Omnitronic Club-mixer EX-840 User manual

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BEDIENUNGSANLEITUNG
USER'S MANUAL
MODE D'EMPLOI
MANUAL DEL USUARIO
EX-840
Club-Mixer

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MULTI-LANGUAGE-INSTRUCTIONS
Inhaltsverzeichnis
Table of contents
Sommaire
Contenido
1. EINFÜHRUNG............................................................................................................................................... 8
1.1 Features ................................................................................................................................................... 8
2. SICHERHEITSHINWEISE............................................................................................................................. 9
3. BESTIMMUNGSGEMÄSSE VERWENDUNG ............................................................................................ 10
4. ANSCHLÜSSE............................................................................................................................................ 10
5. GERÄTEÜBERSICHT................................................................................................................................. 12
5.1 Vorderseite............................................................................................................................................. 12
5.2 Rückseite ............................................................................................................................................... 14
6. BEDIENUNG ............................................................................................................................................... 15
7. PROBLEMBEHEBUNG .............................................................................................................................. 15
8. AUSTAUSCHEN DES CROSSFADERS.................................................................................................... 15
9. REINIGUNG UND WARTUNG.................................................................................................................... 16
10. TECHNISCHE DATEN.............................................................................................................................. 17
1. INTRODUCTION ......................................................................................................................................... 18
1.1 Features ................................................................................................................................................. 18
2. SAFETY INSTRUCTIONS .......................................................................................................................... 19
3. OPERATING DETERMINATIONS.............................................................................................................. 20
4. CONNECTIONS .......................................................................................................................................... 20
5. DESCRIPTION OF THE DEVICE ............................................................................................................... 22
5.1 Frontpanel.............................................................................................................................................. 22
5.2 Rearpanel............................................................................................................................................... 24
6. OPERATION ............................................................................................................................................... 24
7. PROBLEM CART........................................................................................................................................ 25
8. REPLACING THE CROSSFADER............................................................................................................. 25
9. CLEANING AND MAINTENANCE ............................................................................................................. 25
10. TECHNICAL SPECIFICATIONS............................................................................................................... 26
1. INTRODUCTION ......................................................................................................................................... 27
1.1 Features ................................................................................................................................................. 27
2. INSTRUCTIONS DE SÉCURITÉ ................................................................................................................ 28
3. EMPLOI SELON LES PRESCRIPTIONS................................................................................................... 29
4. CONNEXIONS............................................................................................................................................. 29
5. DESCRIPTION DE L'APPAREIL................................................................................................................ 30
5.1 Panneau avant....................................................................................................................................... 31
5.2 Dos de l'appareil .................................................................................................................................... 33
6. MANIEMENT............................................................................................................................................... 33
7. PROBLEMES.............................................................................................................................................. 34
8. REMPLACEMENT DU CROSSFADER...................................................................................................... 34
9. NETTOYAGE ET MAINTENANCE ............................................................................................................. 34
10. CARACTÉRISTIQUES TECHNIQUES..................................................................................................... 35

