Radio Shack MPA-50 用户手册
5
Making Connections
ˆ
Making Connections
Important: Connect all auxiliary equipment and speakers before connecting power.
PHONO L (Left) and R (Right) Input
Jacks — Connect a turntable with a
magnetic cartridge. To avoid distortion,
do not connect a high-level audio input
source to these jacks. Even though the
amplifier has
Jacks — Connect a turntable with a
magnetic 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 — Con-
nect any high-level sound source (such
as a tape deck, CD player, receiver, or a
turntable with a ceramic or crystal car-
tridge). To connect a stereo source, use
shielded audio cable (available at your
local RadioShack store); however, the
amplifier’s output is monaural.
nect any high-level sound source (such
as a tape deck, CD player, receiver, or a
turntable with a ceramic or crystal car-
tridge). 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.
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
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. In-
sert the end of a speaker wire into the
opening, then release the tab to close
the terminal and secure the wire (see
“Connecting Speakers” on Page 7).
appropriate tab to open a terminal. In-
sert the end of a speaker wire into the
opening, then release the tab to close
the terminal and secure the wire (see
“Connecting Speakers” on Page 7).
PRIORITY Terminals — To allow
MI-
CROPHONE 1
to override all other inputs,
connect an SPST (single-pole, single-
throw) switch to the amplifier’s
throw) switch to the amplifier’s
PRIORITY
terminals using normal two-conductor
wire (switches and wire are available at
your local RadioShack store). Refer to
the switch’s manual for connection and
usage instructions.
wire (switches and wire are 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.
plug this cord into an AC outlet.
32-2002.fm Page 5 Friday, February 11, 2000 11:36 AM