MPA-50 40-Watt PA Amplifier
(320-2002)                 Preparation                Faxback Doc. # 51510

Presetting The Controls

WARNING:  A sudden high output from the amplifier could damage your
          hearing or the speakers connected to the amplifier's output.

To avoid accidentally overdriving a channel or prematurely amplifying an 
audio input, set all the amplifier's  front-panel controls to their lowest 
settings.

To avoid sudden audio from the input sources, be sure all audio devices 
are turned off before you connect them to the amplifier.

Choosing A Location

Choose a location with adequate ventilation.  Do not place the amplifier 
on thick carpeting or cushions (which can restrict the air flow) or near
a heat source, such as a heat vent or radiator (which can cause the 
amplifier to overheat).

Placing The Speakers

Speaker placement depends on your room's size and arrangement.  We recommend 
you play a wide-range recording and experiment with speaker placement until 
you find the locations that result in the best sound.

Notes:  Place the speakers so they are mounted slightly above the heads of
        listeners and pointed toward them.

        When using more than one speaker, overlap the projection areas of
        the speakers to prevent "dead" spots.

Making Connections

IMPORTANT:  Connect all auxiliary equipment and speakers before connecting
            power.

PHONO L (Left) and R (Right) - Connect a turntable with a magnetic
                 Input Jacks   cartridge.  To avoid distortion, do not
                               connect a high-level audio input source to
                               these jacks.  Even though the amplifier has
                               L and R input jacks, the output from the
                               amplifier is monaural.

  AUX/CD L and R Input Jacks - Connect any high-level sound source (such
                               as a tape deck, CD player, receiver, or a
                               turntable with a ceramic or crystal
                               cartridge).  To connect a stereo source,
                               use shielded audio cable (available at your
                               local RadioShack store); however, the
                               amplifier's output is monaural.

                GROUND Screw - Connect the ground wire (usually black or
                               green) from your turntable to this screw to
                               avoid a low-frequency hum. You can also use
                               this screw to ground any other system
                               connection.

         PHONO/AUX/CD Switch - Select the input source.  Even if you
                               connected auxiliary equipment to both the
                               PHONO and AUX/CD input jacks, you can use
                               only one source at a time.

      Speaker Push Terminals - Press the appropriate tab to open a
                               terminal.  Insert the end of a speaker wire
                               into the opening, then release the tab to
                               close the terminal and secure the wire (see
                               "Connecting Speakers" in Faxback Doc.
                               # 51511).

          PRIORITY Terminals - To allow MICROPHONE 1 to override all other
                               inputs, connect a SPST (single-pole,
                               single-throw) switch to the amplifier's
                               PRIORITY terminals using normal two
                               conductor wire (switch and wire available
                               at your local RadioShack store).  Refer to
                               the switch's manual for connection and
                               usage instructions.

               AC Power Cord - To use AC power, plug this cord into an AC
                               outlet.

(EB 3/1/99)

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