McIntosh owner manual How to Operate the MC58, How to Operate with a Bridged Channel

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Figure 3

Figure 4

Figure 1

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.

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