4MX-1243
PROFESSIONAL AUDIO MIXER
1. OUTPUT LEVEL METER
These meters show the level of output signal appearing at the STEREO OUT L, R and MONO OUT.
2. POWER SWITCH AND INDICATOR
The POWER switch is used to turn on and off the AC main power, and the LED is illuminated when the
AC main power is ON.
3. PHANTOM POWER SWITCH
This switch turns on and off the phantom power supply. The phantom power supply provides power for
condenser type microphone through the microphone cable.
When switches on, it produces 48volts DC (with 6.8kohms source impedance) at pins 2 and 3 on all of
the microphone input connectors. Pin 1 (the shield conductor) provides the ground return path.
This will power standard condenser microphones and will not affect most dynamic microphones. When
switches on or off, the voltage will ramp slowly up or down; it takes a few seconds to reach full level.
This prevents unwanted transients from reaching the microphone inputs.
4. PFL/AFL INDICATOR
This indicator will light when a PFL or AFL switch is turned on.
. AUX RETURN CONTROLS
These controls adjust the level of the L and R signals that are received at the rear panel AUX RETURN 1,
2. You can use the AUX RETURN as auxiliary inputs, as well as affects returns.
6. AUX SEND CONTROL (OUTPUT CHANNEL)
This control adjusts the level of the signal output from the AUX SEND OUT.
7. AFL SWITCHES
Press this switch to monitor the AUX SEND signal through the HEADPHONE.
8. BALANCE CONTROL
This knob assigns the signal of AUX RETURN, determining the stereo of the sound.
9. HEADPHONE LEVEL CONTROL
This control is used for adjusting the level of headphone monitoring.
10. HEADPHONE JACK
Connect the headphones here. You can monitor the following signals.
1) Pre-fader signal When the corresponding PFL switch is ON.
2) AUX SEND signal When the corresponding AFL switch is ON.
3) Normally when PFL and AFL switch is OFF, the headphone will monitor the same signal as the
STEREO L/R jacks.
11. MAIN OUTPUT FADERS
The stereo and mono master faders independently adjust level of the L/R and MONO channel main buss
signals appearing at the STEREO L/R and MONO OUT connectors.
12. TRIM CONTROLS
This control adjusts the input sensitivity of each channel from –16dB to –60dB for microphone source
through the XLR input, and from +24dB to –20dB for line source through the phone jack input.
For the best performance, adjust this TRIM control so that PEAK indicator LED lights occasionally.
