OMNITRONIC PAA Series PA Mixing Amplifier User Manual

OMNITRONIC PAA Series PA Mixing Amplifier

Product Information

The PAA 120 I 240 I 360 PA Amplifier is a mono-mixing amplifier with a power range of 120-360 watts. It is specifically designed for use in 100 V PA systems. This amplifier can be used with PA speakers that have 70 V and 100 V audio transformers or with speakers that have an impedance of 4-16 ohms. The amplifier features XLR and 6.3 mm jack inputs for connecting audio units with line level, such as a preamp. It also has a feedthrough output. The amplifier and the connected speakers are protected by extensive
protective circuits.

Product Usage Instructions

Introduction:

Welcome to Omnitronic! Thank you for choosing the PAA 120 I 240 I 360 PA Amplifier. Before using the amplifier, please carefully read all the warnings in the user manual and on the unit to ensure your safety and the safety of others.  This user manual will show you how to install and operate the PA amplifier. Users of this product are recommended to carefully read all warnings in this manual and on the unit in order to protect themselves and others from damage.
This user manual is valid for item numbers: 80709807, 80709809, and 80709811.

Please save this document for future needs and pass it on to further owners.

Safety Instructions:

• Keep the amplifier away from rain and moisture.
• Be cautious when operating the amplifier as it carries dangerous voltage that can cause electric shock.
• Using speaker systems with the amplifier at excessive sound pressure levels may lead to permanent hearing loss.

Installation:

To connect the amplifier, follow these steps:

1. Connect the speakers to the amplifier’s output terminals. Make sure to connect the positive speaker cable to the corresponding terminal (marked with a plus symbol) and the negative speaker cable to the corresponding terminal.
2. If using multiple speakers, make sure to configure them correctly based on the desired impedance (parallel or series connection).
3. Connect audio units with line level (e.g. preamp) to the XLR or 6.3 mm jack inputs of the amplifier.
4. If needed, use the feedthrough output for connecting additional devices.
5. Ensure all connections are secure.

Operation:

The amplifier features various protection circuits to ensure safe operation. If you encounter any problems, refer to the problem-solving section in the user manual for possible causes and solutions.

Cleaning and Maintenance:

Regularly clean the amplifier using a soft, dry cloth. Do not use any liquids or abrasive materials for cleaning. If the fuse needs to be replaced, follow the instructions provided in the user manual.

Technical Specifications:

• Weight:
  • PAA-120: 8.4 kg
  • PAA-240: 9.6 kg
  • PAA-360: 14.7 kg
• Power:
  • PAA-120: 240 W
  • PAA-240: 480 W
  • PAA-360: 720 W
• Power Output (RMS):
  • PAA-120: 120 W
  • PAA-240: 240 W
  • PAA-360: 360 W
• Impedance: 70 V, 100 V, 4-16 ohms
• Input Connectors: XLR, 6.3 mm jack
• Frequency Response: 60 Hz – 16 kHz
• Total Harmonic Distortion: 0.5% at 1 kHz
• Signal-to-Noise Ratio: 90 dB
• Amplifier Class: Class AB
• Indicator Lights: Power, Fault, Clip, Level (0 to -15 dB)

Environmental Protection:

For information on the proper disposal of the amplifier, refer to the user manual.

Safety Instructions

• CAUTION! Keep this device away from rain and moisture!
• CAUTION! Be careful with your operations. With a dangerous voltage you can suffer a dangerous electric shock when touching the wires!
• HEALTH HAZARD! By operating speaker systems with an amplifier, you can produce excessive sound pressure levels that may lead to permanent hearing loss.

This PA system has left our premises in absolutely perfect condition. In order to maintain this condition and to ensure a safe operation, it is absolutely necessary for the user to follow the safety instructions and warning notes written in this user manual.
Damages caused by the disregard of this user manual are not subject to warranty. The dealer will not accept liability for any resulting defects or problems.

Unpacking

Please make sure that there are no obvious transport damages. Should you notice any damages, do not take the device into operation and immediately consult your local dealer.
Save the package and all packing materials. In the event that a fixture must be returned to the factory, it is important that the fixture be returned in the original factory box and packing.

Protection Class

• This device falls under protection class I. The power plug must only be plugged into a protection class I outlet. The voltage and frequency must exactly be the same as stated on the device. Wrong voltages or power outlets can lead to the destruction of the device and to mortal electrical shock.

