTU
Max: 0.8A, 71W, 242 BTU
PA60G: Idle: 0.075A, 8W, 27 BTU
Average: 0.41A, 34W, 116 BTU
Max: 1.25A, 102W, 348 BTU
Fuse PA40G: T630mA
PA60G: T1A
Mechanical
Dimensions 8.5" x 1.75" x 7.81" (216mm x 45mm x 198mm)
Weight PA40G: Net Weight = 2.9lbs. (1.32kg), Shipping Weight = 3.1lbs. (1.4kg)
PA60G: Net Weight = 2.9lbs. (1.32kg), Shipping Weight = 3.1lbs. (1.4kg)
Note: Average power consumption is based on one third (1/3) of the maximum power rating, 50% duty cycle.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
AtlasSound.com – 10 –
Owner’s Manual
Notes:
PA40G / PA60G
Commercial Amplifiers
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800.876.3333 • Fax: 800.765.3435
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Specifications are subject to change without notice.
PA40G / PA60G
Commercial Amplifiers
Owner’s Manual
Limited Warranty
All products manufactured by Atlas Sound are warranted to the original dealer/installer, industrial or commercial purchaser to be free
from defects in material and workmanship and to be in compliance with our published specifications, if any. This warranty shall extend
from the date of purchase for a period of three years on all Atlas Sound products, including SOUNDOLIER brand, and ATLAS SOUND
brand products except as follows: one year on electronics and control systems; one year on replacement parts; and one year on
Musician Series stands and related accessories. Additionally, fuses and lamps carry no warranty. Atlas Sound will solely at its discretion,
replace at no charge or repair free of charge defective parts or products when the product has been applied and used in accordance
with our published operation and installation instructions. We will not be responsible for defects caused by improper storage, misuse
(including failure to provide reasonable and necessary maintenance), accident, abnormal atmospheres, water immersion, lightning
discharge, or malfunctions when products have been modified or operated in excess of rated power, altered, serviced or installed
in other than a workman like manner. The original sales invoice should be retained as evidence of purchase under the terms of this
warranty. All warranty returns must comply with our returns policy set forth below. When products returned to Atlas Sound do not
qualify for repair or replacement under our warranty, repairs may be performed at prevailing costs for material and labor unless there is
included with the returned product(s) a written request for an estimate of repair costs before any nonwarranty work is performed. In
the event of replacement or upon completion of repairs, return shipment will be made with the transportation charges collect.
EXCEPT TO THE EXTENT THAT APPLICABLE LAW PREVENTS THE LIMITATION OF CONSEQUENTIAL DAMAGES FOR PERSONAL
INJURY, ATLAS SOUND SHALL NOT BE LIABLE IN TORT OR CONTRACT FOR ANY DIRECT, CONSEQUENTIAL OR INCIDENTAL
LOSS OR DAMAGE ARISING OUT OF THE INSTALLATION, USE OR INABILITY TO USE THE PRODUCTS. THE ABOVE WARRANTY IS
IN LIEU OF ALL OTHER WARRANTIES INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE.
Atlas Sound does not assume, or does it authorize any other person to assume or extend on its behalf, any other warranty, obligation,
or liability. This warranty gives you specific legal rights and you may have other rights which vary from state to state.
Service
Should your PA Series amplifier require service, please contact the Atlas Sound warranty department at
1-877-689-8055, ext. 277 or support.atlassound.com to obtain an RA number.
Atlas Sound Tech Support can be reached at 1-800-876-3333 or support.atlassound.com.
Visit our website at www.AtlasSound.com to see other Atlas products.
©2015 Atlas Sound L.P. All rights reserved. Atlas Sound is a trademark of Atlas Sound L.P.
All other trademarks are the property of their respective owners. ATS003582 RevE 2/15
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