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Your MC 2500 Stereo Power Amplifier 
can give you many years of 
satisfactory performance. If you 

have any questions, please contact: 

CUSTOMER SERVICE 

Mclntosh Laboratory Inc. 

2 Chambers Street 

Binghamton, New York 13903-9990 

Phone: 607-7233512 

Contents 

SERVICE CONTRACT INFORMATION 1 

INSTALLATION 2 

HOW TO CONNECT 3 

FRONT PANEL INFORMATION 8 

REAR PANEL INFORMATION 10 

PERFORMANCE LIMITS 12 

PERFORMANCE CHARTS 13, 14 

TECHNICAL DESCRIPTION 15 

BLOCK DIAGRAM 17 

MclNTOSH THREE YEAR SERVICE CONTRACT 

An application for A THREE YEAR SERVICE CONTRACT is included with this manual. 

The terms of the contract are: 

1  Mclntosh will provide all parts, materials 

and labor needed to return the measured 

performance of the instrument to the 

original performance limits. The SER-

VICE CONTRACT does not cover any 

shipping costs to and from the authoriz-
ed service agency or the factory. 

2. Any Mclntosh authorized service agency 

will repair Mclntosh instruments at nor-

mal service rates. To receive service 
under the terms of the SERVICE CON-

TRACT, the SERVICE CONTRACT CER-
TIFICATE must be presented when the 

instrument is 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 CONTRACT will be cancelled. 

Damage by improper use or mishandl-
ing is not covered by the SERVICE 

CONTRACT. 

4. The SERVICE CONTRACT is issued to 

you as the original purchaser. To pro-
tect you from misrepresentation, this 

contract cannot be transferred to a se-
cond owner. 

5. To receive the SERVICE CONTRACT, 

your purchase must be made from a 

Mclntosh franchised dealer. 

6. Your completely filled in application for 

the SERVICE CONTRACT must be post-

marked within 30 days of the date of 
purchase of the instrument. 

7. To receive the SERVICE CONTRACT, all 

information on the application must be 

filled in. The SERVICE CONTRACT will 

be issued when the completely filled in 

application is received by Mclntosh 

Laboratory Incorporated in Binghamton, 

New York. 

8. Units in operation outside the United 

States and Canada are not covered by 
the Mclntosh Factory Service Contract, 

irrespective of the place of purchase. 

Nor are units acquired outside the 

U.S.A. and Canada, the purchasers of 

which should consult with their dealer 

to ascertain what, if any, service con-
tract or warranty may be available locally. 

Copyright 1981 © by Mclntosh Laboratory Inc. 

-1-

Take Advantage of 3 years 
of Contract Service... 

Fill in the Application NOW. 

Summary of Contents for MC 2500

Page 1: ...Price 2 00 Reading Time 32 Minutes THE MclNTOSH MC 2500 STEREO POWER AMPLIFIER...

Page 2: ...aced on can support the weight 5 The amplifier cooling fans can be thermostatically controlled when the fan switch on the rear panel is placed in the thermally switched positions When so operated the...

Page 3: ...rvice done by a Mclntosh authorized service agency If the instrument is modified or damaged as a result of unauthorized repair the SERVICE CONTRACT will be cancelled Damage by improper use or mishandl...

Page 4: ...y high operating tempera tures The direct benefit of adequate ventilation is longer trouble free life The heat generated in the operation of the MC 2500 is exhausted from the unit by two temperature c...

Page 5: ...tereo operation STEREO LOAD OHMS VOLTS 1 22 4 2 31 6 4 44 7 8 63 2 STEREO OPERATION CONNECT LOW SIDE OF LOADS TO TERMINALS LEFT COM COM COM COM RIGHT COM COM COM COM CONNECT HIGH SIDE OF LOADS TO TERM...

Page 6: ...ation Make all speaker connections at the amplifier on ly For multiple speaker operation parallel the leads from the speakers to the amplifier AC POWER The MC 2500 is designed to operate on 120 volts...

Page 7: ...Stereophonic Connections 5...

Page 8: ...Mono Bridge Connections 6...

Page 9: ...Mono Parallel Connections 7...

Page 10: ...h channel Ordinary meters lack the capability of indi cating the short interval information in a sound wave The mass of the meter movement is too great to respond to the nearly instantaneous changes i...

Page 11: ...fier output clipping is eliminated Clipping is caused when an amplifier is asked to produce more power output than it can de liver with low distortion Amplifiers are capable of delivering large quanti...

Page 12: ...operate in three modes Stereo Mono Bridge and Mono Parallel The Mono modes differ in the loads they will drive and the connection sequence to the speaker terminals A connection chart appears on the re...

Page 13: ...ns will continue to operate When the amplifier has cooled it will automatically turn on again AC POWER The MC 2500 is designed to operate on 120 volts 50 60 Hz The amplifier draws 15 amperes line cur...

Page 14: ...er side is grounded RATED POWER BAND 20 Hz to 20 000 Hz TOTAL HARMONIC DISTORTION STEREO 0 02 maximum harmonic distortion at any power level from 250 milliwatts to 500 watts per channel from 20 Hz to...

Page 15: ...Performance Charts 13...

Page 16: ...14...

Page 17: ...e differential pair is adjustable Cor rect adjustment allows the lowest possible distor tion at low frequencies A current mirror circuit com bines the differential outputs into one signal which is the...

Page 18: ...cted sili con diode pair as feedback elements These diodes have a uniform logarithmic characteristic over an 80 dB range Only 60 dB of this logarithmic range is us ed in the MC 2500 The full wave rect...

Page 19: ......

Page 20: ...2 CHAMBERS ST BINGHAMTON N Y 13903 9990 607 723 3512 The continuous improvement of its products is the policy of Mclntosh Laboratory Incorporated who reserve the right to improve design without notice...

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