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system. Almost all loudspeaker systems have their hot and common terminals color coded,

with red usually as hot or plus. The output signals of all Mclntosh power amplifiers are always

IN PHASE with the input signals.

The crosstalk between channels on the MC7100 is almost none existent, so each channel

can be used as a separate monophonic amplifier. An example would be one channel feeding

background music to a given area, and the other channel feeding a different program signal

to another area.

MONOPHONIC (BRIDGED) OPERATION

(SET THE MODE SWITCH TO MONO POSITION)
Connect a cable from the monophonic speaker COMMON terminal to the MONO - (Minus)

amplifier output terminal. Connect a cable from the speaker HOT terminal to the amplifier

MONO + (Plus) terminal.

The MC7100 amplifier monophonic output signal will be in phase with the input signal when

the speaker is connected as indicated.

It is recommended that speaker loads no lower than 8 ohms be used with the

amplifier in the bridged Monophonic configuration.

HOW TO CONNECT AC POWER

The MC7100 is designed to operate on 120 volts 50/60Hz current. Plug the power cord

into a switched AC receptacle on the back of a preamplifier or other accessory component.

The plug blades are polarized; so be certain the plug is fully inserted in the outlet to prevent

blade exposure. (The MC7100 has no AC power switch, so it must be switched on and off

by a preamplifier or other accessory component.) Make certain that the AC outlet used can

supply at least 6 amperes of current. The amplifier can draw up to 5 amperes from the AC

power line when both channels are producing rated power output.

The auxiliary AC outlet on the amplifier rear panel will provide up to 600 watts (5 amperes)

current, and is not fused or switched.

CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT CONNECT THE POLARIZED AC

PLUG ON THIS UNIT TO AN EXTENSION CORD OR OTHER AC OUTLET THAT IS NOT

DESIGNED TO ACCEPT POLARIZED PLUGS. THE PLUG MUST BE FULL Y INSERTED

TO PREVENT BLADE EXPOSURE AND MAINTAIN LINE POLARITY.

FUSE

A 5 ampere fuse protects the MC7100 circuits. This fuse does not protect the auxiliary

AC outlet.

FRONT PANEL

The front panel is the "Classic Mclntosh" black glass with back lighted nomenclature.

The RED AC power indicator as well as the teal colored panel nomenclature will illuminate

when AC power is on. The amber POWER GUARD indicators will flash whenever the POWER

GUARD circuit is activated.

HOW TO

CONNECT

OUTPUTS

9

Summary of Contents for MC7100

Page 1: ...MC7100 POWER AMPLIFIER ...

Page 2: ......

Page 3: ...MC7100 POWER AMPLIFIER ...

Page 4: ...vice personnel when A The power supply cord or the plug has been damaged or B Objects have fallen or liquid has been spilled into the instrument or C The instrument has been exposed to rain or D The instrument does not appear to operate normally or exhibits a marked change in performance or E The instrument has been dropped or the enclosure damaged 15 Servicing Do not attempt to service beyond tha...

Page 5: ...ation Mclntosh Laboratory provides a Service Contract to the original purchaser Your Mclntosh Authorized Service Agency can expedite repairs when you provide the Ser vice Contract with the instrument for repair SERVICE CONTRACT 4 INTRODUCTION 5 INSTALLATION 5 6 7 HOW TO CONNECT INPUTS 8 HOW TO CONNECT OUTPUTS 8 9 CONNECTING DIAGRAMS 10 SPECIFICATIONS 11 PERFORMANCE CHARTS 12 TECHNICAL DESCRIPTION ...

Page 6: ... service agency will repair all Mclntosh instruments at normal service rates To receive the free service under the terms of the service contract the ser vice contract certificate must accompany the instrument when taken to the service agency 3 Always have service done by a Mclntosh authorized service agency If the instrument is modified or damaged as a result of unauthorized repair the service con...

Page 7: ...ower amplifiers the famous patented Mclntosh POWER GUARD cir cuit is included You never have to be concerned with possible amplifier overdrive You will not experience amplifier clipping with its harsh speaker damaging distortion when playing wide dynamic range program sources such as compact discs Many other desirable features are included such as gold plated output terminals DC out put protection...

Page 8: ...ide the amplifier completely into the cabinet until the back side of its front panel is pressing gently against the front of the cabinet panel Turn the PANLOC buttons approximately one quarter turn clockwise to lock the amplifier into the cabinet Turn the buttons one quarter turn counterclockwise to unlock and remove the amplifier CUSTOM INSTALLATION 1 MARK THE CABINET FRONT PANEL Tape the plastic...

Page 9: ...e PANLOC shelves inside the cutout with the short flange against the front face of the cabinet panel Fasten the shelves by inserting two fillister head 6 32 screws through the holes in each of the PANLOC shelf flanges through the front panel and into the threaded receptacle on the mounting strips 6 INSTALL THE AMPLIFIER Guide the amplifier AC power cord through the panel opening to the back of the...

Page 10: ...lifier input sensitivity for the rated 100 watts output is 2 5 volts THE 2 5 VOLT SENSITIVITY SETTING IS RECOMMENDED FOR BEST OPERATION WITH A McINTOSH PREAMPLIFIER Turning the LEVEL controls fully on clockwise will give a higher amplifier sensitivity of 1 4 volts which may be required for other applications HOWTO CONNECT OUTPUTS SPEAKER CABLES Use high quality speaker cables since this is an impo...

Page 11: ... a switched AC receptacle on the back of a preamplifier or other accessory component The plug blades are polarized so be certain the plug is fully inserted in the outlet to prevent blade exposure The MC7100 has no AC power switch so it must be switched on and off by a preamplifier or other accessory component Make certain that the AC outlet used can supply at least 6 amperes of current The amplifi...

Page 12: ...OPHONIC CONNECTION LEFT SPEAKER 4 OR 8 OHMS RIGHT SPEAKER 4 OR 8 OHMS MUST BE IN STEREO POSITION FOR STEREO PROGRAMS PREAMPLIFIER 8 OHM SPEAKER MUST BE IN MONO POSITION FOR MONO PROGRAMS MONO INPUT SIGNAL 10 STEREO MONO STEREO MONO ...

Page 13: ...ROOM 8 ohms 1 7dB 4 ohms 2 1dB FREQUENCY RESPONSE 0 0 25dB from 20Hz to 20 000Hz 0 3 0dB from 10Hz to 100 000Hz INPUT SENSITIVITY 1 4 volts 2 5 volts at gain control center detent A WEIGHTED SIGNAL TO NOISE RATIO 95dB 115dB below rated output INTERMODULATION DISTORTION SMPTE 0 005 maximum if instantaneous peak power output does not exceed twice the out put power rating RATINGS WIDE BAND DAMPING FA...

Page 14: ...PERFORMANCE CHARTS 12 ...

Page 15: ...at protec tion circuits are desirable and necessary to prevent amplifier or loudspeaker damage due to abnormal circumstances The genius of Mclntosh engineering has resulted in protection circuits which have no effect or compromise on the normal performance of a power amplifier The SENTRY MONITOR circuit is a good example The MC7100 incorporates seven specific protection circuits to enhance its per...

Page 16: ...WER GUARD circuit acts as a waveform comparator monitoring both the input and output waveforms Under normal operating conditions there are no differences between these waveforms When an amplifier is overdriven beyond its maximum distortion free out put then there will be a difference between the two waveforms If the difference exceeds 0 3 equivalent to 0 3 harmonic distortion the amber POWER GUARD...

Page 17: ...BLOCK DIAGRAM 15 ...

Page 18: ...039942 ...

Page 19: ......

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