OMNITRONIC DJP-900P MK2 PA Amplifier User Manual

: June 5, 2024
: OMNITRONIC

Table of Contents

Introduction
Safety Instructions
Operating Elements and Connections
Setup
Cleaning and Maintenance
Protecting the Environment
Technical Specifications
References
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OMNITRONIC DJP-900P MK2 PA Amplifier

 **User Manual**

DJP-900P MK2 STEREO AMPLIFIER

Stereo mixing amplifier with audio player and Bluetooth

The compact stereo mixing amplifier DJP-900P with efficient class D output circuitry is particularly suitable for permanent installations in restaurants, gyms and retail locations which require quick-access music playback control. It provides 2 x 460 watts at 4 ohms and makes mixing of a stereo line source and a microphone easy. For double output power it is possible to switch to bridge mode. Then 900 watts are provided. Low-impedance speakers and PA speakers with 100 V audio transformers can be connected. Stream your music wirelessly from your smartphone, tablet or computer via Bluetooth to the built-in audio player, which also offers slots for USB storage devices and SD(HC) memory cards. Extensive protective circuits provide protection e.g. against short circuit, overload and overheating. 100V PA installation must be made by skilled personnel only.

Overview of all features

Compact stereo mixing amplifier 2 x 460 watts
For quick-access music playback control in restaurants, fitness studios and retail locations
Built-in audio player with Bluetooth receiver
Stream music wirelessly from your mobile devices (e.g. smartphone, tablet) via Bluetooth
USB 2.0 input and SD card slot
Efficient class D circuitry
Extremely low weight and height due to integrated switch mode power supply
2 operating modes can be selected (stereo or bridge/100V)
Speaker switch-on delay and auto limiters
5 stereo line inputs
4 RCA L/R connectors on the back panel and 3.5 mm connector on the front panel
1 mono microphone input with volume control on the front panel
Audio source selector
Controls for volume, bass and treble
Stereo record output RCA L/R
Extensive protective circuits
PA outputs for low-impedance and 100 V speakers
Robust steel chassis with aluminum front panel
483 mm rack installation possible with supplied mounting brackets

Introduction

Welcome to Omnitronic! Thank you for choosing one of our products. This user manual will show you how to install and operate the amplifier. Users of this product are recommended to carefully read all warnings in this manual and on the unit in order to protect yourself and others from damage.

This user manual is valid for item number: 10451607. Please save this document for future needs and pass it on to further owners.

www.omnitronic.de

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.

Safety Instructions

This device 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 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 in 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:

The earth has to be connected! If the device will be directly connected with 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. Malfunction 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. Over voltage 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.

Intended Use

The stereo mixing amplifier is suitable for general professional PA applications and was designed for indoor use only.

Operating Elements and Connections

Front Panel

Rear Panel

Setup

Setting up the amplifier

Set up the amplifier on an even, solid surface. In order to ensure sufficient cooling, air must always be able to flow freely through all air vents. Steady overheating will damage the amplifier.

Making the connections

Four audio units with line level (e.g. CD player, tuner, mixer) can be connected to the stereo RCA jacks LINE INPUT 1 to 4. Always connect the left channel to the white jack and the right channel to the red jack.
An additional audio unit with line level can be connected to the 3.5 mm jack on the front panel (e.g. MP3 player, smartphone notebook). The audio player will be muted when this jack is connected.
Use the MIC IN jack to connect a dynamic microphone via an XLR or 6.3 mm jack plug.
In stereo mode, the amplifier can operate two speakers or two speaker groups. The amplifier is able to deliver 2 x 460 watts for 4 Ω speakers and 2 x 240 watts for 8 Ω speakers. Use the red terminals (positive contact) and black terminals (negative contact) for connecting the speakers.
For double output power it is possible to switch over to bridge mode and operate one speaker or one speaker group. In this case, use the two red terminals for the connection.
Always use sufficiently dimensioned cables (min. 2.5 mm²). When interconnecting several speakers, it is especially important to consider the correct connection to positive and negative contacts and that the minimum total impedance is 4 Ω for stereo and 8 Ω for bridge operation. Please refer to skilled personnel if you are not familiar with the connection of several speakers.
Alternatively, it is possible to operate one 100V PA speaker or speaker group with 260 watts. In this case, use the two red terminals for the connection.
For connection to units with line level (e.g. recording unit or additional amplifier) the stereo RCA output OUTPUT can be used.
Finally connect the amplifier to a mains outlet (230 V AC, 50 Hz ~) with the mains cable.

