McIntosh MC 7300 User Manual

Й
jPOWER OUTPUT METERS
The
MC
7300
power
output
meters
respond
9596
full
scale
to
a
single
cycle
of
a
2,000Hz
tone
burst.
Both
voltage
and
current
are
electronically
measured
and
fed
to
a
special
circuit
that
accelerates
the
pointer
movement
in the
upward
direction.
When
the
meter
pointer
reaches
its
peak,
it
is
time
stretch-
ed
to
pause
just
long
enough
to
be
read,
and
then
drops.
The
upper
scale
on
the
meters
is
calibrated
in
average
watts
power,
and
the
lower
scale
in
decibels.
The
meter
calibration
marks
reading
from
right
to
left,
starting
at
the
300
watt
indication,
are
as
follows:
300
Watts,
(Indicated)
120
Milliwatts
120
60
60
30
(Indicated)
30
(Indicated)
12
12
6
6
3
(Indicated)
3
(Indicated
1.2
12
0.3
0.6
0.3 (Indicated)
Two
additional
calibration
marks
above
300
watts
аге
on
the
meters.
The
first
is
600
watts,
(+
Зав),
and
"the
second
is
1200
watts,
(+
6dB).
The
power
amplifier
cannot
produce
a
continuous
1200
watts
of
power,
but
can
produce
well
beyond
300
watts
on
program
peaks,
especially
into
lower
impedance
speaker
loads.
In
MONO
operation
the
two
meters
will
read
iden-
tical
power
levels.
The
total
mono
power
output
of
the
amplifier
will
be
the
sum
of
these
readings.
METER
WATTS/HOLD
In
the
METER
WATTS
position,
the
meters
respond
to
all
the
musical
information
being
produced
by
the
amplifier
and
read
to
an
accuracy
of
at
least
9596
of
the
power
output
of
either
amplifier
channel.
In
the
METER
HOLD
position,
the
meter
pointer
is
locked
to
the
highest
power
peak
in
a
sequence
of
peaks.
The
meter
is
electronically
held
to
this
power
.
level
until
another
higher
power
peak
passes
through
the
amplifier.
The
meter
pointer
will
then
rise
to
the
newer
higher
indication.
If
no
further
power
peaks
are
reached,
the
meter
pointer
will
very
slowly
return
to
its
rest
position
or
lower
power
level.
The
decay
rate
is
approximately
6dB
per
minute.
LEFT GAIN
Use
the
LEFT
GAIN
control
to
adjust
the
output
in
the
left
channel
to
the
desired
listening
level.
RIGHT/MONO GAIN
Use
the
RIGHT/MONO
САМ
control
to
adjust
the
output
in
the
right
channel
to
the
desired
listening
level.
When
the
amplifier
is
connected
for
monophonic
operation,
the
RIGHT/MONO
GAIN
control
is
used
to
control
the
combined
monophonic
outputs
of
both
channels.
FOR
THE
BEST
SIGNAL
TO
NOISE
RATIO
WHEN
USING
McINTOSH
PREAMPLIFIERS,
PLACE
THE
IN-
PUT
SENSITIVITY
SWITCH
ON
THE
REAR
PANEL
OF
THE
AMPLIFIER
TO
THE
2.5V
POSITION
AND
TURN
BOTH
FRONT
PANEL
GAIN
CONTROLS
TO
THE
MAX-
IMUM
OR
FULLY
CLOCKWISE
POSITIONS.
If
your
needs
require
more
input
sensitivity
from
the
amplifier,
slide
the
INPUT
SENSITIVITY
switch
to
the
1.4
volt
position
and
adjust
the
GAIN
controls
as
needed.
In
the
1.4
volt
position,
turning
the
gain
controls
halfway
will
result
in
the
same
amplifier
sen-
sitivity
as
the
2.5
volt
position
with
full
gain.
POWER
The
POWER
switch
turns
the
MC
7300
ON
or
OFF.
The
switch
does
not
control
the
auxiliary
AC
outlet
on
the
rear
panel.
If
you
wish
to
control
the
MC
7300
AC
power
from
another
source
such
as
a
preamplifier
or
switching
relay,
leave
the
switch
in
the
ON
position.
FRONT
PANEL
CONTROLS
11

McIntosh MC 7300 Specifications

General

Brand	McIntosh
Model	MC 7300
Category	Amplifier
Language	English