JB Systems Pm4.2 MEDIAMIX Mode D'emploi page 5

ENGLISH
 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 APPLIANCE:
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
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 unit 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.
FUNCTIONS (FRONT)
1. Microphone input: This is a balanced JACK-connector without phantom power provision, hence only
suitable for dynamic microphones. You can connect the microphone on the front panel (1A) or back
panel (1B).
2. Level control for microphone: adjusts the level of the mic input. To avoid mic feedback, please make
sure that the level control is closed before a mic is connected.
3. MIC. ON/OFF switch: Used to switch the connected mic on/off.
4. Microphone Equalizer: 2-Band tone controls with an adjustment range of ±12dB. Adjust the tone
controls until you have optimal sound without feedback noises.
5. Talkover adjustment: The talkover circuit make it possible to automatically damp the music while you
speak into the microphone. There are two controls to make sure that the talkover works as expected:
 Talkover Damping (5A): adjusts the amount of damping once the talkover is active. If no talkover
effect is required the DAMPING control can be set to "off".
 Talkover Threshold (5B): adjusts when the talkover should start damping the music. The higher the
setting, the faster the talkover will come in action. Adjustments shall be made with a small screw
driver. Do not apply excessive force with the screw driver.
6. Aux/Line input: 3.5mm stereo jack that makes it easy to connect a portable audio player to the front
panel of the unit.
7. Level control for line inputs: adjusts the input level of both 1 + 2 line inputs. The control range can be
adjusted using the gain controls on the back panel (41).
8. CUE switch for stereo channels: Sends the audio of the respective channel to the headphone bus for
pre-fader listening (CUE) using the headphone output (15). An LED indicates if the CUE-function is
active.
9. Level control for internal player: adjusts the level to make a good balance between the levels of the
line inputs and internal player.
10. Master 1 Equalizer: 2-Band tone controls for master 1 with an adjustment range of ±12dB.
11. Master 1 level control: controls the level of the different master 1 outputs: unbalanced (32), balanced
(33) and terminal block (34). The control range can be adjusted using the "max level" control on the back
panel (31).
12. Master 2 level control: identical controls as for master 1 (11).
13. Master output level meter: Displays the output level set by the master1 level control (11). Note that the
setting of Max. level control (31) on the back panel does not affect the display of this meter.
14. CUE Volume: Sets the signal volume of the headphone output (15). Always set this control to minimum
before putting on headphones, as sudden high-volume impact may damage your ears.
JB SYSTEMS
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OPERATION MANUAL
PM4.2 MEDIAMIX