JDM A 4324 Operating Instructions Manual - page 3
JDM
®
4 Zone Public Address Amplifier
3
FRONT PANEL CONTROLS
1. POWER
Push switch to turn on. Power LED will illuminate when on.
2. METER
LEDs display the audio output level on the VU meter.
3. SPEAKER SELECTOR (SP1 – SP4)
These switches activate the amplifier speaker zones. Any
zones can be set to any output loading, but the total output
loading must not exceed the amplifiers maximum loading
specification.
4. SIREN
Pressing these switches will activate the siren tones. Two
sound patterns are offered, depending on which button is
pressed. One tone is continuous; the other tone varies in
pitch in a repeating cycle.
5. CHIME
Pressing this switch will activate the tone chime circuitry. This
is a four-tone ascending sound - ʻBONG BONG BONG
BONGʼ.
6. BLANK PANEL (PACK)
This is used for mounting the optional tuner (A4344A) or CD
player (A4346) modules or ʻPACKsʼ, which can be installed
into front panel slot, with the complementary antenna module
being installed on the rear.
7. MIC / LINE
These knobs (CH1 to CH5) adjust the volume levels of the
microphone or line inputs as selected by the rear panel switch
of CH 1 to CH 5.
8. BASS (EQUALISER)
Knob to adjust the low frequency sound to the MASTER
volume output.
9. TREBLE (EQUALISER)
Knob to adjust the high frequency sound to the MASTER
volume output.
10. MASTER
This knob is used for adjusting the volume of the output audio
mixed from all five sources.
11. PACK (BASS & TREBLE)
These BASS and TREBLE knobs control the bass and treble
signals of the optional tuner or CD player (also called
ʻPACKʼ), but only when either is installed in the front slot of
the amplifier.
7
8
10
3
4
5
11
1
2
6
ON
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Fig 1: Front Panel Controls