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6
SYSTEM OPERATION AND SETUP
Powering the MPA-400
Turn on the unit using the Power ON Switch (9). The Power ON LED
(12) indicating the MPA-400 is receiving power. The MPA-400 is powered
internally by the 12V/3.3A rechargeable battery. A fully charged battery
can power the unit for up to 2 hours of normal operation. The unit will
start charging the internal battery automatically when on; or when the
internal rechargeable battery is low. When charging, the Charging ON
LED (11) will remain lit.
(Note: To avoid damaging your unit, use only the provided AC cord
connected to the power input socket.)
When the Low Battery ON LED (10) is on, this means the MPA-400
needs to be charged as soon as possible. When charging, the LED
remains red. When charging is complete, the LED turns Green. For op-
timum use, the MPA-400 should be fully charged each time. Disconnect
the AC cord when charging is complete.
(Note: Do not turn off the MPA-400 Power ON Switch until the Battery
charging LED ON indicator lights green, the battery is fully charged and
ready to power the MPA-400 alone. Shut off the Power ON Switch and
disconnect the AC cord. If the unit is not to be used for a long period of
time, make sure the battery is fully charged before put it away for next
use.)
(Note: When the Charge ON LED is not turns Green or the operating
hours is noted less, the internal battery might need replacing.)
External Power for Charger
Plug the external provided power cord into AC Input Socket (13).
Then plug the AC plug into a standard 115VAC or 240VAC outlet
(The AC adapter will detect the Line Voltage Automatically).
External 12V DC Supply
The MPA-400 can be powered externally supply via the External DC
+12V DC Input Terminal (8). Connect the external power supply wires
to the two input terminals, observing the correct polarity as marked. The
power source should provide 12VDC at current 3A or higher. The 3A
Fuse (7) is used to protect power the unit overloading. Should the fuse
burn, replace with the same type SB (Slow-Blow).
(Note: External 12V DC Supply will not charge the internal rechargeable
battery.)
7
WIRED OPERATION
The front panel has 1x ¼” input jack for connecting a wired microphone.
Doing so will disconnect the wireless microphone audio and allow wired
microphone use only.
• Plug wired microphone into ¼” input (MIC IN) with XLR-1/4” cable
• Make any necessary adjustments to Mic level and Tone
• “ MIC/WIRELESS” adjusts the input sensitivity.
NOTE: The gain knob can be used to avoid distortion and feedback. It is
best to begin with the gain lower and increase as needed.
• “ TONE” adjusts the bass and treble. Top center produces at operation
(no EQ).
-Turning the knob to the right increases the treble and reduces the bass.
-Turning the knob to the left increases the bass level and reduces the treble.
• If feedback occurs, first try turning down the Tone control (4) to MIN.
If feedback still is present, try turning down the Wire/Wireless Mic
Volume Control (5) or repositioning the MPA-400 with respect to the
wired or wireless Mic being used.
Note: Microphone elements can easily be destroyed by the buildup of
salts and minerals from perspiration and saliva. It is good practice to
place a windscreen on the mic at all times.
WIRELESS OPERATION
• Unscrew the battery compartment cover end cap (14) and remove,
exposing the battery compartment. Insert a fresh 9V alkaline battery,
observing polarity. Replace the battery cover.
• Turn on the microphone power switch (15) on the handle of the
microphone. The battery indicator LED (16) will give a single quick
ash, indicating usable battery strength. In the case of a dead or
low battery, the indicator will either not go on at all or will stay on
continuously, indicating a need to replace the battery. To preserve
battery life, turn the transmitter off when not in use.
• If there is no audio, check that the Power Switch (15) is not on
MUTE/Standby - second position.
• Adjust the volume of the MPA-400 to the desired level.
• Extend the Wireless Mic Receiver Antenna (1) fully whenever using
the wireless microphone to ensure optimum performance and maximum
range.
WIRED AND WIRELESS OPERATION