Radio Shack PLMRA420 - Manual (Page 12)

20
21
p r e c a u t i o n s
Do not operate the amplifier when it is unmounted.
Attach all audio system components securely within
the automobile to prevent damage, especially in an
accident.
Do not mount this amplifier so that the wire
connections are unprotected, or in a pinched
condition, or likely to be damaged by nearby objects.
Before making or breaking power connections in
your system, disconnect the vehicle battery. Confirm
that your head unit or other equipment is turned off
while connecting the input jacks and speaker
terminals.
If you need to replace the power fuse, do so only
with a fuse identical to that supplied with the amplifier.
Using a fuse of a different type or rating may result
in damage that isn’t covered in the manufacturer’s
warranty.
n o t e s
STOP
YES! NO!
2 -c hannel A m p l i f i e r
(Operating in Stereo)
4 ohm
4 ohm
Two 4-ohm speakers, wired in stereo,
will present a 4-ohm load to each
channel of the amplifier. Most two-
channel amplifiers will work well in this
configuration. Two 4-ohm speakers, wired in parallel
to a bridged two-channel amplifier.
will present a 2-ohm mono load to the
amplifier. MOST TWO-CHANNEL
AMPLIFIERS DO NOT SUPPORT 2-OHM
MONO OPERATION! AMPLIFIER DAMAGE
COULD RESULT!
s ound a round, I nc.
1600 63rd s treet. b rooklyn. ny 11204
4 ohm
4 ohm
2 -c hannel A m p l i f i e r
(Operating in
Bridged Mono)
STOP
YES! NO!
Four 4-ohm speakers, wired in stereo,
will present a 4-ohm load to each
channel of the amplifier. Most four-
channel amplifiers will work well in this
configuration. Four 4-ohm speakers, wired in parallel
to a bridged four-channel amplifier,
will present a 4-ohm mono load to the
amplifier. MOST FOUR-CHANNEL
AMPLIFIERS DO NOT SUPPORT 2-OHM
MONO OPERATION! AMPLIFIER DAMAGE
COULD RESULT!
s ound a round, I nc.
1600 63rd s treet. b rooklyn. ny 11204
4 -c hannel A m p l i f i e r
(Operating in
Bridged Mono)
4 ohm
4 ohm
4 ohm
4 ohm
4 -c hannel A m p l i f i e r
(Operating in Stereo)
4 ohm
4 ohm
4 ohm
4 ohm