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1. INTRODUCCIÓN......................................................................................................................................... 36
1.1 Features ................................................................................................................................................. 36
2. INSTRUCCIONES DE SEGURIDAD .......................................................................................................... 37
3. INSTRUCCIONES DE MANEJO ................................................................................................................ 38
4. CONEXIONES............................................................................................................................................. 38
5. VISTA GENERAL DEL APARATO ............................................................................................................ 40
5.1 Panel frontal........................................................................................................................................... 40
5.2 Panel trasero.......................................................................................................................................... 42
6. OPERACIÓN............................................................................................................................................... 42
7. SOLUCIÓN DE PROBLEMAS.................................................................................................................... 43
8. SUSTITUCIÓN DEL CROSSFADER.......................................................................................................... 43
9. LIMPIEZA Y MANTENIMIENTO................................................................................................................. 43
10. ESPECIFICACIONES TÉCNICAS............................................................................................................ 44
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OPERATING INSTRUCTIONS
EX-840 Club-Mixer
CAUTION!
Keep this device away from rain and moisture!
Unplug mains lead before opening the housing!
For your own safety, please read this user manual carefully
before you initial start-up.
Every person involved with the installation, operation and maintenance of this device has to
- be qualilfied
- 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
- include every supplementay update with the original manual
1. INTRODUCTION
Thank you for having chosen an OMNITRONIC EX-840. If you follow the instructions given in this manual,
we can assure you that you will enjoy this device for many years.
Unpack your OMNITRONIC EX-840.
Please make sure that there are no obvious transport damages. Should you notice any damages on the A/C
connection cable or on the casing, do not take the device into operation and immediately consult your local
dealer.
1.1 Features
Versatile 4+1-channel Digital Effects Mixer
Channels 1-3 switchable between Phono/Aux and Line (Phono and Aux switchable on the backpanel) •
Channel 4 switchable between Mic and Line • Mic channel with attachment possibility of 2 mics, each
individually volume-controlled, common 3-band control • Mic 1 microphone-input via XLR/1/4" jack-mounting
socket on the frontpanel • Mic 2 and Mic 3 microphone-input via 1/4" mono-jack on the rearpanel • 1
separate DJ-mic channel with Mic Level-control, 2-fold tone-control (bass, treble) and Talkover-selector •
Input-sensitivity-control (gain) for each channel • 3-fold, separate tone-control (bass, middle, treble) for each
channel • Tone-control with large range from -30 to +10 dB • Digital DSP effects • Effect types: Echo, Auto
Pan, Flanger, Manual Filter, Auto Filter, Reverb, Transition, Pitch Shifter • Assignment of the effect via the
Input Select switch possible to the input channels, crossfader sides and output • Time and Depth parameter
adjustment via parameter-control • Independent Auto Beatcounter for chosen Cue Signal and Master Signal •
Additional Tap button • Beat Sync Function: all effects can be modulated automatically to the piece of music
• Individual Beat Sync buttons set musical values • X-fader effects: control, the DSP effect using the
crossfader • By pressing the Effect Cue-button, the effect or sample can be cued with the headphones •
Effects ON/OFF button • The crossfader can freely be assigned to channels 1-4 (Channel Assign-selector) •
Crossfader Remote Start-function switchable via X-Start-button • With Crossfader Curve-function for
extremely fast cut-times and scratch-times • Headphones-connection on the frontpanel • Headphones-output
adjustable via Cue Level-control • Additional Cue Split/Cue Mix-button • Mixing of the headphones-signal

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possible via cue mixing-fader • Master-out 15-fold LED-level-displays (L/R) • Output signal adjustable via
Master-fader (Master 1) or Master-control (Master 2) • Separately controllable monitor-output (DJ-booth) for
connecting active-speakers or an additional amplifier • 2 Master-Out, Booth-Out and Rec-Out via 2 RCA-
sockets each • Additional Master 1 output via balanced XLR-connectors • Total output level of Master 1
adjustable via Level-control on the rearpanel • Rec-Out independent from Master-level for records with static
level • High-grade discotheque-mixer with a convincing sound
2. SAFETY INSTRUCTIONS
CAUTION!
Be careful with your operations. With a dangerous voltage you can suffer a dangerous
electric shock when touching the wires!
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.
Important:
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.
Always plug in the power plug least. Make sure that the power-switch is set to OFF position before you
connect the device to the mains.
Keep away from heaters and other heating sources!
If the device has been exposed to drastic temperature fluctuation (e.g. after transportation), do not switch it
on immediately. The arising condensation water might damage your device. Leave the device switched off
until it has reached room temperature.
Never put any liquids on the device or close to it. Should any liquid enter the device nevertheless, disconnect
from mains immediately. Please let the device be checked by a qualified service technician before you
operate it again. Any damages caused by liquids having entered the device are not subject to warranty!
This device falls under protection-class I. The power plug must only be plugged into a protection class I
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!
Make sure that the available voltage is not higher than stated on the AC voltage selector.
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.
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.
Before the device is switched on all faders and volume controls have to be set to "0" or "min" position.
CAUTION: Turn the amplifier on last and off first!
Keep away children and amateurs!
CAUTION: High volumes can cause hearing damage!
There are no serviceable parts inside the device. Maintenance and service operations are only to be carried
out by authorized dealers.

