Easy PA Series User manual

PA PUBLIC ANNOUNCEMENT
AMPLIFIER
User’s Manual
Contact Information
[email protected]
https://singeasy.com

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IMPORTANT SAFETY INFORMATION
WARNING FOR YOUR PROTECTION
READ THE FOLLOWING:
KEEP THESE INSTRUCTIONS
HEED ALL WARNINGS
FOLLOW ALL INSTRUCTIONS
The apparatus shall not be exposed to dripping or splashing liquid and
no object filled with liquid, such as vases, shall be placed on the
apparatus.
CLEAN ONLY WITH A DRY CLOTH.
DO NOT BLOCK ANY OF THE VENTILATION OPENINGS. INSTALL
IN ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS.
DO NOT INSTALL NEAR ANY HEAT SOURCES SUCH AS
RADIATORS, HEAT
REGISTERS, STOVES, OR OTHER
APPARATUS (INCLUDING AMPLIFIERS) THAT PRODUCE HEAT.
ONLY USE ATTACHMENTS/ACCESSORIES SPECIFIED BY THE
MANUFACTURER.
UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR
WHEN UNUSED FOR LONG PERIODS OF TIME.
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 third prong are provided for your safety. If the provided
plug does not fit your outlet, consult an electrician for replacement of
the obsolete outlet.
Protect the power cord from being walked on or pinched particularly at
plugs, convenience receptacles, and the point where they exit from the
apparatus.
Use only with the cart stand, tripod bracket, or table specified by the
manufacture,
or sold with the apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid injury from tip-over.
The symbols shown above are internationally
accepted symbols that warn of potential hazards
with electrical products. The lightning flash with
arrowpoint in an equilateral triangle means that
there are dangerous voltages present within the
unit. The exclamation point in an equilateral
triangle indicates that it is necessary for the user
to refer to the owner’s manual.
These symbols warn that there are no user
serviceable parts inside the unit. Do not open the
unit. Do not attempt to service the unit yourself.
Refer all servicing to qualified personnel.
Opening the chassis for any reason will void the
manufacturer’s warranty. Do not get the unit wet.
If liquid is spilled on the unit, shut it off
immediately and take it to a dealer for service.
Disconne
ct the unit during storms to prevent
damage.
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.
POWER ON/OFF SWITCH: If the equipment has a Power switch, the
Power switch used in this piece of equipment DOES NOT break the
connection from the mains.
MAINS DISCONNECT: The plug shall remain readily operable. For
rackmount or installation where plug is not accessible, an all-pole mains
switch with a contact separation of at least 3 mm in each pole shall be
incorporated into the electrical installation of the rack or building.
FOR UNITS EQUIPPED WITH EXTERNALLY ACCESSIBLE FUSE
RECEPTACLE:
Replace fuse with same type and rating only.
MULTIPLE-INPUT VOLTAGE: This equipment may require the use of
a different line cord, attachment plug, or both, depending on the
available power source at installation. Connect this equipment only to
the power source indicated on the equipment rear panel. To reduce the
risk of fire or electric shock, refer servicing to qualified service
personnel or equivalent.
If connected to 240V supply, a suitable CSA/UL certified power cord
shall be used for this supply.

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IMPORTANT SAFETY INFORMATION
SAFETY INSTRUCTIONS
NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED
WITH A POWER CORD.
WARNING: THIS APPLIANCE SHALL BE CONNECTED TO A
MAINS SOCKET OUTLET WITH A PROTECTIVE EARTHING
CONNECTION.
The cores in the mains lead are coloured in accordance with the
following code:
GREEN and YELLOW - Earth BLUE - Neutral BROWN – Live
As colours of the cores in the mains lead of this appliance may
not
correspond with the coloured markings identifying the
terminals in your plug, proceed as follows:
The core which is coloured green and yellow must be
connected to the terminal in the plug marked with the letter
E, or with the earth symbol, or coloured green, or green
and yellow.
The core which is coloured blue must be connected to the
terminal marked N or coloured black.
The core which is coloured brown must be connected to
the terminal marked L or coloured red.
This equipment may require the use of a different line cord,
attachment plug, or both, depending on the available power
source at installation. If the attachment plug needs to be
changed, refer servicing to qualified service personnel who
should refer to the table below. The green/yellow wire shall be
connected directly to the units chassis.
CONDUCTOR WIRE COLOR
Normal Alt
L LIVE BROWN BLACK
N NEUTRAL BLUE WHITE
E EARTH GND GREEN/YELLOW GREEN
WARNING: If the ground is defeated, certain fault conditions in
the unit or in the system to which it is connected can result in
full line voltage between chassis and earth ground. Severe
injury or death can then result if the chassis and earth ground
are touched simultaneously
If you want to dispose this product, do not
mix it with general household waste.
There is a separate collection system for
used electronic products in accordance
with legislation that requires proper
treatment, recovery and recycling
Private
household in the 25 member states of the EU, in
Switzerland and Norway many return their used electronic
products free of charge to designated collection facilities or to a
retailer (if you purchase a similar new one).
For countries not mentioned above, please contact your local
authorities for a correct method of disposal. By doing so you will
ensure that your disposed product undergoes the necessary
treatment, recovery and recycling and thus prevent potential
negative effects on the environment and human health.

