JB Systems MX4 Mk2 Operation Manual

Operation Manual

Mode d'emploi

Gebruiksaanwijzing

Bedienungsanleitung

Manual de instrucciones

Version: 1.0

The Power Source for DJ’s

WWW.BEGLEC.COM

Copyright © 2004 by BEGLEC cva.

Reproduction or publication of the content in any manner, without express permission of the publisher, is prohibited.

ENGLISH OPERATION MANUAL

JB SYSTEMS 1/30 MX4 Mk2

OPERATION MANUAL

FEATURES

• 11 inputs on 4 channels (7line, 3phones, 1micro)

• 1 DJ micro with talkover

• Gain, treble, mid, bass controls on all channels

• Assignable and easy replaceable crossfader

• High quality, easy gliding “steel rail” DJ faders

• 2 Master outputs, master1 with balance control

• Master1 with balanced XLR outputs

• LED VU-meters on PFL and masters

• Beat leds help you to find the right cadence

• Crossfader starts for compatible CD players

• Pre-fade listening with cue mix option

BEFORE USE

Check the contents:

Check that the carton contains the following items:

• MX4 Mk2 Mixer

• Operating instructions

ENGLISH OPERATION MANUAL

JB SYSTEMS 2/30 MX4 Mk2

SAFETY INSTRUCTIONS:

CAUTION: To reduce the risk of electric shock,

do not remove any cover. No user-serviceable
parts inside. Refer servicing to qualified service

personnel only.
The lightning flash with arrowhead symbol within the equilateral triangle is
intended to alert the use or the presence of un-insulated “dangerous voltage”
within the product’s enclosure that may be of sufficient magnitude to
constitute a risk of electric shock.
The exclamation point within the equilateral triangle is intended to alert the
user to the presence of important operation and maintenance (servicing)
instructions in the literature accompanying this appliance.

To prevent fire or shock hazard, do not expose this appliance to rain or moisture. Do not
place metal objects or spill liquid inside the turntable. Electric shock or malfunction may
result.

INSTALLATION GUIDELINES:

• Install the unit in a well-ventilated location where it will not be exposed to high
temperatures or humidity.

• Placing and using the unit for long periods near heat-generating sources such as
amplifiers, spotlights, etc. will affect its performance and may even damage the unit.

• The unit can be mounted a rack. Attach the unit using the 4 screw holes on the front
panel. Be sure to use screws of the appropriate size. (screws not provided)
Take care to minimize shocks and vibrations during transport.

• When installed in a booth or flight case, please make sure to have good ventilation to
improve heat evacuation of the unit.

• To avoid condensation to be formed inside, allow the unit to adapt to the surrounding
temperatures when bringing it into a warm room after transport. Condense sometimes
prevents the unit from working at full performance.

CLEANING THE MIXER:

Clean by wiping with a polished cloth slightly dipped with water. Avoid getting water inside
the unit. Do not use volatile liquids such as benzene or thinner which will damage the unit.

CONNECTIONS

Except for microphones, headphone and master outputs, all connections are cinch. Use
good quality cinch-cinch cables to prevent bad audio quality. (example: JB Systems code:
2-0370)
For more information on connections, please refer to the next chapter.
Be sure to turn off the mixer before you make changes to the different connections.
In this manual we talk about “line inputs”. This is a global name for inputs with a level
between 750mV and 2V. This includes tuners, videos, CD-players, etc.

CAUTION

ENGLISH OPERATION MANUAL

JB SYSTEMS 3/30 MX4 Mk2

CONTROLS AND FUNCTIONS

1. DJ MIC INPUT JACK: Accepts an unbalanced microphone with XLR connector. You

can find the ¼” mono jack on the rear of the mixer (29). This input is mainly used as
DJ-microphone. The talkover does not affect the signal level of this input.

2. INPUT SOURCE SELECTOR: Used to select the correct input on each channel:

Phono, line, aux or mic. On some channels there are additional input selectors on the
back.

Hint: Line, Aux, CD, Tuner, etc… are different names for inputs with almost the same signal levels.

3. GAIN LEVEL: Adjusts the input level on each channel. Use this control to adjust the
level on the VU-meter at about 0dB.

4. 3-BAND TONE CONTROLS: The frequency of each channel can be controlled
separately over a range from -26dB to +12dB. In the center position the tone control is
flat. (switched off)

5. TALKOVER: Use this switch to automatically mute the input channels 2 to 4 while you
are talking through the DJ microphone.

6. PFL SELECTOR: Used to select this channel to be monitored via the headphones
output. Pressing multiple Cue-buttons makes it possible to derive a mixed sound from
the selected sources.

