McIntosh MC58 - Manual (Page 13)

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How to Operate the MC58
How to Operate the MC58
Power On
To have the MC58 turn on or off when a multizone system
turns on or off, the front panel power switch must be left in
the on position and the rear panel
power control switch must be in
the remote position. For non-re-
mote operation, set the rear panel
power control switch to local and
use the front panel power switch
to turn the MC58 on or off as de-
sired. Refer to figure 1.
Note: There must be a power
control connection between
the MC58 and the McIntosh Multizone Control System
or Control Center in order for the remote power turn on
to function.
Input Level Controls
When using a McIntosh Multizone Control System or Con-
trol Center set all five level controls to the 2.5V position. If
a preamplifier or control center has a
1V output rating, set the controls to
the 1V position. If an increase or de-
crease in amplifier sensitivity is re-
quired for other applications, set the
controls as desired. Refer to figure 2.
Mode Switch
The Mode switch allows a pair of
MC58 channels to be used in three
different operating configurations.
Refer to figure 3.
Stereo: Each channel of a ste-
reo pair operates inde-
pendently as left and right stereo 50 watt am-
plifiers.
Bridged: A channel pair operates in bridged configura-
tion for a single monaural 100 watt amplifier.
Mono: Channel pair inputs are connected in parallel
resulting in identical outputs for each channel.
How to Operate with a Bridged Channel
The versatile McIntosh MC58 can be used in three differ-
ent Operating Modes. The four channel pairs can be used
in Stereo Mode to supply 50 watts of power to four zones
of a multizone system. Any of the four stereo pairs can be
set to Bridged Mode to supply 100 watts of power when
greater power is desired. The Mono Mode allows two
channels to supply identical mono audio to two separate
loudspeakers. A pair of MC58 channels in Bridged Mode
will produce 100 watts output into
an 8 ohm loudspeaker. Refer to fig-
ures 2, 3 and 4.
1. Set the Mode switch to the
Bridged position.
2. Adjust the Bridged Level control to the 2.5V position if
using a McIntosh Multizone System or Control Center.
3. Connect the cable from the signal source component to
the Bridged In jack.
4. Connect loudspeaker cables to the terminals marked (-)
and (+) Bridged.
Figure 1
Figure 3
Figure 2
Figure 4