OMNITRONIC MCD 2004 MK2 4 Channel Installation Amplifier User Manual

OMNITRONIC MCD 2004 MK2 4 Channel Installation Amplifier

Product Information

The MCD PA Amplifier Series is a multi-channel PA amplifier available in three models: MCD 2004 MK2, MCD 3006 MK2, and MCD 4008 MK2. It has a steel chassis with an aluminum front plate and LED indicators for each channel’s signal level. It has a frequency range of 22-25000 Hz and a total connection value of 350 W (1/8 Power) for MCD 2004 MK2, 525 W (1/8 Power) for MCD 3006 MK2, and 700 W (1/8 Power) for MCD 4008 MK2.

Product Usage Instructions

Initial Setup

Before using the MCD PA Amplifier, please follow these instructions:

1. Read the user manual carefully to ensure proper usage and avoid damage.
2. Ensure that the device is kept away from rain and moisture.
3. Plug in the power cord into the device and connect it to a power outlet with a voltage of 230 V AC, 50 Hz.
4. Connect the input source to the device’s input jacks.
5. Connect the output of the device to the speakers.

Operation

To turn on the MCD PA Amplifier:

1. Flip the power switch located on the front panel to the “On” position.
2. The status LEDs will light up indicating that the amplifier is ready for use.

To adjust the signal level:

1. Use the level controls located on the front panel to adjust the signal level of each channel.
2. The LED indicators will display the signal level of each channel. Avoid clipping by keeping the signal level below the clip level.

To protect the amplifier:

1. The MCD PA Amplifier is equipped with protection circuits that will automatically shut down the device if a fault occurs.
2. If the device shuts down due to a fault, check the connections and eliminate the cause of the fault before turning on the device again.

Cleaning and Maintenance

Clean the MCD PA Amplifier periodically with a soft, dry cloth. Do not use abrasive cleaners or solvents that may damage the device. If you notice any problems with the device, contact a qualified technician for repairs.

INTRODUCTION

Thank you for having chosen an OMNITRONIC amplifier. If you follow the instructions given in this manual, we are sure that you will enjoy this device for a long period of time. Please keep this manual for future needs.

CAUTION!
Keep this device away from rain and moisture!

• For your own safety, please read this user manual carefully before you initially start up.
• This user manual is valid for article numbers 10452414, 10452415 and 10452416. You can find the latest update at: www.omnitronic.de.

Every person involved with the installation, operation and maintenance of this device has to

• be qualified
• follow the instructions of this manual
• consider this manual to be part of the total product
• keep this manual for the entire service life of the product
• pass this manual on to every further owner or user of the product
• download the latest version of the user manual from the Internet

SAFETY INSTRUCTIONS

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 an amplifying system, you can produce excessive sound pressure levels that may lead to permanent hearing loss.

• 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 on the connection panel or on the casing, do not take the speaker system into operation and immediately consult your local dealer.

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. Disregarding can lead to power cord damage, 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. If extension cords are used, make sure that the core diameter is sufficient for the required power consumption of the device. All warnings concerning the power cords are also valid for possible extension cords. Always disconnect from the mains, when the device is not in use or before cleaning it. Only handle the power cord by the plug. Never pull out the plug by tugging the power cord. Otherwise, the cable or plug can be damaged leading to mortal electrical shock. If the power plug or the power switch is not accessible, the device must be disconnected via the mains. If the power plug or the device is dusty, the device must be taken out of operation, disconnected and then be cleaned with a dry cloth. Dust can reduce the insulation which may lead to mortal electrical shock. More severe dirt in and at the device should only be removed by a specialist.

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.

Avoiding Hum
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.

Prior to Switching on
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.)

Children and Amateurs
Keep away, children and amateurs!

Maintenance and Service
There are no serviceable parts inside the speaker system. Maintenance and service operations are only to be carried out by authorized dealers!

OPERATING DETERMINATIONS

The multichannel PA amplifiers of the MCD series have been specially designed for stage and disco applications. The amplifiers have four (MCD-2004), six (MCD-3006) or eight (MCD-4008) separate channels. The amplifiers and the speakers connected are protected through extensive protective circuits.

Power Supply
This product must only be connected to a power source matching the voltage and frequency stated on the device. 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 (RCD) with a maximum fault current of 30 mA.

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!

