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68-1436-50
Rev B
11 10
Step 5 — Connect power cords to the MPA 401 and other audio equipment. The MPA 401-100V ships with an Extron 36 W
desktop power supply (PS 1230; part number 70-769-01). The MPA 401-70V ships with either the Extron 36 W desktop
power supply or the Extron 12 VDC, 5 A power supply (EPS 1250 C; part number 70-725-01).
When connecting the EPS 1250 C power supply, ensure the polarity of the wires is correct. The wire with ridges is the
ground or negative (see figure below left). To use the PS 1230, connect the pre-wired captive screw connector into one of
the two pole, 3.5 mm captive screw receptacles on the power supply and the other end into the Power receptacle on the
amplifier, as shown in the figure at right.
Power Receptacle
DC Power Cord
Captive Screw Connector
AC Power Cord
Ground
+12 VDC
EPS 1250 C
Power Supply
(12 VDC, 5 A )
POWER
12V
1.5 A MAX
SECTION A–A
Ridges
Smooth
Power Supply
Output Cord
AA
3/16"
(5 mm) Max.
12V
1.5 A MAX
MPA 401-70V
OR
Power Receptacle
DC Power Cord
Captive Screw Connector
POWER
12V
1.5 A MAX
MPA 401 series
Amplifier
DC Power
Outputs
AC Power Cord
Tie
Wrap
Captive Screw
Connector
Power Supply
Output Cord
PS 1230 Power Supply
CAUTIONS: See the caution in the Power Input section of the MPA 401 Series User Guide for important information
about using power supplies.
When the PS 1230 power supply is connected to the MPA 401, it must not be shared with any other devices.
Step 6 — Adjust the MPA 401 input level, bass, and treble (see figure at right).
1. If necessary, unplug the remote plug from the unit see step 7, below).
2. If connecting the amplifier to a system with adjustable volume, set the volume to its lowest
point. Then adjust the MPA 401 front panel level potentiometer fully counterclockwise.
3. Set the system volume to its maximum volume level (no sound should come out).
4. Return to the MPA 401 and raise the level until sound distortion first occurs, then lower slightly until the distortion
disappears. This setting ensures that, whatever the system volume setting may be, no clipping occurs.
5. Adjust bass and treble to preference.
Step 7 — The rear panel 3-pole Remote captive screw connector on the amplifier can be used for remote control of the
volume by an Extron volume controller such as an Extron VCM 100 AAP, VC 50, or MLA-VC10. A MediaLink controller can
also adjust the audio volume via a network connection or by IR remote (see the MPA 401 Series User Guide).
MINI POWER AMPLIFIER
MPA 401
2
Extron® MPA 401-70V and MPA 401-100V • Setup Guide (Cont’d)
(47 paginas)
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