Marantz Sm-10 - Page 7

MARANTZ
MODEL
Ma-5
MONO
POWER
AMPLIFIER
power
amplifier
|
:
CLASSA
POWER / WATTS (80)
“Mao-5
3.8
15
|
15 30
| |
60
|
Ere@en Beem en z.
oo 9 ea epee heer rH
50
7
| | CLAsSsSB
75
120 200 300
FEATURES
@
High
power
—
120W
of
dynamic
“Marantz”
sound
(Class
B operation)
Front
the
line
input,
the
audio
signal
passes
to
the
dual
FETs
in
the
buffer
amp
and
then
to
the
first
stage
which
is
a
differential
amplifier
using
dual
transistors.
One
side
of
this
differential
output
is
phase
inverted,
while
the
output
of
the
buffer
amp
passes
to
a
pure
push-pull
amplifier
which
drives
the
final
output
stage.
The
power
amplifier
stage
uses
newly
developed
super
high
f7
power
transistors
in
parallel
three-stage
Darlington
connection.
This
makes
possible
handling
high
currents
with
sufficient
heat
radiating
capacity.
With
pure
Class
A
operation,
reproduction
of
music
is
fantastic
When
switched
to
pure
Class
A
operation,
output
power
is
30W
of
sound
without
a
trace
of
switching
distortion.
This
power
amplifier
is
ideal
for
handling
the
high
fre-
quencies
ina
multichannel
system.
12
point
LED
peak
power
meter
The
output
level
can
be
checked
from
the
LED
peak
power
meter
specially
designed
for
this
high
quality
power
amplifier.
This
power
meter
which
incorporates
a
logarith-
mic
compression
indication
circuit
means
that
the
output
level
can
be
monitored
for
both
high
level
and
low
level
outputs
without
switching
to
a
different
range.
Protective
circuit
which
does
not
degrade
tone
quality
The
overload
protective
circuit
detects
both
overvoltage
and
overcurrent
conditions,
while
in
the
area
of
safe
operation
(A.S.O.)
does
not
degrade
the
operation
of
the
drive
transistors.
The
protective
circuit
has
adaptable
characteristics
so
that
its
operation
does
not
interfere
with
the
program
and
its
operation
is
always
constant.
DC
amplification
provides
high
fidelity
waveform
trans-
mission
and
low
TIM
DC
amplification
makes
possible
circuitry
which
transmits
the
waveform
of
the
input
signal
with
total
accuracy;
especially,
at
low
frequencies
there
is
absolutely
no
phase
distortion.
When
used
with
high
quality
speaker
systems,
they
are
protected
against
pop
noise
from
the
pre-amp
due
to
damage,
etc.
by
separate
AC
and
DC
coupled
inputs.