Ambient Conditions
This product was designed for indoor use only. 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. 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. The ambient contamination must never exceed level 1 and must not be conducting, only dry. Never use the device during thunderstorms. Overvoltage could destroy the device. Always disconnect the device during thunderstorms.

Transport
Please use the original packaging if the device is to be transported.

Cleaning
Never use solvents or aggressive detergents in order to clean the device! Rather use a soft and damp cloth.

Operation
Operate the device only after having been familiarized with its functions. Do not permit operation by persons not qualified for operating the device. Most damages are the result of unprofessional operation!

Serial Barcode
Never remove the serial barcode from the device as this would make the guarantee void.

Modifications and Guarantee
Please note that damages caused by manual modifications on the device or unauthorized operation by unqualified persons are not subject to warranty. 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.

Avoiding Hearing Loss
By operating amplifying systems, you can produce excessive sound pressure levels that may lead to permanent hearing loss. Please refer to the explanations under “Legal instructions”.

Public and Industrial Use
Operating an amplification system in public or industrial areas, a series of safety instructions have to be followed that this manual can only give in part. The operator must therefore inform himself on the current safety instructions and consider them.

WEEE Directive
If the unit is to be put out of operation definitively, take it to a local recycling plant for disposal which is not harmful to the environment. Do not dispose of as municipal waste. Contact your retailer or local authorities for more information.

Legal Instructions

Operating an amplification system can produce extremely high noise levels that may cause permanent hearing loss. The legal instructions for using an amplification system vary from country to country. The user must always inform himself on the legal instructions valid in his country and apply them to his situation. Always monitor the sound pressure level when operating an amplification system in discotheques, concerts etc. Never exceed the permissible noise level exposures as specified by your authorities. The monitoring of the noise levels must be documented in an appropriate way. In Germany, the following instructions are binding: Strafgesetzbuch § 223 ff: bundesrecht.juris.de/bundesrecht/stgb TA Lärm: www.umweltdaten.de DIN 15905-5: www.din.de Arbeitsstättenverordnung § 15: www.lgl.bayern.de/arbeitsschutz Berufsgenossenschaftliche Vorschrift BGV B3: www.pro.info VDI-Richtlinie: VDI 2058 Blatt 2: www.vdi.de Hearing damage caused by high noise levels can be treated as physical injury and persecuted by law. Please note that the organizer is responsible for keeping to a specified noise level. If this noise level will be exceeded, the event may be canceled immediately. If the organizer does not fulfill his safety duties, he is reliable by civil law for any damages occurred, e.g.: Pay the treatment costs of the damaged person. Pay smart money to the damaged person. Economic damage caused can be demanded from the operator of the amplification system. If hired persons work with amplification systems: the noise levels of music events are almost always too high. This is why the entrepreneur has to set up warning signs and provide hearing protectors. The staff has to use these.

OMNITRONIC cannot be made liable for damages caused by incorrect installations and excessive noise levels!

Information on Hearing Loss

More and more young people suffer from hearing loss of 25 decibels or more, mainly caused by loud music from portable MP3 and CD players or discotheques. Everybody operating amplification systems should know to what sound pressure levels he exposes his or her audience’s hearing. As an average levels between 75 and 105 dB(A) in the discotheque or 95 and 115 dB(A) at a rock concert are reached. Individual peaks can exceed the pain level at 130 dB(A). Such levels are typical for motor chainsaws or jackhammers. It is important to know that doubling the power increases the noise level by 3 dB. Human hearing does only recognize a doubling of the sound level when the noise level is increased by 10 dB. Damaging hearing does not depend on the sound level but on the noise level and starts way before the pain level. Many people deceive themselves by thinking that noise is something they can get accustomed to. It is possible that a positive opinion of a certain noise can reduce the physiological reaction, but the slow impacts on inner hearing must not be neglected: overstimulation and continuous elimination of the Cortic organ’s hair cells. The reason why some people have got accustomed to a certain noise level and are no longer disturbed is that they have already suffered hearing damage. This damage makes them insensitive to those frequencies forming the loudest part of the noise. Getting accustomed to noise does not mean anything other than trying to get along with hearing loss in everyday life. The hearing loss itself cannot be healed; it can only be compensated by hearing aids. Subjectively, the hearing loss feels like dampened ears. This effect weakens with time, but a loss in hearing sensitivity often remains. In order to relax the hearing sufficiently, the noise level should not exceed 70 dB(A) for 10 hours. Higher noise levels during this relaxing period can prevent the relaxation and promote permanent hearing damage (Tinnitus) or hearing loss. Therefore: Whoever wants to maintain his hearing should use hearing protectors!