Power Cord

• Always plug in the power plug at least. The power plug must always be inserted without force. Make sure that the plug is tightly connected with the outlet.
• Never let the power cord come into contact with other cables! Handle the power cord and all connections with the mains with particular caution! Never touch them with wet hands, as this could lead to mortal electrical shock.
• Never modify, bend, strain mechanically, put pressure on, pull, or heat up the power cord. Never operate next to sources of heat or cold. Disregard can lead to power cord damages, fire or mortal electrical shock.
• The cable insert or the female part of the device must never be strained. There must always be sufficient cable to the device. Otherwise, the cable may be damaged which may lead to mortal damage.
• Make sure that the power cord is never crimped or damaged by sharp edges. Check the device and the power cord from time to time.                                                                                                                                                                                                                                        The occupation of the connection cables is as follows:
  Cable| Pin| International
  ---|---|---
  Brown| Live| L
  Blue| Neutral| N
  Yellow/Green| Earth|

The earth has to be connected! If the device will be directly connected to the local power supply network, a disconnection switch with a minimum opening of 3 mm at every pole has to be included in the permanent electrical installation. The device must only be connected with an electric installation carried out in compliance with the IEC standards. The electric installation must be equipped with a Residual Current Device.

Liquids

• There must never enter any liquid into power outlets, extension cords, or any holes in the housing of the device. If you suppose that also a minimal amount of liquid may have entered the device, it must immediately be disconnected. This is also valid, if the device was exposed to high humidity. Also if the device is still running, the device must be checked by a specialist if the liquid has reduced any insulation. Reduced insulation can cause mortal electrical shock.

Foreign Objects

• There must never be any objects entering into the device. This is especially valid for metal parts. If any metal parts like staples or coarse metal chips enter into the device, the device must be taken out of operation and disconnected immediately.
  Malfunctions or short circuits caused by metal parts may cause mortal injuries.

Ambient Conditions

• The ambient temperature must always be between – 5° C and +45° C. Keep away from direct insulation (particularly in cars) and heaters. The relative humidity must not exceed 50 % with an ambient temperature of 45° C.
• This device must only be operated in an altitude between -20 and 2000 m over NN.
• Never use the device during thunderstorms. Overvoltage could destroy the device. Always disconnect the device during thunderstorms.
• This device must never be operated or stockpiled in surroundings where splash water, rain, moisture or fog may harm the device. Moisture or very high humidity can reduce the insulation and lead to mortal electrical shocks.
• When using smoke machines, make sure that the device is never exposed to the direct smoke jet and is installed in a distance of 0.5 meters between smoke machine and device.

Installation

• Do not shake the device. Avoid brute force when installing or operating the device. When choosing the installation spot, please make sure that the device is not exposed to extreme heat, moisture or dust. There should not be any cables lying around. You endanger your own and the safety of others!
• Never install the amplifier next to highly sensitive devices like pre-amplifiers or tape decks, as the strong magnetic field of the amplifier can produce hum in these devices. The magnetic field is strongest directly above or below the amplifier. If a rack is used, the amplifier should be installed at the bottom and the highly sensitive devices at the top.

Commercial Use

Operating an amplification system in public or industrial areas, a series of safety instructions have to be followed. The operator must therefore inform himself on the current safety instructions and consider them.

Setup

• Operate the device only after having familiarized with its functions. Do not permit operation by persons not qualified for operating the device. Most damages are the result of unprofessional operation!
• Before the unit is switched on all faders and volume controls have to be set to zero or minimum position. Turn the amplifier on last and off first! Only connect the device when the power switch is off. Never connect output to output. Never connect the inputs or outputs to any power source (batteries, etc.)

Cleaning and Service

• Disconnect from mains before cleaning! Never use solvents or aggressive detergents in order to clean the device! Rather use a soft and damp cloth.
• There are no serviceable parts inside the device except for the fuse. Maintenance and service operations are only to be carried out by authorized dealers! Should you need any spare parts, please use genuine parts.

Modifications and Guarantee

• Never remove the serial barcode from the device as this would make the guarantee void.
• Please consider that unauthorized modifications on the speaker system are forbidden due to safety reasons!
• If this device will be operated in any way different to the one described in this manual, the product may suffer damages and the guarantee becomes void. Furthermore, any other operation may lead to dangers like short-circuit, burns, electric shock, etc.

Maximum Power

The given maximum power of the speaker system describes short-term peaks the system can handle as a maximum. The correspondent RMS power is -as of all comparable systems (also from other manufacturers) – significantly lower. The maximum power of the speaker system must never be exceeded. When operating the speaker system, please make sure that the loudspeakers always sound well. When distortions can be heard, either the amplifier or the loudspeaker is overloaded. Overloads can quickly lead to amplifier or speaker damage. In order to avoid damage, please reduce the volume immediately when distortions can be heard. When speaker systems are destroyed by overload, the guarantee becomes void.

