2
The power switch on the front panel switches the AC on and off. No current flows when this switch is in the “off”position. A power LED on the
front panel confirms that the unit is correctly powered up.
C O N N E C T I N G T H E M X 2 5 0 C C E P
Care should be taken to ensure that pin #3 of the MX250 input XLR is always connected. If connected to a balanced (differential) signal source,
pin #3 should be connected to the negative (i.e., inverting or “-”) signal line. If driven by an unbalanced (single-ended) source, pin #3 must be
tied to ground in order to avoid a significant loss in signal.The following diagram illustrates one example of how this is done.
I N P U T S I G N A L C O N N E C T I O N
Input signal connections are through the female XLRs.The MX250’s inputs have actively-balanced differential amplifiers.Whenever possible,
use the inputs in a balanced configuration.This helps minimize hum and noise pickup from the input signal cables by maximizing the
common-mode rejection (canceling voltages common to both the + and - input terminals).
The input XLRs are wired as follows:
2+
non-inverting input
3-
inverting input
1
ground
All XLR connectors are wired pin 2 hot (positive).The input impedance of the MX250 CCEP is 20 k
Ω
balanced, 10 k
Ω
or greater unbalanced.
O U T P U T S I G N A L C O N N E C T I O N
Output signal connections are through the male XLRs.The MX250 has actively-balanced differential output amplifiers.
The outputs are wired as follows:
2 signal
+
3
signal -
1
ground
I N T E R N A L S E R V I C I N G
There are no user-serviceable parts inside the MX250 CCEP.The filter modules, presets, trims, etc., should not be changed, adjusted, or modified
by anyone other than an EAW authorized service engineer.The settings within the unit are the results of careful testing and are not designed to
be modified in the field.Tampering with them will probably result in audibly inferior performance. It will also void your warranty. POTENTIALLY
LETHAL VOLTAGES ARE PRESENT INSIDE THE MX250,THEREFORE SERVICING SHOULD BE LEFT TO QUALIFIED TECHNICIANS.
-9
-12
0
-1
+1
-2
+2
-3
+3
+6
+9
+12
-6
-9
-12
0
-1
+1
-2
+2
-3
+3
+9
+12
-6
-9
-12
0
-1
+1
-2
+2
-3
+3
+6
+9
+12
0
-1
+1
-2
+2
-3
+3
-6
+6
-9
+9
-12
+12
Power
High
(High)
Mid
(None)
Low
(Low)
High
(High)
Mid
(None)
Low
(Low)
High
(High)
Mid
(None)
Low
(Low)
CX300
(MX250)
0
-1
+1
-2
+2
-3
+3
-6
+6
-9
+9
-12
+12
-6
-9
-12
0
-1
+1
-2
+2
-3
+3
+6
+9
+12
-6
-9
-12
0
-1
+1
-2
+2
-3
+3
+6
+9
+12
-6
-9
-12
0
-1
+1
-2
+2
-3
+3
+6
+9
+12
-6
-9
-12
0
-1
+1
-2
+2
-3
+3
+6
+9
+12
Right Outputs
(Right Outputs)
Left Outputs
(Left Outputs)
Center Outputs
(Right/Left Summed)
(-)
(+)
2
3
1
Inputs
Left
Right
Left Outputs
Summed Outputs
Right Outputs
Low
High
Low
High
One Main Street, Whitinsville, MA 01588
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Low
High
120VAC
50-60Hz
12W
PUSH
PUSH
PUSH
PUSH
SIGNAL
GND
PIN #2
PIN #3
PIN #1
