McIntosh MC-30 User Manual

INSTRUCTION MANUAL

McINTOSH MODEL MC-30

30 WATT POWER AMPLIFIER

Type A-116B

Serial #9E341 and above

MCINTOSH LABORATORY, INC

038-243

DESCRIPTION

The McIntosh Model MC-30 is a 30 watt high fidelity power amplifier designed for home en­tertainment systems and professional applications. The Model MC-30 is similar to the earlier
McIntosh Model A-116 30 watt amplifiers and includes all of the rigid electrical specifications
and features found in these earlier units plus: less than 1/3% harmonic distortion at any power
output up to 30 watts and at any frequency in the audio spectrum, 20 to 20,000 cps; less than

1/2% intermodulation distortion if instantaneous peak power is below 60 watts for any combin­ation of frequencies 20 to 20, 000 cps; and noise and hum level 90 db or more below rated output.
The famous McIntosh high efficiency output circuit is used to obtain the high standard of per­formance found in this amplifier.

The MC-30 maybe operated from any signal source delivering 0. 5 or more volts, or directly
from a McIntosh Audio Compensator or Pre-Amplifier, such as the Models C-8, C-4, C-104,
or C-108. Output impedances of 4, 8 and 16 ohms are provided for direct connection to loud-

speakers. Additional outputs for 166 ohms (70.7 volts) and 600 ohms are provided for use with
multiple speaker systems, lines, etc.

INSTALLATION

Location

The MC-30 should be located in a ventilated area. If the amplifier is housed in a cabinet or

other enclosure, holes should be provided for air circulation.

Input Connections

1. When a McIntosh Audio Compensator or other McIntosh pre-amplifier is used with the

MC-30, plug the pre-amplifier's output-power cord into the "Pre-Amp input" receptacle on the
MC-30 and turn the "gain" control fully counter clockwise. This receptacle supplies the re­quired plate and filament power to the pre-amplifier equipment as well as providing the neces-

sary audio connection.

For pre-amplifier installation and operation refer to the pre-amplifier's instruction manual.

2, When a signal source of 0. 5 volts or more is used to drive the amplifier, such as the

output from a tuner, tape recorder, or pre-amplifier, plug the source into the "0. 5 volt input"

pin jack receptacle or connect to the "0.5 volt" and "GND" screw terminals. Use the "gain"
control to obtain the desired operating level.