To prevent loud switching noise, always switch on all other units before switching on the amplifier. After operation, switch off the power amplifier first. Prior to switching on set the level controls to the left stop position.

Select the operating mode with the MODE selector switch: STR = stereo mode or BRGD = bridge mode or 100 V mode.
Then switch on the amplifier with the power switch. The blue power indicator lights up.
Use the INPUT SELECT switch to select signal source and adjust the desired volume with the LEVEL control. Adjust the sound with the LOW and HIGH controls.
Mix the microphone signal to the master signal with the MIC LEVEL control
After operation, switch off the amplifier with the power switch. The power indicator goes off.

Audio player

The built-in audio player plays titles in MP3, WMA and WAV format from USB devices and SD(HC) memory cards. Make sure the 3.5 mm jack is not connected; otherwise the audio player will be muted.

Set the INPUT SELECT switch to the AUX 5 position to assign the signal of the audio player to the master signal.
Insert a USB device into the USB port and/or a memory card into the card slot (notched corner to the left).
After loading a data carrier, it is selected as the playback medium and the playback will start automatically. The display indicates the playback source and the elapsed time of the current title in minutes and seconds.
Shortly press the [MODE] button to switch between the data carriers and Bluetooth operation.
By long actuation of the buttons [VOL‒/ ] and [VOL+/ ] you can adjust the internal volume of the audio player. There are 30 steps available (indication “U01-U30“).
To interrupt the playback, press the button [ ]. The display indicates . To start the playback again, press the button once again.
By short actuation of the buttons [VOL‒/ ] and [VOL+/ ] you can skip titles in forward or backward direction.
To remove a USB device, disconnect it from the USB port. To eject a memory card, slightly press it into the slot until it comes out and can be removed. Prior to removing a device, always terminate the playback with the [ ] button. Otherwise damage or loss of data may occur.

Setting up a Bluetooth connection with mobile devices

The audio player features a Bluetooth receiver allowing you to stream music wirelessly from your mobile devices such as smartphones, tablets and notebooks.

Press the [ MODE ] button (repeatedly) until the display indicates “ bLUE “ and a beep sounds. The audio player will enter the pairing mode.
Activate the Bluetooth function at the Bluetooth source. The DJP-900P is indicated by “ BLUETOOTH “ on the display of the Bluetooth source. Pair the devices with each other.
Now play music at the Bluetooth source as you normally would and the sound will come out of the amplifier.
The Bluetooth source may also be operated via the audio player. To interrupt or continue the playback, press the button [ ].With the buttons [ ] and [ ] you can skip titles in forward or backward direction.

Protective circuits

The integrated protective circuits prevent damage to the speakers and the amplifier. To prevent distortions in case overload, the integrated level limiter reduces the input signal if the limit level is reached at the output. If one of the other protective circuits is activated, the speakers are electrically separated from the amplifier:

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 overload of the amplifier
in case of DC voltage at a speaker output
in case of a short-circuit at a speaker output

If the speakers are switched off during operation or if they are not ready for operation after switching on, the amplifier has to be switched off and the cause of the fault has to be removed.

Cleaning and Maintenance

DANGER TO LIFE! Disconnect from mains before starting maintenance operation! Please use a soft lint-free and moistened cloth. Never use alcohol or solvents!
There are no serviceable parts inside the device. 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.

Protecting the Environment

Disposal of old equipment

When to be definitively put out of operation, take the product to a local recycling plant for a 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 the household waste is prohibited. You may return your used batteries free of charge to collection points in your municipality and anywhere where batteries/ rechargeable batteries are sold. By disposing of used devices and batteries correctly, you contribute to the protection of the environment.