SONY XM-404EQX user manual download (Page 4 of 16)

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Features
Maximum
power
output
of
80 watts
per
channel
(at
4
ohms).
• This unit
can be
used
as a bridging
amplifier
with a
maximum
output of
200 watts.
• Direct connections
can be made
with
the speaker
outputs
of
your car audio
if it is not equipped
with
the line output
(High
level input
connection).
• Low-pass
filter,
high-pass
filter,
and
five band
equalizer
circuit
are built-in.
• The DIRECT switch
can be used to bypass
the low
pass filter, high-pass
filter, and
equalizer
circuit
for
more enjoyable
high
quality
sound.
You can visually
confirm
the output
level of both the
left and
right
sides
with the power
level indicator.
Protection
circuit
and
indicator
provided.
• Pulse power
supply*
for stable, regulated
output
power.
Pulse
power
supply
This unit has a built-in power regulator
which
converts the
power supplied by the DC 12 V car battery
into
high speed
pubes
using
a
semtconductor
switch.
These pulses are
stepped up
by the
built-in
pulse transformer
and separated
into
both positive
and negative
power
supplies
before being
converted into direct current again. This
is
to regulate
fluctuating
voltage from the car battery.
This light weight
power
supply
system
provides
a
highly efflclent
power supply
with
a low impedance
output.
Location and Function of Controls
[]
POWER/PROTECTOR
indicator
OVER CURRENT
lights
up green
during
normal
operation.
The
color
will
change
from
green
to red
when
receiving
a
powerful
signal.
OFF SET lights
up
green
during
normal
operation.
The
color
will
change
from
green
to red when
the voltage
going
out
to the
speaker
terminal
or the
pin jack
is too
high.
THERMAL
lights
up
green
during
normal
operation.
The color
will change
from
green
to red
when
the
temperature
rises
to an unsafe
level.
The
color will
return
to
green
when
the temperature
returns
to
normal.
[]
Power level indicator
Indicates
the
output
levels
of both
the left
and
right
sides.
The
scale
is
calibrated
for use with
4
ohm
speakers.
[]
DIRECT switch
When
the
DIRECT
switch
is set to ON,
the
signal
does
not go through
the
low-pass
filter,
high-pass
filter
and
equalizer
circuit.
[]
LEVEL adjustment
control
The input
level
can be adjusted
with
this
control
when
using
source
equipment
made
by
other
manufacturers.
Turn
it to MAX
when
the
output
level
of
the
car
audio
seems
low.
To reduce
noise,
turn
the
LEVEL
control
(gain)
of
the
amplifer
to MIN! and
the volume
of the car
audio
up.
[]
FILTER selector switch
When
the
switch
is in the
LPF position,
the
filter is set to low-pass.
When
in
the
HPF
position,
the filter
is set to high-pass.
When
the DIRECT
switch
is set
to ON,
these
filters
do not
work.
[]
Cut-off
frequency
adjustment
control
Sets the
cut-off
frequency
(50-200
Hz) for the
low-pass
or high-pass
filters.
[]
EQUALIZER
level
control
You can
change
the
settings
of the five band
(50
Hz, 200 Hz, 800 Hz, 3.2 kHz,
12.8 kHz
) equalizer.
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