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3. OPERATING DETERMINATIONS
This device is a professional audio-mixer for mixing audio-signals from different music-sources with one
another. This product is allowed to be operated with an alternating current of 115/230 V, 50/60 Hz and was
designed for indoor use only.
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!
Do not operate the device in extremely hot (more than 30° C) or extremely cold (less than 5° C)
surroundings. Keep away from direct insulation (particularly in cars) and heaters.
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!
Never use spray cleaners in order to clean the faders!
Never use solvents or aggressive detergents in order to clean the device! Rather use a soft and damp cloth.
Please use the original packaging if the device is to be transported.
Never remove the serial barcode from the device as this would make the guarantee void.
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.
4. CONNECTIONS
• Install the device on a plane surface.
• Make sure that the power switch is set to OFF. Before you connect the devices, all units have to be
switched off.
• In order to obtain highest sound quality, only use high-quality cables for connecting the devices. Make sure
that the cables are properly fixed.
• You can connect up to 3 amplifiers to the EX-840. The output signal of the Master 1-signal can be adjusted
via the Master 1-fader and the balance-control. The output signal of the Master 2-signal can be adjusted via
the Master 2-control. The output-signal of the Booth-signal can be adjusted via the Booth-control.
• The Master 1-output can either be connected via the RCA-sockets or the balanced XLR mounting-plugs.
Due to the lower interference problems, we recommend to use the XLR mounting-plugs.
Occupation balanced XLR mounting-plug:
Balanced XLR mounting-plug
:
1: Ground
2: In Phase (+)
3: Out of Phase (-)
12
3
• The Master 2-output can be connected via the RCA-sockets. Make sure that the sockets are set properly (L
& R).

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• Via the BOOTH sockets, you can either connect monitor active speakers for the DJ-booth or an additional
amplifier for creating a second zone.
• For recording, connect your tape recorder or cassette deck to the REC OUT-sockets. The REC OUT level
will not be influenced by the master fader. You can set the output level with the channel faders, the tone
controls and the GAIN control.
• The EX-840 features one separately controllable microphone channel (MIC 1). This microphone can be
connected via the XLR/1/4“ jack-mounting socket on the frontpanel accepting ¼" jack plugs and XLR-plugs.
With the Talkover-button, you can attenuate the level of all other signal-sources without affecting the
microphone volume.
Occupation balanced XLR-socket:
Balanced XLR-socket:
1: Ground
2: In Phase (+)
3: Out of Phase (-
)
12
3
Occupation balanced stereo-1/4“ jack-plug:
• Additionally, the EX-840 features one more ¼" Mic 1 jack plug on the rearpanel. You can adjust the
microphone volume using the CH-1 fader. Make sure that the LINE 1/MIC 1-switch is set to MIC 1.
• You can connect up to 3 record players using the PHONO 1 sockets, PHONO 2 sockets and PHONO 3
sockets on the rearpanel. You can only control the record player signal after you switched the PHONO /
LINE switches to PHONO. The signal is then controlled via the CH-2, CH-3 and CH-4 faders.
• Connect your tape recorder, tuner, CD-player, cassette deck or all other line signals to the LINE /AUX
sockets on the rearpanel. You can only control the line signals after you switched the PHONO/LINE switches
to line. The signal is then controlled via the respective faders.
• Connect the device to the mains with the enclosed power supply cable.

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5. DESCRIPTION OF THE DEVICE
5.1 Frontpanel
(1) PHONO / LINE / AUX-SWITCH
Used to select the input to be sent to the individual channel.
(2) GAIN-CONTROL
Used to set the level of the input signal.
(3) CUE-BUTTON
Use the CUE-button in order to select the channel(s) to be monitored.
(4) TREBLE-CONTROL
Used to increase or lower the HIs of the input signal.
(5) MIDDLE-CONTROL
Used to increase or lower the MIDs of the input signal.
(6) BASS-CONTROL
Used to increase or lower the LOWs of the input signal.
(7) CHANNEL-FADER
Used to adjust the input level of each channel.
(8) X-FADER ASSIGN-BUTTON
Via the X-Fader Assign-button, you can choose to which side of the crossfader you assign the selected
channel.
(9) CURVE ON/OFF-BUTTON
With the Curve On/Off-button, you can between the Crossfader-modes Soft and Sharp. In the Soft-
mode, the Crossfader fades between the channels in a linear, continuous manner. In the Sharp-mode,
the Crossfader works more logarhytmical, i.e. working faster towards the outer edges.
(10)FADERSTART-BUTTON
Press this button to activate the faderstart.
(11)CROSSFADER
Mixes the signals of one channel with another. If the crossfader is in the center-position, both channels
can be heard at the same volume.
(12)MIC 1-SOCKET
You can connect microphones with XLR-plug or jack.
(13)TREBLE-CONTROL
Used to increase or lower the HIs of the microphone signal.
(14)MIDDLE-CONTROL
Used to increase or lower the MIDs of the microphone signal.
(15)BASS-CONTROL
Used to increase or lower the LOWs of the microphone signal.