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Table of Contents
Table of Contents
Section 1 - Welcome
1.1 Welcome .................................................................................................................................. 5
1.2 Contact Info ............................................................................................................................. 5
Section 2 - Features
2.1 Front Panel Features ............................................................................................................... 6
2.2 Back Panel Features ............................................................................................................... 7
2.3 Protection Features ................................................................................................................. 8
Section 3 - Setup
3.1 Get Started .............................................................................................................................. 9
3.2 Stereo Mode .......................................................................................................................... 10
3.3 Connect to AC Mains ............................................................................................................ 11
3.4 Protecting Your Speaker ....................................................................................................... 11
3.5 Startup Procedure ................................................................................................................. 11
3.6 LCD Screen ........................................................................................................................... 12
3.7 Precautions ........................................................................................................................... 13
Section 4 - F.A.Q.
4.1 F.A.Q. ..................................................................................................................................... 14
Section 5 - Appendix
5.1 Specifications ........................................................................................................................ 15

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Section 1
Welcome
1.1 Welcome
Congratulations on your purchase of the Sing Easy PA Series. The PA Series is a a 2U mixer public
announcement amplifier gives your entertainment or PA system a boost! Provides convenient 3
microphone inputs, 2 AUX inputs and speaker control with 100V, 70V, 16 ohm, 8 ohm, and 4 ohm
speaker outputs, supporting speakers with 4 to 16 ohm impedance. The PA Series amplifier brings
more than just basic functionality, reliability and great value to the range for a variety of commercial
and industrial installations. Volume control over MIC1 to MIC3, AUX1 and AUX2, master & overall
treble/bass controls are provided.
Features
2U aluminium oxide black brushed panel
Two analog auxiliary inputs
Three microphone inputs
Master volume and independent input channel volume control
Independently adjustable treble and bass
Microphone override attenuation
Five-unit LED level display
100V, 70V, 4Ω, 8Ω, and 16Ωcompatibility
Double-sided SMT circuit
Package Contents
Sing Easy PA Public Announcement Amplifier
Owner’s Manual
Power Cable
Infrared Remote Controller
How to Use This Manual
This manual provides you with the necessary information to safely and correctly setup and operate
your amplifier. It does not cover every aspect of installation, setup or operation that might occur under
every condition. For additional information, please contact technical support, your system installer or
retailer.
We strongly recommend you read all instructions, warnings and cautions contained in this manual.
Also, for your protection, please save your bill of sale — it’s your official proof of purchase.
1.2 Contact Info
On the World Wide Web:
www.singeasy.com
Professional Contacts, Outside the US:
Contact the Sing Easy Distributor in your area. A complete list of Sing Easy international distributors
is provided on our website @ www.singeasy.com

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Section 2
Features
2.1 Front Panel Features

Power Switch & Power LED
Amplifier is on when the switch is in the UP position.

Master Level Control
Rotate to adjust the master volume.

Five-Unit LED Level Display

Bass and Treble EQ
Rotate to adjust the bass and treble.

MIC 1, 2 and 3 Level Control
Rotate to adjust the mic volume.

AUX 1 and 2 Level Control
Rotate to adjust the AUX volume.

