PowerLinx Multi-channel Sound Reinforcement Systems - Tannoy

{
12
POWERLINX PLM-4 MIXER/PREAMPLIFIER
Description of Controls
4
3
1
6
5
ON
OFF
LIFT
GND
OUT
LINK
IN
LEFT RIGHT LINE 3 LINE 2 LINE 1 MIC
L
L
L
R
R
R
2
+
9 - 15V AC/DC 1OOmA
OUTPUTS
INPUTS
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.