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5
MIX-4 Installation and Operation Manual
OPERATION
Inspection
Please examine your Mix-4 carefully for any damage sustained during shipping. If
any damage is present, please notify the shipper immediately and retain the packag-
ing for inspection by the shipper. The package contains the Mix-4 and a +/-15 VDC
wall power supply (PS-1515) with domestic connector. Manuals can be downloaded
from our web site.
Installation/Operation
RFI and surge suppression suggestions
LED indicators
• “PWR” LED: Illuminates when power is applied. (Green)
• “P15” LED: Illuminated when +15-volt DC phantom microphone power is
switched on. (Green)
• “LT” LED: Indicates left channel audio output activity. (Green)
• “RT” LED: Indicates right channel audio output activity. (Green)
• “1” “2” “3” “4” LEDs: Lit when respective input channel is switched on. (Green)
Front Panel Controls
“1” “2” “3” “4” pushbuttons: Used to turn each input channel on or off. When a but-
ton is switched in, the channel is on and when a button is switched out, the channel
is off. Each switch can be disabled using the SW7 dipswitch on the printed circuit
board. Turning each input Dip-switch ON, disables the front panel switch and forces
each input ON.
To access dipswitch SW7, remove power. Remove the four-front panel screws and
metal front panel. Locate the SW7 on the right side of the circuit board behind input
fours level control. SW7-1 is controls input one, SW7-2, for input two, SW7-3 input
three and SW7-4 controls input four. Reassemble the Mix-4.
“1” “2” “3” “4” level adjustment knobs: Each input channel is supplied with a front
panel level control. When the control is turned fully counterclockwise, the channel is
OFF. When the control is turned fully clockwise, 12 dB of gain is added to the input
level. Unity gain can be achieved by turning the control to the 2 o’clock positon.
Power +/- 15VDC.
Connect the 3-pin AMP-style latching power connector to the unit and the +/-15 VDC
switching power supply (PS-1515) with domestic connector into a 120 Vac 50-60 Hz
power source. Never use any type of power supply other than the specified/supplied
power supply.
CAUTION!
Installation of the Mix-4
in high RF environments
should be performed
with care. It is recom-
mended that all cables
connected to the Mix-4
be looped through ferrite
cores to suppress RF. All
shields should be tied to
the “Chs Gnd” ground
terminal. Surge protec-
tion with RF filtering is
also suggested. For
lightning protection
devices, check out
www.polyphaser.com
and www.itwlinx.com.
WEBSITE:
Visit our web site for
product updates and
additional information.