MIC 1 Input








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Section 2
Features
2.4 Back Panel Features

Microphone Override Priority Level Adjustment Knob
When MIC 1 is activated, MIC 2, MIC 3, AUX1 and AUX2 signals will be attenuated by 0 to
30 dB according to the mute adjustment.

MIC 1 and 2 Inputs

Analog AUX1 and AUX2 Inputs

PRE-Output

Output Terminal
Independent 100V, 70V and 4Ω to 16Ω output terminals
Connect to the bare wire from your speakers to one of the output terminal types.
Note: Do not use more than one type of output terminal, either use 100V or 70V or 4Ω to
16Ω, the COM is the common ground for 100V, 70V and 4Ω to 16Ω output.

IEC Power Connector & Fuse Holder

Cooling Vents








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Section 2
Features
2.3 Protection Features
PA Series amplifiers provides extensive protection including output current limiting, thermal protection,
and circuit breaker.
1. Output Current Limiting
Output Current Limiting circuitry protects the amplifier output stage for damage caused by short-
circuit loads
2. Thermal Protection
The Thermal Protection circuit will activate if the internal heatsink temperature exceeds proper
operating temperatures (85 °C or 185 °F).
When the heatsink temperature has fallen to a safe level (75°C to 80°C or 167°F to 176°F), this
protection circuit will automatically be reset. Principle causes of thermal protection are:
1) Inadequate ventilation of the equipment rack
2) Incorrect load impedance
3) Output cable short circuit
4) Blocked air vent
5) Heatsinks in need of cleaning
6) Cooling fan failure.
The cause of your amplifier’s thermal protection state should be determined and corrected as
soon as possible. Without correction, the Thermal Protection circuit will typically reactivate.
3. Fuse Protection
The high-voltage power supplies of your Sing Easy amplifier are protected by a fuse.

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Section 3
Setup
3.1 Get Started
Choose Output Wire and Connectors
Sing Easy recommends using professionally wired, high quality, two-conductor, heavy gauge speaker
wire and connectors.
You may connect the bare wire from your speaker to the output terminal to prevent the possibility of
short-circuits, wrap or otherwise insulate exposed loudspeaker cable connectors.
Using the guidelines below, select the appropriate size of wire based on the distance from amplifier
to speaker.
Distance Wire Size
up to 7.5m or 25 ft. 16 AWG
7.6 to 12m or 26-40 ft. 14 AWG
12.2 to 18m or 41-60 ft. 12 AWG
18.1m to 30m or 61-100 ft. 10 AWG
31.1 to 45m or 101-150 ft. 8 AWG
45.1 to 76m or 151-250 ft.
6 AWG
CAUTION: Never use shielded cable for output wiring.

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Section 3
Setup
3.2 Connect the PA Series
1. Connect the speakers, microphone and music player to the PA Series,
2. Power on all audio output devices then power on the PA Series.
3. While playing back audio, slowly increase the volume of the PA Series to the desired listening
level.
4. When powering off the system, remember to first power off the PA Series to avoid speakers
clipping.

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Section 3
Setup
3.3 Connect to AC Mains
Connect the PA Series to the AC mains power source (power outlet) with the supplied AC power
cordset. First, connect the IEC end of the cordset to the IEC connector on the PA Series; then, plug
the other end of the cordset to the AC mains.
WARNING: The third prong of this connector (ground) is an important safety feature.
Do not attempt to disable this ground connection by using an adapter or other
methods.
Amplifiers don’t create energy. The AC mains voltage and current must be sufficient to deliver the
power you expect. You must operate your amplifier from an AC mains power source with not more
than a 10% variation above or a 15% variation below the amplifier’s specified line voltage and within
the specified frequency requirements (indicated on the amplifier’s back panel label). If you are unsure
of the output voltage of your AC mains, please consult your electrician.
3.4 Protecting Your Speaker
It's wise to avoid clipping the amplifier signal. Not only does clipping sound bad, but it can also damage
high frequency drivers. To prevent clipping, insert a limiter between your mixer output and amplifier
input.
That way, no matter how strong a signal your mixer produces, the amplifier will not clip. Set the limiter
threshold so that mixer signals above 0 on the mixer meters do not quite drive the amplifier into
clipping.
Also, avoid sending strong subsonic signals to the amplifier. High-level, low-frequency signals from
breath pops or dropped microphones can blow out drivers. To prevent subsonic signals, insert a high
pass filter between mixer output and amplifier input (or between mixer and limiter). Alternatively,
switch in high pass filters at your mixer. Set the filter to as high a frequency as possible that does not
affect your program. For example, try 35 Hz for music and 75 Hz for speech. On each mixer input
channel, set the filter frequency just below the lowest fundamental frequency of that channel's
instrument.
3.5 Startup Procedure
Use the following procedure when first turning on your amplifier:
1. Turn down the level of your audio source.
2. Turn down the level controls of the amplifier.
3. Turn on the “Power” switch. The Power indicator should glow.
4. Turn up the level of your audio source to an optimum level.
5. Turn up the Level controls on the amplifier until the desired loudness or power level is achieved.
6. Turn down the level of your audio source to its normal range.
If you ever need to make any wiring or installation changes, don’t forget to disconnect the power cord.

