JB Systems BEAT4 USB Mode D'emploi page 5

ENGLISH
29. 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.
30. INPUT CHANNEL 1: used to connect a DJ microphone and/or a line level audio signal. The input source
selector (6) on the front determines which input will be active.
31. USB CONNECTIONS: two bidirectional USB connections (USB1 for CH3 ~ USB2 for CH4). You can
connect any PC through these USB connections. The PC/Mac will detect your mixer as a sound card,
normally no drivers are needed. Since both USB ports are bidirectional you are able to play music on
your computer and mix this music with other sources like CD, phono, etc. At the same time you can
record your mix on your computer with the same USB connection!
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 A is playing,
the other CD-player is paused.
B. CROSSFADER MOVES TO THE RIGHT:
CD-player connected to fader start connector A 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 B is playing,
the other CD-player is paused.
D. CROSSFADER MOVES TO THE LEFT:
CD-player connected to fader start connector B 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!
CHANGING THE FADERS
One of the big advantages of this mixer is the possibility to change
the channel faders
This is what you must do to change a channel fader:
 Remove the fader knobs from the faders.
 Remove the 4 screws that hold the small front panel around the
faders.
 Remove the 2 screws of the fader you want to change.
 Gently remove the fader from its position and unplug the
connector from the main board. (do NOT pull the cable!)
 Put the new fader gently in place. Be sure to plug the connector
in the connector base on the mixer PCB-board.
 Put the 2 screws from the fader back in place
 Put the small front plate back in place with the 4 screws.
Done!
This is what you must do to change the cross fader:
 Remove the fader knob from the cross fader.
 Remove the 2 screws that keep the cross fader in place.
 Gently remove the fader and the cover plate from their position.
 Unplug the cross fader from the cable (unplug the cable by pulling the connector, NOT the cable!)
 Press the new cross fader on the cable.
 Put the cross fader back in place with the small cover plate and the 2 screws.
Done!
JB SYSTEMS
OPERATION MANUAL
5/39 BEAT4 USB
ENGLISH
SPECIFICATIONS
Power Supply: AC 230 V, 50Hz (34Watt)
Frequency response: 20-20.000Hz (+/-3dB)
THD + noise: <0.05% @ 1kHz, 0dB, load = 47kΩ
S/N Ratio (IHF-A): >78dB @ 1kHz.
USB connections: USB 2.0, bidirectional (44,1kHz / 16bit)
Windows
USB cable (not included): Lmax = 3m
Mic inputs: 2mV @ 3kΩ
Line/CD inputs: 340mV @ 47kΩ
Phono inputs: 3mV @ 47kΩ
Record output: 775mV @ 1kΩ
Master 1/2 output: 1.55V @ 1kΩ unbal.
Master 1 output: 2,55V @ 600Ω bal.
Talkover: 0dB  -14dB
Channel tone controls: +12dB / -26dB (70Hz, 1kHz, 13kHz)
Headphone: 3V@32Ω
Dimensions: 294(W) x 372(D) x 93(H) mm
Weight: 5,4kg
Every information is subject to change without prior notice
You can download the latest version of this user manual on our website: www.beglec.com
JB SYSTEMS
OPERATION MANUAL
® & MacOS ® compatible.
6/39 BEAT4 USB