Batteries

Do not try to short-circuit, recharge, disassemble or heat batteries (danger of explosion!). Remove the batteries if the device is not used for a longer period of time. Damaged/leaking batteries may cause harm to your skin–use safety gloves.

Intended Use
The PA mono mixing amplifiers of the PAA series have been specially designed for the use in 100 V PA systems.

 Operating Elements and Connections

•  Fault: protective circuit is active

•  Clip: overload

•  -15/-10/-6/-3/0: level indication for the output signal

4| Air vents| The amplifiers use a forced-air cooling system, allowing high continuous power levels without thermal problems.

mains. Only use fuses of the same rating and power. The correct fuse value is specified on the rear panel.
6| Mains cable| For connection to a mains socket.
7| Screw connectors| For 70 / 100 V speakers or 4 / 8 / 16 Ω speakers. Use COM as common ground connection for all speakers.
8| INPUT jacks| Input (optionally XLR or 6.3 mm jack) for the balanced connection to units with line level.
9| LINK feed-through outputs| Output (optionally XLR or 6.3 mm jack) for connection of a further amplifier.

Installation

This amplifier is built for 19″ racks (483 mm) but can also be used as a tabletop unit. In order to ensure sufficient cooling of the amplifier, air must always be able to flow freely through all air vents. For rack installation, the amplifier requires 2 U. If several units are to be installed, make sure that you leave 1 unit space between the devices. Insert the heaviest units into the lower part of the rack. The hot air given off by the amplifier must be dissipated from the rack; otherwise, heat will accumulate in the rack which may not only damage the amplifier but also other units in the rack. In case of insufficient heat dissipation, install a ventilation unit into the rack.

Connections

DANGER TO LIFE
High voltage at terminals when using PA systems. Installation by skilled personnel only! Turn off amplifier before connecting.

Speakers
Either PA speakers with 70 V or 100 V audio transformer or 4-16 Ω speakers or speaker groups with a total impedance of at least 16 Ω can be connected.

• Connect PA speakers to the terminals “COM” (negative pole) and “100 V” or “70 V”.
• Connect low-impedance speakers to the terminals “COM” (negative pole) and “4Ω”, “8Ω” or “16 Ω” (positive pole).
• When connecting, observe the correct polarity (positive and negative connections). The terminal “COM” is always the negative pole. The positive connection of the speaker cables is always specially marked.

The total load must not exceed 120 WRMS (PAA-120), 240 WRMS (PAA-240) or 360 WRMS (PAA-360), otherwise the amplifier may be damaged by overload.

Notes
The input impedance of the speaker systems should at least be the same or even higher than the output impedance of the amplifier. Refer to this example for the calculation number of speakers/impedance.

Choosing appropriate speaker cables

• Speaker systems must only be connected via sufficiently dimensioned cables. Thin cables lead to cable heatup or enormous power loss and loss in sound quality. For all speaker systems up to 400 Watts, we recommend a cable diameter of 2.5 mm², for all other speaker cables 4 mm².
• A high damping factor of your amplifier supplies a clear sound reproduction. Unnecessarily long and thin cables will influence the damping factor and thus the low frequencies in a negative way. In order to safeguard good sound quality, the damping factor should lie around 50. The longer a cable has to be, the thicker it should be. In this respect, a damping factor of 200 will be reduced to 47 (8 ohms) when using a 10 m long, 2.5 mm² speaker cable. The power loss at 8 ohms is 1.63 %, at 4 ohms 3.25 % and at 2 ohms even 6.5 %.The maximum cable length is 30 meters.

General information on installing cables

• Always treat cables carefully and protect them from damages during transportation.
• Install cables always in a structured way and protect them from damage.
• Cables must be installed in a way that no person can stumble over them. Always fix cables with an appropriate tape.
• Cables should be installed directly (no loops, S-shaped overlengths).
• Always install cables far away from power cables (never closely parallel).
• Never put heavy objects like speaker systems, flightcases etc. on cables.
• Never operate cables wound up.

Units with line level
Connect the output of a preamplifier or mixer to the XLR or 6.3 mm jack INPUT. Both jacks are provided for balanced signals. The input signal should have line level.

Note
Input cables should be short and direct, since high frequencies will mostly be absorbed if the cables are unnecessarily long. Besides that a longer cable may lead to humming and noise trouble. If long cable runs are unavoidable, you should use balanced cables.

Feed-through output
For parallel connection of a further PA amplifier, the feed-through output LINK can be used via the XLR or 6.3 mm jack. Connect the output LINK to the input of the second PA amplifier.