7. CHANNEL FADER: Used to set the level of each channel separately.

8. CROSSFADER ASSIGN: Selects the input channels to be used with the crossfader

(10). When set to “0” the crossfader is switched off.

ENGLISH OPERATION MANUAL

JB SYSTEMS 4/30 MX4 Mk2

9. BEAT LEDS: These leds switch on and off to the rhythm of the beat. These leds help

you to find the right cadence.

10. CROSSFADER: With this fader you can mix over between the channels you selected

with the crossfader assign selectors (8). The crossfader only works when you move
the selected channel faders (7) to the desired level! The crossfader also integrates the
optical fader starts. See the next chapter for more information on this issue.

11. FADER START ON/OFF SWITCH: When you have a compatible CD-player

connected to the fader control connectors, you can control its start/stop (re-cue)
functions with the cross fader. With this switch you can turn the fader start control on
and off.

12. MASTER1 VU METERS: Monitors the output level of master1. Make sure the levels

do not exceed 0dB (or 100%). The audio risks to be distorted when the signal level
comes in the red zone of the VU-meter.

13. PFL VU METERS: Monitors the level of the channel you selected with the PFL-switch

(6). Make sure the levels do not exceed 0dB (or 100%).

14. CUE LEVEL: Used to control the output level of the headphone output.

15. CUE MIX: With this fader you can mix the master output and any of the input channels

through the headphone output (16):

• Put the fader in the extreme left position to monitor a selected PFL signal (6).

• Put the fader in the extreme right position to hear the master output.

• Put the fader in any other position to hear a mix of the two signals.

This option makes it possible to check your mix before you put it on the master output.

16. HEADPHONE jack: You can monitor all inputs/outputs when you connect any modern

stereo headphone to this 6.3mm jack.

17. MASTER1 LEVEL: Used to adjust the level of the balanced Master1 output.

18. BALANCE MASTER1: used to adjust the balance between left and right output on

Master1.

19. MASTER2 LEVEL: Used to adjust the level of the unbalanced Master2 output.

20. POWER switch: Used to turn the power of the mixer on and off. The blue led is lit

when the mixer is turned on.

ENGLISH OPERATION MANUAL

JB SYSTEMS 5/30 MX4 Mk2

REAR PANEL

21. FADER CONTROL: When connected to these inputs, compatible CD-players can be
controlled by the fader starts of this mixer.

22. MAINS CABLE: connect this cable to a 230V/50Hz mains outlet. Before use, inspect
the cable to be sure it’s not damaged!

23. GROUND (GND) CONNECTION: Many Turntables have a GND-connection. It is
preferable to connect this signal ground to the GND-connector. If your turntable does
not have a ground wire, you don’t have to use this connector.

24. MASTER1 BALANCED OUTPUT: The XLR-connectors can be used to connect this
mixer to any balanced amplifier input, using special balanced signal cables.

25. MASTER UNBALANCED OUTPUTS: The “mast.1” output has the same output signal
as the balanced master output(24) but unbalanced. The “mast.2” output carries the
same signal but can be controlled independently by the master2 level (19). Use the
outputs to connect unbalanced amplifiers.

26. RECORD OUTPUT: Carries the same signal as the master outputs but is not
influenced by the master level, balance and mono/stereo controls. Used to connect
analog recording equipment.

27. INPUT CHANNELS: each used to connect two different line level audio signals. Refer
to switch (30) to change one line input to phono level. The input source selector (2) on
the front determines which input will be active.

28. LINE INPUT CHANNEL1: used to connect a line level audio signal to channel1.

29. MIC INPUT: ¼” mono jack alternative to the XLR microphone input on the front (1).

30. PHONO/CD SWITCH: This switch makes it possible to switch between the CD and

phono level inputs on channels 2, 3 and 4.

ENGLISH OPERATION MANUAL

JB SYSTEMS 6/30 MX4 Mk2

CROSSFADER STARTS

The crossfader integrates the optical fader start switches. These fader starts are
compatible with all current JB Systems CD-players. This is how it works:

A. CROSSFADER IN LEFT POSITION:

CD-player connected to fader start connector
1 is playing, the other CD-player is paused.

B. CROSSFADER MOVES TO THE RIGHT:

CD-player connected to fader start connector
1 stops playing, returns to its previously
programmed cue point and waits in pause.
The other CD-player starts playing from its
previously programmed cue point.

C. CROSSFADER IN RIGHT POSITION:

CD-player connected to fader start connector
2 is playing, the other CD-player is paused.

D. CROSSFADER MOVES TO THE LEFT:

CD-player connected to fader start connector
2 stops playing, returns to its previously
programmed cue point and waits in pause.
The other CD-player starts playing from its
previously programmed cue point.

Important: Both fader start switches must be in “ON” position!

