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Owner's Manual
DESCRIPTION
The APX480M uses an unregulated MOSFET power supply for superior
sound and output wattage.
In
addition, a toroid-coil is used to transfer
power with minimal performance loss due to heat.
To
avoid unwanted
noise, a double-sided conformal printed circuit board with strategically
placed components keeps AM RFI subdued.
All
of
the connections and controls for the APX480M are conveniently
located at the ends
of
the amplifier and labeled appropriately.
To
ensure
the best possible electrical connections, the power, speaker, and RCA
inputs are gold-plated. An additional benefit
of
this amplifier is the ability to
create a
2,
3,
or 4 channel amplified system with a flip
of
a switch (see
Application section).
In
the event
of
component failure or a short circuit, the
APX480M incorporates safe guards and an outboard ATC fuse to prevent
damage to the amplifier
INPUT CONNECTIONS AND AUDIO CONTROLS
The front panel
of
the APX480M contains both connections for RCA and
speaker level inputs, along with the audio controls as shown below.
CJ
0 INPUT
,GAIN,
EX~:~gER
CH1/2-MODE-CH3/4
PO
OWER
0 D
CH1
CH3 CH1/2 CH3/4 CH1/2
CH1/2
CH1
~ ~
2CH
STEREO
MONO MONO
~
}:~~~r~
re
e
:':~
:':~d,:~
~H
'~t
~.
c"EJil
",1"
'~4
,~:.~:
• e
CH3
2CH-IN e
BASS
MONO MONO
CH1
(BV~E~INPUT
:@CH4
l
a~ a~
CH1/2
FREQ
CH1/2FILTER
CH3/4FREQ
-
RANGE-
CH3/4 FILTER
c,,4i:
~
C; • e
\!) \!)
55
.110
LP
HP
OFF
55
.110
LP
HP
OFF
e •
~
(£)
CH2 CH4
:Q'"
t:Jj]
:Q'"
0:::::.
rn
-
(£)
~
C;1::::E:~~~~~~~~=t=~=I=~=t====1F==~F==~:::::::E~=:I~
Figure 1-
2 3
11
12 13 14 15
1.
CH
3/4 Speaker Level Input
2.
CH
1/2 RCA Level Input
3.
CH
3/4 RCA Level Input
4.
CH
1/2 Gain Control
5.
CH
3/4 Gain Control
6.
CH
1/2 Bass Extender
7.
Source Select
8.
CH
1/2 Mode Switch
9.
CH
3/4 Mode Switch
10.
CH
1/2 Speaker Level Input
11.
CH
1/2 Frequency Control
12.
CH
1/2 Crossover Mode Switch
13.
CH
3/4 Frequency Control
14. Frequency Range Multiplier
15.
CH
3/4 Crossover Mode Switch