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Section 3
Setup
4.6 Precautions
Your amplifier is protected from internal and external faults, but you should still take the following
precautions for optimum performance and safety:
1. Before use, your amplifier first must be configured for proper operation, including input and output
wiring hookup. Improper wiring can result in serious operating difficulties.
2. Use care when making connections, selecting signal sources and controlling the output level.
The load you save may be your own!
3. Do not short the ground lead of an output cable to the input signal ground. This may form a ground
loop and cause oscillations.
4. WARNING: Never connect the output to a power supply, battery or power main.
Electrical shock may result.
5. Tampering with the circuitry or making unauthorized circuit changes may be hazardous and
invalidates all agency listings.
6. Do not operate the amplifier with the red Clip LEDs constantly flashing.
7. Do not overdrive the mixer, which will cause clipped signal to be sent to the amplifier. Such signals
will be reproduced with extreme accuracy, and loudspeaker damage may result.
8. Do not operate the amplifier with less than the rated load impedance. Due to the amplifier’s output
protection, such a configuration may result in premature clipping and speaker damage.
Remember: Sing Easy is not liable for damage that results from overdriving other system components.

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Section 4
F.A.Q.
4.1 F.A.Q.
Before submitting the device for repair, please check the below frequently asked questions.
FAULT REASON SOLUTION
No sound output and the
display does not light up
The power plug is not plugged
in properly
Connect the power plug
correctly and ensure good
contact
AC 220V fuse blown
Unplug the power cable,
replace the fuse with the same
specification
No sound output but display is
lighted up
The output speaker signal is
not connected properly
Check the speaker’s
connection, reconnect and
ensure good contact
Main volume set to minimum
Turn up the main volume
The unit is set to mute
Unmute
No output from the input source
Check the input source,
reconnect and ensure good
contact
Audio can only be listened on
one side
The speaker cable is not
properly connected
Check the speaker cables
connection and ensure good
contact
Of one the input signal cable is
wrongly inserted or loosen
Check the input cables then
reconnect and ensure good
contact
Damaged signal cable
Replace the damaged signal
cable, reconnect, and make
sure good contact
Note: If the fault can’t be resolved, please send the equipment to a nearby dealer for troubleshooting.

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Section 5
Appendix
5.1 Specifications
PA350
PA500
PA650
Rated Output
350W
500W
650W
Speaker Outputs 4 to 16 ohm, 70V and 100V
Frequency Response 60 Hz - 15k Hz (± 3 dB)
Total Harmonic Distortion
<0.5% at 1kHz, 1/3 of the rated output power
Signal to Noise Ratio Line: 85dB / MIC: >72 dB
Mic Inputs MIC1, MIC2 and MIC3: 600 ohm 10-15 mV, unbalanced
AUX Inputs AUX1 and AUX2: 10k ohm 200-470 mV, unbalanced
Tone Adjustment Range Bass: 100 Hz (± 10 dB) and Treble: 12k Hz (± 10 dB)
Power Protection
8A AC fuse, short circuit and over temperature
Power Requirements AC 220V ± 10% 50-60Hz
Power Consumption 485W 675W 875W
Net weight 14Kg 16.5Kg 17.5Kg
Dimensions (W x H x D) 483 × 89 × 366 mm
Note: The design and specifications are subject to change without notice for improvement.