Connection with the mains
Finally connect the device to the mains with the mains cable.

Operation

1. To prevent loud switching noise, always switch on all other units of the amplifier system before switching on the power amplifier. After operation, switch off the power amplifier first.
2. Prior to switching on set the level control to zero. Then switch on the amplifier with the power switch. The “Power” indicator lights up.
3. Adjust the level control to the desired volume value. The 5-step LED row shows the output level. In case of overload, the red LED “Clip” lights up. In this case, reduce the volume correspondingly.

Notes
When operating the amplifying system, please make sure that the loudspeakers always sound well. When distortions can be heard, either the amplifier or the loudspeaker is overloaded. Overloads can quickly lead to amplifier or speaker damage. In order to avoid damage, please reduce the volume immediately when distortions can be heard. When speaker systems are destroyed by overload, the guarantee becomes void. Always check the sound pressure level with a meter in order to keep to the threshold.

Protective circuits
The protective circuits prevent damage to the speakers and the amplifier. If activated, the speakers are electrically separated from the amplifier and the LED FAULT lights up:

• for a few seconds after switching-on until the speaker outputs are ready for operation
• in case of overheating of the amplifier
• in case of a short-circuit at a speaker output
• in case of a DC voltage at a speaker output

If the red LED FAULT lights up during operation or if it does not extinguish after switching on, the amplifier has to be switched off and the cause of the fault has to be removed.

and any extension cables.
No sound.| ·    The power cord of the respective device is not connected properly or not connected at all or is defective.

·    The connection socket or the plug is dirty.

| ·    Check the power cord and if the plugs are tightly connected with the sockets.

·    Clean the socket and/or the plug.

Fan does not work, LEDs do not light up.| ·    The power cord is not connected.| ·    Please check if the power is available
LED       Fault       lights       up permanently.| ·    Inputs receive DC voltage.

·    Amplifier is overheated due to impurities or heat accumulation.

·    Impedance of speakers too low.

·    Short-circuit in speaker connection or in speakers.

·    Technical default of amplifier.

| ·    Switch amplifier off and have the device checked by a service- technician.

·    Clean the fan grille.

·    Provide for sufficient air circulation.

·    Connect other speakers.

·    Check speakers.

·    Switch amplifier off and have the device checked by a service technician.

Cleaning and Maintenance

• We recommend a frequent cleaning of the device. Please use a soft lint-free and moistened cloth. Never use alcohol or solvents!
• There are no serviceable parts inside the device except for the fuse. Maintenance and service operations are only to be carried out by authorized dealers. Should you need any spare parts, please use genuine parts. If the power supply cable of this device becomes damaged, it has to be replaced by a special power supply cable available at your dealer. Should you have further questions, please contact your dealer.
• Replacing the fuse
• If the fine-wire fuse of the device fuses, only replace the fuse by a fuse of same type and rating. Before replacing the fuse, unplug mains lead.

Procedure:

• Step 1: Open the fuse holder on the rear panel with a fitting screwdriver.
• Step 2: Remove the old fuse from the fuse holder.
• Step 3: Install the new fuse in the fuse holder.
• Step 4: Replace the fuse holder in the housing.

19″ dimensions with 2 U

| 483 x 385 x 92 mm

19″ dimensions with 2 U

| 483 x 385 x 92 mm

19″ dimensions with 2 U

Weight:| 8.4 kg| 9.6 kg| 14.7 kg

Specifications are subject to change without notice due to product improvements.

Protecting the Environment

Disposal of old equipment

When to be definitively put out of operation, take the product to a local recycling plant for disposal which is not harmful to the environment. Devices marked with this symbol must not be disposed of as household waste. Contact your retailer or local authorities for more information. Remove any inserted batteries and dispose of them separately from the product.
You as the end user are required by law (Battery Ordinance) to return all used batteries/rechargeable batteries. Disposing of them in household waste is prohibited. You may return your used batteries free of charge to collection points in your municipality anywhere where batteries/ rechargeable batteries are sold. By disposing of used devices and batteries correctly, you contribute to the protection of the environment.

• For product updates, documentation, software and support please visit www.omnitronic.de. You can find the latest version of this user manual in the product’s download section.
  © 2022 OMNITRONIC. All rights reserved.

• No part of this document may be reproduced in any form without the written permission of the copyright owner. The contents of this document are subject to revision without notice due to continued progress in methodology, design, and manufacturing.

• All trademarks mentioned herein are the property of their respective owners.

• D00140923, version 1.0, publ. 11/07/2022

www.omnitronic.de

References

• Omnitronic: Ihr Hersteller und Großhändler für Audioequipment

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