MPA-200 Stereo PA Amplifier  (320-3003)  Preparation   Faxback Doc. # 14635

CONNECTING THE GND (GROUND) SCREW TERMINAL

Connecting a mixer or playing a turn table might cause excessive noise or
hum.  To prevent this, connect one end of a low-capacitance shielded wire
to the amplifier's ground screw terminal, then connect the other end to the
ground terminal on the mixer or turn table.  Your local Radio Shack store
sells suitable shielded wires.

CONNECTING AN AUDIO MIXER OR PREAMPLIFIER

The amplifier is equipped with both RCA and metric (6.35mm) type phone 
jacks.  Connect your audio mixer's (or preamplifier's) left and right 
output jacks to the amplifier's LEFT and RIGHT INPUT jacks.

CAUTION:  Connect one type or the other, but do not connect both types at
          the same time as this will damage your amplifier.

CONNECTING SPEAKERS

You can connect 4-, 8-, or 16-ohm speakers to channels A and/or B of your
amplifier.  If you connect two pairs of speakers, be sure you follow these
guidelines:

*  Speakers connected to the same channel (A or B) are part of a pair and 
   must be of the same impedance.

*  Speakers connected to different channels (A or B) are not part of a pair
   and can be of a different impedance.

1.  Prepare the speaker wire by removing about 1 inch of insulation from
    the end of the speaker wire you intend to connect to the amplifier.
    Then twist the exposed wire to secure all the wire strands.

    NOTE:  Use 18-gauge speaker wire for lengths up to 25 feet; 16-gauge
           wire for lengths over 25 feet.  We recommend you use the
           shortest length of wire possible.

2.  Connect the speaker wires to the speaker's positive and negative 
    terminals.

    Note:  Most speaker terminals are either color-coded or have a mark
           that indicates the terminal's polarity.  Usually, positive
           terminals are red or have a plus symbol (+), and negative
           terminals are black or have a minus symbol (-).

3.  Connect the speaker wires to the receiver/amplifier's left and right
    speakers terminals according to the terminal color or polarity shown
    below.

CONNECTING HEADPHONES

To listen privately or monitor the sound sources, connect a pair of low
impedance stereo headphones (not supplied) with a 1/4-inch plug into the
PHONES jack on the amplifier's lower left front panel.  Your local Radio
Shack store sells a wide selection of headphones.

LISTEN SAFELY

Do not listen at extremely high volume levels.  Extended, high-volume 
listening can lead to permanent hearing loss.  Follow these guidelines to 
protect your hearing, especially when you use headphones.

*  Always start by setting the volume to the lowest level possible before 
   you begin listening.  Put the headphones on, then gradually increase the
   volume as necessary.

*  Once you set the volume, do not increase it.  Over a period of time,
   your ears adapt to the volume level, so a volume level that does not
   cause discomfort might still damage your hearing.

CONNECTING TO STANDARD AC POWER

After making all other connections, set POWER 0/1 to 0 (to make sure the
amplifier is off), then connect the AC power cord to a standard AC outlet.

MOUNTING THE MPA-200

The amplifier's construction includes two slots on each side of the front
panel which make it suitable for rack mounting.  To mount the amplifier on
an electronics equipment rack, tightly drive and secure mounting screws
(not supplied) through the mounting holes.


(SP/all-04/20/95)

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