12
POWERLINX PLM-4 MIXER/PREAMPLIFIER
Description of Controls
1)
LINE 1 - 3 INPUTS
Stereo, line-level RCA inputs for tape decks, CD players, tuners, etc.
2)
MICROPHONE (MIC) INPUT
Balanced XLR connector suitable for almost any kind of microphone, balanced
or unbalanced. The microphone signal is evenly distributed to the left and right outputs. Pin-out is: 1 (GND), 2 (HI), 3 (LO).
3)
OUTPUTS
The PLM-4 offers both unbalanced RCA connectors for short wire runs to other unbalanced equipment
and balanced XLR output connectors for longer wire runs to other balanced input devices such as the PLC4.1.
Both outputs may be used simultaneously if required. XLR pin-out is: 1 (GND), 2 (HI), 3 (LO).
4)
LINK CONNECTORS
Up to 3 PLM-4s may be daisy chained using 5-pin
DIN
cables via the
LINK IN
and
OUT
connectors.
Connect the
LINK OUT
of the master unit to the
LINK IN
of the #2 unit. Connect the
LINK OUT
of the #2 unit to
the
LINK IN
of the #3 unit.
Note the following when interconnecting PLM-4s:
} Up to 9 stereo line inputs and up to 3 microphone inputs are possible.
} Power need be connected only to the master unit.
}
BASS
and
TREBLE
controls affect inputs on that unit only
.
} The
MASTER
level on the master unit affects all inputs.
}
MASTER
levels on units #2 and #3 should be set and retained (5 to 7 recommended).
} The
DUCKING
switch and
SENS
. trim govern the ducking function on that unit only.
However:
} If a microphone signal is high enough to trigger ducking, at any unit, all sources to all units will be ducked
or muted at the main output of the master unit.
5)
ON/OFF SWITCH
This switch is located on the rear panel to prevent accidental switching.
6)
GROUND (GND) LIFT SWITCH
This switch isolates the signal grounds from the chassis and is switched
for least hum or buzz in the output. Note that hum or buzz may have many other possible causes.
7)
POWER SOCKET
Receives the plug from the supplied 12VDC power supply. Any AC or DC voltage supply
may be used. Power requirements are 9 to 15Vac or DC >100ma.
LEFT
RIGHT
MIC
LINE 2
LINE 1
ON
OFF
9 - 15V AC/DC 1OOmA
L
R
LINE 3
LIFT
GND
+
LINK
IN
OUT
L
R
L
R
OUTPUTS
INPUTS
1
2
3
4
5
6
{