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Output Signal Levels
The maximum output level on the balanced
outputs is +27.5 dBu. Each channel's output
can be monitored with the four-segment LED
output level meter.
Driving Unbalanced Loads
CAUTION: ALWAYS LEAVE XLR PIN 3
FLOATING WHEN DRIVING UNBALANCED
LOADS.
XLR to RCA Wiring:
1. Connect XLR pin 2 (+) to RCA center pin.
2. Connect XLR pin 1 (GND) to RCA shield.
3. Make no connection to XLR pin 3 (-).
XLR to ¼" TS Wiring:
1. Connect XLR pin 2 (+) to Tip.
2. Connect XLR pin 1 (GND) to Sleeve.
3. Make no connection to XLR pin 3 (-).
MPA1 Instruction Manual
AC Power Entry Connector
The AC power input uses a standard IEC type
connector and includes a power switch.
Factory-configured 110V units ship with a
power cord. 220V units ship without a power
cord. Location-specific IEC style power cords
may be purchased from a local source
(including any local Benchmark dealer).
Fuse Holder
The fuse holder is built into a drawer next to
the IEC power connector. The drawer requires
two 5 x 20 mm 250 V Slo-Blo
The drawer includes a voltage selection switch
with two settings: "110" and "220". Both
settings use a 0.5 Amp fuse.
The AC input has a very wide input voltage
range and can operate over a frequency
range of 50 to 60 Hz. At the "110" setting,
the MPA1 will operate normally over a range
of 105 to 140 VAC. At the "220" setting, the
MPA1 will operate normally over a range of
200 to 285 VAC.
CAUTION: FOR CONTINUED FIRE
HAZARD PROTECTION ALWAYS REPLACE
THE FUSES WITH THE CORRECT SIZE
AND TYPE (0.5A 250 V SLO-BLO
MM – LITTELFUSE® HXP218.500 OR
EQUIVALENT).
®
Type fuses.
®
5 X 20
Page 7
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