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(16)TALKOVER-SELECTOR
The TALKOVER-selector has 3 different functions:
OFF: the microphone is switched off.
MIC ON: the microphone is activated.
TALKOVER: the level of all other signal-sources is attenuated by 14 dB, so that the microphone can
clearly be heard.
(17)MIC 1 VOLUME-CONTROL
With the MIC 1 VOLUME-control, you can adjust the mic 1 volume.
(18)MIC 2 VOLUME-CONTROL
With the MIC 2 VOLUME-control, you can adjust the mic 2 volume.
(19)MASTERFADER
Adjusts the level of the master 1 output.
(20)ZONE VOLUME CONTROL
The EX-840 features a DJ BOOTH monitor system. Connect your monitor system with the BOOTH-
sockets on the rearpanel.
(21)BALANCE-CONTROL
Used to adjust how much of the signal is sent to the left and right MASTER-socket.
(22)MONO/STEREO SWITCH
Used to set the master output to mono or stereo. If you connected a mono-signal via 1 RCA-socket, you
can switch the output signal to STEREO in order to have a stereo output signal.
(23)MASTER LEVEL / CUE LEVEL DISPLAY
The lower display shows the level of the left and right master output.
The upper display shows the level of the channel currently being cued (CUE LED on).
(24)POWER SWITCH
Press this button to start operation.
(25)PARAMETER TIME-CONTROL
With the Parameter Time-control, you can adjust the effect time.
(26)PARAMETER RATIO-CONTROL
With the Parameter Ratio-control, you can adjust the effect ratio.
(27)INPUT SELECTOR
For selecting the desired source.
(28)EFFECTS SELECTOR
For selecting the desired effect.
(29)EFFECTS DISPLAY
(30)BEAT SYNC-BUTTONS
Via the Beat Synch-buttons, you can adjust the effects to the current track's beat.
(31)X-FADER EFFECTS-BUTTONS
(32)EFFECTS CUE-BUTTON
Use the Effects-Cue-button in order to monitor the effects.
(33)EFFECTS ON/OFF-BUTTON
Use the Effects On/Off-button in order to switch the effects on and off.
(34)TAP-BUTTON
Via the Tap-button, you can display the beats per minute of a track. Press the button in the rhythm of the
music. The display shows the current beats per minute (BPM).
(35)BOOTH-CONTROL
The EX-840 features a DJ BOOTH monitor system. Connect your monitor system with the BOOTH-
sockets on the rearpanel.
(36)CUE MIXING FADER
Connect your headphones to the HEADPHONES socket. With the CUE-buttons, you can select the
desired channel.
When you set the CUE MIXING-fader to PGM (CUE-buttons without function), you can cue the output
signal of the mixer.
When you set the CUE MIXING-fader to to the center position, you can cue both the channel-signal you
selected and the output-signal.
(37)CUE SPLIT/CUE MIX BUTTON
Cue Split-function (button pressed): the Cue-signal is on the one side of the headphones and the output-
signal on the other side.
Cue Mix-function (button released): the adjustable mix of Cue-signal and output-signal is on both sides
of the headphones.
(38)CUE LEVEL-CONTROL
With the Cue Level-control, you can adjust the phones volume without changing the output signal.
(39)HEADPHONES SOCKET
Use this socket to connect the headphones. Headphones from 8 Ohms to 600 Ohms can be used.

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5.2 Rearpanel
(40) MIC 2-SOCKET
Connect your microphone with ¼" jack plug here.
(40) MIC 3-SOCKET
Connect your microphone with ¼" jack plug here.
(42), (43), (44) LINE / PHONO / AUX INPUT-SOCKETS
Input socket for CH-1, CH-2 and CH-3. Connect turntables equipped with MM pickup cartridge to PHONO
input. CD players or Tape Decks should be connected to LINE input. Line level musical instruments with
stereo outputs such as Rhythm Machines or Samplers should also be connected to LINE inputs.
GND (Ground terminal)
Connect the ground lead of the turntable with this terminal. This helps to reduce humming and pop noises.
(45) LINE 4 INPUT-SOCKETS
Input socket for CH-4.
(46) REC OUT
To connect your recording unit.
(47) ZONE OUT
Connect your monitor system here.
(48) MASTER OUT
Output sockets for connecting your power amplifier.
(49) X-START-SOCKETS
Via the Start-socket, the respective CD-player can be remotely controlled via the Crossfader. If you are using
a CD-player with Faderstart-function connect the mixer with the Control-socket. Please note that these
sockets must never be connected with any voltage.
(50) DIGITAL OUT-SOCKET
The music-signal of this socket is digital. Connect the output to the respective input of a digital amplifier for
example.
(51) TRIM CONTROL
For adjusting the digital signal output.
(52) BALANCED MASTER OUTPUT
Balanced output for the master signal.
(53) VOLTAGE SELECTOR
Make sure that the indication corresponds to the available voltage.
(54) AC CONNECTION
Plug the power supply cable in here.
6. OPERATION
Switch the device on via the power switch.
As soon as the Audio-signals are present the signal level is displayed. You can adjust the level of the input
signals via the Gain-control.

