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VARIOUS REGULATORY AGENCIES REQUIRE THAT WE BRING THE FOLLOWING 

INFORMATION TO YOUR ATTENTION. PLEASE READ IT CAREFULLY. 

The Mclntosh MC 2500 is an ex-

tremely high power amplifier. 

Because of the high power available 

it is necessary to emphasize some 
prudent and safe operating condi-

tions. 

1. Loudspeakers can be damaged or 

destroyed by the high power 
available from the MC 2500. Never 
connect or disconnect inputs or 
outputs while the amplifier is turn-

ed on. 

2. Never operate the amplifier with 

the power cord plugged into an 
auxiliary AC power outlet on 
source equipment. The amplifier 
draws 15 amperes and can damage 

the source equipment. 

3. Do not operate the instrument plug-

ged into an ordinary extension 
cord. A heavy duty extension cord 
(14 ga. or heavier) is required. 

4. Be cautious when lifting the instru-

ment. It weighs 129 pounds. Make 

certain that what it is placed 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 
fans will not run when the amplifier 

is cool, as when the amplifier is 

first turned on. As heat develops, 

one or both fans will automatically 
turn on as conditions require. This 
operating behavior is normal. 

WARNING: TO PREVENT FIRE OR SHOCK 

HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN 

OR MOISTURE. 

The Mclntosh you have purchased is a Model 

MC 2500. It has a serial number located on the rear panel 

of the chassis. Record that serial number here: 

The model, serial number and purchase date are impor-

tant to you for any future service. Record the purchase 

date here: 

Upon application, Mclntosh Laboratory provides a 

Three-Year Service Contract. Your Mclntosh authorized 

Service Agency can expedite repairs when you provide 

the Service Contract with the instrument for repair. To 

assist, record your Service Contract number here: 

Serial Number 

Purchase date 

Service Contract Number 

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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