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CHAPTER 2: MPS-482HP FRONT AND REAR PANELS
Table 2: Green Load Current LEDs
State
Cause
Unlit
MPS-482HP not
(all LEDs)
powered on or no
loudspeakers connected
Unlit
No loudspeaker
(single LED)
connected
Glows
LED glows brighter
brighter
as channel's audio
(single LED)
signal level increases
CAUTION:
When a blue Voltage LED is unlit and
its corresponding green Load Current LED is
unlit, indicating a surge or short for the channel, power
down the MPS-482HP, inspect the loudspeaker
cabling for that channel, and check the fuse.
MPS-482HP REAR PANEL
The MPS-482HP rear panel includes an AC Input connector,
two channel XLR inputs and one 6-pin Phoenix input for
receiving source audio, a Link switch for routing audio from
inputs to outputs, and two Phoenix 5-pin channel outputs
for delivering DC power and balanced audio.
MPS-482HP Power Supply Rear Panel
AC Input
The MPS-482HP has a powerCON 20 twist-lock AC Input
connector (line, neutral/line, earth). The connector can
accept different power cable types for outlets used
throughout the world. Make sure to use the correct power
cable for the AC power in your area. The MPS-482HP
operates at an AC voltage range of 100–240 V at 50–60 Hz.
Channel Inputs
The MPS-482HP receives two channels of balanced audio
via the two channel inputs. The inputs are equipped with two
3-pin XLR female connectors and a 6-pin Phoenix connector,
but only one set may be used at a time. The XLR connector
pinout is: pin 1, ground; pin 2, signal positive; pin 3, signal
negative. Make sure to use standard balanced XLR cables
12
Recommended Action
Verify the MPS-482HP is
powered on and verify its
power source; inspect
the loudspeaker cabling
Power down the MPS-
482HP and inspect the
loudspeaker cabling for
the channel
None required
with all three pins connected on both ends. The Phoenix
connector supports two channels with the following pinout
(from left to right): pin 1, channel one ground; pin 2, channel
one signal positive; pin 3, channel one signal negative; pin 4,
channel 2 ground; pin 5, channel 2 signal positive; pin 6,
channel 2 signal negative.
MPS-482HP Channel Inputs
Channel inputs default to being routed to their
corresponding channel outputs but channel one can also be
routed to the channel two output with the Link switch,
although this selection affects the input impedance (see
"Input Impedance for Linked Channel Inputs" on page 13).
Link Switch
The Link switch determines how the two inputs are routed to
the two outputs. When the input's Link switch is OFF (set to
the down position), each input is only routed to its
corresponding output (Input 1 routed to Output 1 and Input
2 is routed to Output 2).
When the Link switch is ON (set to the up position), Input 1
is routed to both Output 1 and Output 2.
NOTE:
Input Two is inactive when the Link
switch is enabled. Connections should not be
made to the inactive input.
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