SPECIFICATIONS

Power Supply: AC 230 V, 50Hz
Frequency response: 20-20.000Hz (+/-2dB)
THD + noise: <0.09% @ 1kHz, 0dB
S/N Ratio (IHF-A): >86dB @ 1kHz.
Micro inputs: 1.5mV @ 10kΩ
Line/CD inputs: 150mV @ 22kΩ
Phono inputs: 3mV @ 47kΩ
Record output: 775mV @ 600Ω
Master A/B output: 1.5V @ 4k7Ω unbal.
Master A/B output: 850mV @ 600Ω bal.
Talkover: 0dB Æ -15dB
Tone controls: +12dB / -26dB
Headphone: 1.5V@33Ω
Dimensions: 294(W) x 350(H) x 95(D) mm
Weight: 4.8kg

FRANCAIS MODE D’EMPLOI

JB SYSTEMS 7/30 MX4 Mk2

MODE D'EMPLOI

CARACTERISTIQUES

• 11 entrées sur 4 canaux (7line, 3phonos, 1micro)

• 1 micro DJ avec talkover

• Contrôle du Gain, des aigus, médiums et basses sur tous les canaux

• Crossfader assignable, facilement remplaçable

• Curseurs DJ du type «steel rail» de haute qualité, glissant facilement

(curseur doté de rails en acier pour une plus longue durée de vie)

• 2 sorties Master, master 1 avec contrôle de balance

• Master1 avec sorties XLR symétriques

• VU-mètres LED sur le PFL et les masters

• Beat leds vous aident à trouver la bonne cadence

• Démarrage par Crossfader pour les lecteurs CD compatibles

• Pré écoute « Pre-fader » avec option cue mix

AVANT L'UTILISATION

Vérifier le contenu:

Vérifiez que l'emballage contienne les différents éléments:

• Unité de mixage MX4 Mk2

• Mode d'emploi

FRANCAIS MODE D’EMPLOI

JB SYSTEMS 8/30 MX4 Mk2

CONSEILS DE SECURITE:

ATTENTION: Afin d'éviter tout risque

d'électrocution, ne pas soulever le châssis de
l'appareil. L'intérieur ne contient aucune pièce
remplaçable par l'utilisateur. Confier l'appareil à

un service technique compétent..

Ce symbole attire l'attention de l'utilisateur sur la présence de 'voltage
dangereux' à l'intérieur du couvercle. Se voltage est suffisamment élevé pour
constituer un risque d'électrocution.

Ce symbole vous averti de la présence d'instructions importantes concernant
l'utilisation et l'entretient accompagnant cet appareil.

Afin de prévenir tout risque d'incendies et d'électrocutions, ne pas exposer ce appareil à
la pluie ou à l'humidité.
Ne pas insérer d'objets métalliques et ne pas verser de liquides dans l'appareil. Il pourrait
en résulter des électrocutions ou des dysfonctionnements.

CONSEILS D'INSTALLATION:

• Installer l'appareil dans un lieu bien aéré, à l'abri de l'humidité et des fortes
températures.

• Placer et utiliser l'appareil à proximité de sources de chaleur telles que spots, amplis,…
pourrait affecter ses performances et même endommager l'appareil.

• L'appareil peut être installé dans un rack. Fixer l'appareil en utilisant les 4 trous pour vis
sur la face avant. Assurez-vous d'utiliser des vis de la bonne dimension (vis non
fournies). Essayez d'éviter les vibrations et les coups lors du transport.

• En cas d'installation dans un 'flight case', assurer une bonne ventilation afin d'évacuer
la chaleur produite par l'appareil.

• Pour éviter la condensation à l'intérieur, laisser l'appareil s'adapter à la nouvelle
température ambiante après le transport. La condensation peut altérer les
performances de l'appareil.

NETTOYAGE:

Nettoyer en frottant à l'aide d'un chiffon doux très légèrement humide. Evitez de verser de
l'eau dans l'appareil. Ne pas utiliser de liquides abrasifs qui pourraient endommager
l'appareil.

CONNECTIONS

Mis à part pour les micros, les écouteurs et les sorties master, toutes les connections
sont cinch. Utilisez des câbles cinch/cinch de bonne qualité afin d'éviter un son de
mauvaise qualité. (ex.: JB Systems code: 2-0370)
Pour plus d'informations sur les connections, voyez le chapitre suivant.
Assurez-vous d'éteindre la table de mixage avant d'effectuer les différentes connections.
Dans ce mode d'emploi, il est question d'entrée ligne ou “line inputs”. Il s'agit en fait d'un
terme générique pour désigner des entrées avec un niveau compris entre 750mV et 2V.
Ceci inclus les lecteurs de CD, tuners, vidéos,…

CAUTION