Overview on the Different Noise Levels

OPERATING ELEMENTS & CONNECTIONS

Front Panel

Rear Panel

SETUP

Rack Installation

This amplifier is built for 19″ racks (483 mm). This rack use should be a double-door rack where front panel and rear panel can be opened. The rack should be provided with a cooling fan. When mounting the amplifier into the rack, please make sure that there is enough space around the device so that the heated air can be passed on. Steady overheating will damage your device. You can fix the amplifier with four screws M6 in the rack. If several devices are to be installed, make sure that you leave 1 unit space between the devices. Be careful when mounting the amplifier into the rack. Put the heaviest devices into the lower part of the rack. Be aware that fastening the amplifier with four screws on the front panel is not enough. In order to ensure safety, additional fastening by using ground and sidebars is necessary. If racks are to be transported or used for mobile use, additionally fasten the devices by connecting the rear brackets with the side or ground bars of the rack. Thus, the amplifier cannot be pushed backward. The front panel alone is not designed to absorb acceleration forces occurring during transportation.

Making the Connections
All connections have to be made or changed only if the amplifier is switched off!

Inputs
Connect the output of a preamplifier or mixer to the balanced XLR inputs or the first three contacts of the plug-in screw terminals. For better handling, the connection terminals can be removed from their plug-in connection. The input signal should have a line level. For the rated power of the amplifier, an input signal of 2 V is required as a minimum.

• Contact configuration of the inputs

Feed-through of the Input Signal
The input signal which is fed to the XLR jack of a channel can also be picked up from the plug-in screw terminals of the same channel and fed through to the input of another channel. For this connection in each case contact 1 (+Life) and 2 (-Life) of the plug-in screw terminals of both channels with each other. The Contact 3 (Shield) must not be connected externally as they are already internally connected.

Speaker Outputs
The amplifier offers four (MCD-2004), six (MCD-3006) or eight (MCD-4008) separate. For connecting speakers, plug-in screw terminals are provided. For better handling, the connection terminals can be removed from their plug-in connection. Connect the speakers to contacts 4 and 5 of the plug-in screw terminals. 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. Always use sufficiently dimensioned cables (min. 2.5 mm²). Please refer to skilled personnel if you are not familiar with the connection of several speakers.

• Contact configuration of the outputs:
• Example for the calculation number of speakers/impedance
• The input impedance of the speaker systems should at least be the same or even higher than the output impedance of the amplifier.

Power Supply
Finally connect the amplifier to a mains outlet with the mains cable.

OPERATION

Switching on/off
To prevent loud switching noise, always switch on all other units of the amplifier system before switching on the power amplifier. After the operation, switch off the power amplifier first. Prior to switching on set all level controls to the left stop position. Then switch on the amplifier with the power switch. The power indicator lights up. After switching on, the turn-on delay is activated for a few seconds to protect the speakers. If there is no signal, the amplifier is in standby mode and the STAND BY indicator lights.

Adjusting the Level
Set the output of the mixer or preamplifier to its rated value (0 dB) or to the highest undistorted output signal. Adjust the level controls to the desired volume value. If the clip indicator lights up, the amplifier is overloaded. In this case, reduce the volume correspondingly.

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 the case of DC voltage at a speaker output
• in case of a short-circuit at a speaker output (the clip indicator of the corresponding channel lights up)
• 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.

PROBLEM CHART

CLEANING AND MAINTENANCE

1. DANGER TO LIFE! Disconnect from mains before starting maintenance operation! Please use a soft lint-free and moistened cloth. Never use alcohol or solvents!
2. There are no serviceable parts inside the device. Maintenance and service operations are only to be carried out by authorized dealers.
3. 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.

TECHNICAL SPECIFICATIONS

Specifications are subject to change without notice due to product improvements

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. © 2021 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. D00136690, version 1.0, publ. 29/11/2021 www.omnitronic.de

OMNITRONIC Showequipment GmbH Andreas-Bauer-Str. 9 97297 Waldbüttelbrunn, Germany

References

• StGB - nichtamtliches Inhaltsverzeichnis
• DIN - Deutsches Institut für Normung
• Omnitronic: Ihr Hersteller und Großhändler für Audioequipment
• A virtual server
• Verein Deutscher Ingenieure e.V. | VDI

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