Instruction manual

the
octal
"Pre-Amp
input"
receptacle.
In
this
case
connect
the
input
lead
to
pin
#5
and
the
ground
lead
to
pin
#
1.
When
using
this
connection
the
source
must
not
have
a
DC
6utput
component.
Output
Connections
The
Mc-30
has
output
impedances
of
4,
8
and
16
ohms
available
at
either
the
screw
terminal
connector
or
the
output
socket.
In
addition,
a 600
ohm
output
(balanced
to
ground)
is
available
at
the
output
socket.
See
schematic
diagram
for
socket
connections.
It
is
important
that
the
loudspeaker
or
other
load
be
properly
matched
to
the
amplifier
if
best
performance
is
to
be
obtained.
Because
many
loudspeakers
do
not
have
voice
coil
impedances
exactly
matching
4,
8
and
16
ohms,
the
following
table
lists
suggested
connections
for
best
impedance
matching.
Speaker
Impedance
3.
2 to
6.
5
ohms
6.5
to
13
ohms
13 to 32
ohms
Connect
To
4
ohms
8
ohms
16
ohms·
WARNING:
Output
plugs
wired
for
McIntosh
20W-2
and
50W-2
amplifiers
must
not
be
used
with
the
Mc-30
without
rewiring
the
plug.
Power
Connections
The
Me-30
operates
from
any
110
to
130
volt
50-60
cycles
power
line.
(When
continuous
use
is
contemplated
on
120
to
130
line
volts
the
transformer
primary
should
be
re-connected
using
the
125
volt
tap.
)
When
the
Mc-30
is
used
with
McIntosh
Pre-Amplifier
equipment,
tuners,
or
other
associated
equipment
the
Mc-30
power
cord
is
plugged
into
the
receptacle
at
the
rear
of
these
units.
When
thus
connected
the
power
switch
of
these
units
controls
the
Mc-30.
ELECTRICAL
AND
MECHANICAL
SPECIFICATIONS
Power
Supply
Power
Consumption
117/125
volts,
50/60
cycles
135
watts
at
30
watts
output
105
watts
at
zero
signal
output
-2-