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7. PROBLEM CHART
PROBLEM: CAUSE: REMEDY:
No power. • The power-cord is not connected. • Check the power-cord and any
extension-cables.
No sound. • The PHONO/LINE/AUX-switch of the
respective channel is in the wrong
position.
• The power-cord of the respective
device is not connected properly or
not connected at all.
• The connection-socket or the plug is
dirty.
• Put the PHONO/LINE/AUX-switch
into the correct position.
• Check the power-cord and if the
plugs are tightly connected with the
sockets.
• Clean the socket and/or the plug.
Noise. • The input-signal is too strong. • Reduce the input-signal via the Gain-
control.
While you are changing the
crossfader assignment, the
master-output cuts off.
The assignment of both Channel
Assign-selectors overlaps.
Switch the crossfader off with one of
the Channel Assign-selectors before
you change the assignment.
The desired channels
cannot be synchronized.
The wrong channels have been
selected with the Channel Assign-
selectors.
Select the correct channels.
8. REPLACING THE CROSSFADER
Instructions for replacing the crossfader:
• Remove the fader knob.
• Remove the two outer screws on the fader-panel.
• Take the fader out and unplug the connection-cable.
• Connect the new fader and fix it in the device.
The fader-panel of the replacement-crossfader cannot be used for the Design-version. In order to exchange
the fader-panels, additionally unscrew the 2 inner screws and exchange the two fader-panels.
9. CLEANING AND MAINTENANCE
Disconnect from mains before starting maintenance operation!
DANGER TO LIFE!
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 servicable parts inside the device. Maintenance and service operations are only to be carried
out by authorized dealers.

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Should you need any spare parts, please use genuine parts.
Should you have further questions, please contact your dealer.
10. TECHNICAL SPECIFICATIONS
Power supply: 115/230 V AC, 50/60 Hz ~
Power consumption: 35 W
Inputs: 3 phono, 4 line, 3 mic
Input Sensitivity:
Microphone 1: 1.7 mV RMS, 2,2 kOhms
Microphone 2 & 3: 1.7 mV RMS, 3 kOhms
Phono: 3.4 mV RMS, 47 kOhms
Line: 340 mV RMS, 20 kOhms
Output voltage:
Master Out XLR: 1.23 V / 600 Ohms
Rec. Out (analog): 316 mV RMS / 1 kOhms
Rec. Out (digital): 0.5 V RMS / 75 Ohms
Headphones: 3000 mV @ 32 Ohms (>16 Ohms)
Outputs: 1 Master-Out, symmetrisch XLR + RCA
1 Rec-Out (analog, RCA)
1 Rec-Out (digital, RCA)
1 Zone (RCA)
1 Booth (RCA)
Frequency range:
Microphone: 20 - 20,000 Hz, +1 / -3 dB
Phono: 20 - 20,000 Hz, +1 / -2 dB
Line: 20 - 20,000 Hz, +1 / -2 dB
Effects (dry): 20 - 20,000 Hz, +1 / -2 dB
Total harmonic distortion:
Phono: < 0.02 %
Line: < 0.02 %
Effects (dry): < 0.05 %
S/N-ratio:
Microphone 1: <-60 dB
Microphone 2 & 3: <-62 dB
Phono: <-70 dB
Line: <-70 dB
Effects (dry): <-70 dB
Talkover-attenuation: -14 dB ± 1 dB
Tone control/channel:
Treble: -30 dB to +10 dB, ± 1 dB at 13 KHz
Middle: -30 dB to +10 dB, ± 1 dB at 1 KHz
Bass: -30 dB to +10 dB, ± 1 dB at 70 Hz
Tone control/Mic:
Treble: ± 12, ± 2 dB at 13 KHz
Middle: ± 12, ± 2 dB at 1 KHz
Bass: ± 12, ± 2 dB at 70 Hz
Cross Talk (Line): < -70 dB at 1 KHz between L & R and between channels
Dimensions (WxDxH): 482 x 266 x 105 mm
Weight: 5 kg
Please note: Every information is subject to change without prior notice. 29.10.2003 ©