McIntosh MC 7270 Owner'S Manual Download Page 1 | Manualshive

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Summary of Contents for MC 7270

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Page 2: ...unting Mount the instrument in a wall or cabinet only as described in the owners manual 10 Water and Moisture Do not use the instrument near water for example near a bathtub washbowl kitchen sink laun...

Page 3: ...cable ground shall be connected to the grounding system of the building as close to the point of cable entry as practical ATTENTION POUR PREVENIR LES CHOCS ELECTRIQUES PAS UTILISER CETTE FICHE POLARI...

Page 4: ...ontract does not cover any shipping costs to and from the authorized service agency or the factory 2 Any Mclntosh authorized service agency will repair all Mclntosh instruments at normal service rates...

Page 5: ...real world of Digital Dynamics Range demand How to achieve the performance demanded which often lasts from minutes to only a few thousandths of a second and to achieve the goal economically is a real...

Page 6: ...smashes into the power amplifier When other amplifiers are similarly stressed they generate large quantities of discordant sounds destroying the real musicality of the reproduced instruments Note in...

Page 7: ...ance It is indeed possible for such circuits to cause substantial amounts of distortion and undesirable listening effects which is true of almost any protective circuit design The real genius of good...

Page 8: ...outline Before taking the next step make sure that the six A and B holes have been drilled 4 Saw the Panel Cutout Saw carefully on the inside of the penciled lines First make the two long cuts and the...

Page 9: ...d to either or both outputs the combined impedance must be calculated The combined impedance must be connected to the appropriate impedance tap Use this table to aid in selecting the correct impedance...

Page 10: ...ing Connect the speaker leads to the output ter minals as listed in this chart Load Impedance Connect the Connect the In Ohms Speaker Cables to Speaker Cables to 2 Left 1 Ohm Terminal Right 1 Ohm Term...

Page 11: ...OSITION FOR STEREO PROGRAMS RIGHT SPEAKER MONO BRIDGED CONNECTIONS CONNECTIONSFOR 8 OHM SPEAKER ILLUSTRATED CONNECTIONS SHOWN FOR MONO WHEN MODE SWITCH IS IN MONO BRIDGE POSITION CONNECTIONS 9 PROGRAM...

Page 12: ...thousandth of a second Ordinarily a meter pointer mov ing over its scale in such a short time could not be seen Mclntosh has developed circuits that drive the meters to respond to the short interval...

Page 13: ...le locks to the highest power peak in a sequence of peaks The meter is driven to maximum power electronically held there until a higher peak passes through the amplifier which moves the meter needle t...

Page 14: ...Power Guard circuit which 1 dynamically prevents power amplifiers from being overdriven into hard clipping 2 assures that the amplifier will produce its maximum output without in creased distortion 3...

Page 15: ...disconnected INPUT LEVEL The input sensitivity of the MC 7270 is 0 75 volts or 2 5V depending on the position of the INPUT LEVEL switch For the best signal to noise ratio when using Mcln tosh source e...

Page 16: ...MONIC DISTORTION STEREO 0 02 maximum harmonic distortion at any power level from 250 milliwatts to 270 watts per channel from 20 Hz to 20 000 Hz both channels operating MONO 0 02 maximum harmonic dist...

Page 17: ...QUENCY IN Hz 100 1k MC 7270 HARMONIC DISTORTION VS FREQUENCY AT RATED POWER MC 7270 FREQUENCY RESPONSE AT 1 WATT OUTPUT MC 7270 CHANNEL SEPARATION VS FREQUENCY OUTPUT IMPEDANCE 8 INPUT IMPEDANCE 1k 0...

Page 18: ...ORTION VS POWER OUTPUT BOTH CHANNELS DRIVEN FREQUENCY IN Hz 100 1k 10k MC 7270 POWER OUTPUT VS FREQUENCY 0 02 HARMONIC DISTORTION BOTH CHANNELS OPERATING INTO 8 OHMS 1 10 100 0 05 0 04 0 03 0 02 0 01...

Page 19: ...fier output signal is fed to the output terminals through the output autotransformer The Mclntosh design ed interleaved multifilar wound autotransformer is used to properly match the amplifier to ster...

Page 20: ...The operational amplifier provides a large amount of current so the peak holding capacitor can charge sud denly The charge on the peak holding capacitor is amplified in a two transistor DC amplifier...

Page 21: ...BLOCK DIAGRAM 19 MclNTOSH MC 7270 STEREO POWER AMPLIFIER...

Page 22: ...have always been designed to maintain the Mclntosh reputation for best sound for durability and for long life Mclntosh has since 1949 lead the industry in tech nological advancement Mclntosh has alwa...

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