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17

Technical Description, con’t

Power Supply

Figure 16

Figure 14

Without Power Guard

Figure 15

With Power Guard

Figure 13

Input Test Signal

engineers know how to do it right.

Protection Circuits

The MCC602TM incorporates it’s version of the McIntosh

Sentry Monitor output transistor protec-

tion circuit. Refer to figure 12. There is

absolutely no compromise in sonic per-

formance with this circuit, and it ensures

safe operation of the amplifier under

even the most extreme operating condi-

tions. The different types of protection

circuits incorporated in the MCC602TM

insure a long and safe operating life.

This is just one of the many characteris-

tics of McIntosh Power Amplifiers that

make them world famous.

The MCC602TM also includes the

unique patented McIntosh POWER

GUARD circuit. Power Guard elimi-

nates the possibility of ever overdriving

the amplifier into clipping. Refer to fig-

ures 13, 14 and 15. An overdriven am-

plifier can produce both audible and in-

audible distortion levels exceeding

40%. The audible distortion is unpleas-

ant to hear, but the inaudible ultrasonic

distortion is also undesirable, since it

can damage valuable loudspeaker sys-

tem tweeters. You will never experience

the harsh and damaging distortion due to

clipping.

The POWER GUARD circuit is a

waveform comparator, monitoring both

the input and output waveforms. Under

normal operating conditions, there are no differences be-

tween the shape of these waveforms. If an amplifier chan-

nel is overdriven, there will be a difference between the

two signal waveforms. When the difference exceeds 0.3%

(equivalent to 0.3% harmonic distortion), the POWER

GUARD activates the PG light and a dynamic electronic

attenuator at the amplifier input reduces the input volume

just enough to prevent any further increase in distortion.

The POWER GUARD circuit acts so fast that there are ab-

solutely no audible side effects and the sonic purity of the

music reproduction is perfectly preserved. The

MCC602TM Power Amplifier with POWER GUARD is

not limited to just the rated power output, but will actually

produce distortion free output well above its rated power

due to the McIntosh philosophy of conservative design.

Power Supply

The high efficiency Pulse Width Modulation Regulated

Power Supply operates with 85% efficiency and features

MOSFET power transistors switching at 40KHz. Refer to

figure 16. The power supplies are independent for each

channel. Regulation is maintained from 12 to 16 volts at

the battery input. The turn-on inrush current is cushioned,

by a soft start circuit in the power supply which eliminates

component stress during turn-on.

Accidental blockage of the cooling intake port or some

other fault condition could cause the amplifier temperature

to continue to rise, even with the fan at full speed. A tem-

perature sensing circuit in the power supply will reduce

heat dissipation by lowering the voltage to the amplifier. If

cooling is still not sufficient, additional heating will shut

down the power supply completely. The fan will continue

to run and once normal temperatures are restored, opera-

tion will resume.

www.freeservicemanuals.info

5/10/2017

Digitized in Heiloo Netherland

Содержание MCC602TM

Страница 1: ...ratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 FAX 607 724 0549 Owner s Manual MCC602TM MCC602TM Power Amplifier www freeservicemanuals info 5 10 2017 Digitized in Heil...

Страница 2: ...paying particular attention to the point where they enter the instrument Care of Equipment 14 Clean only with dry cloth 15 Do not permit objects or liquids of any kind to be pushed spilled and or fal...

Страница 3: ...1545 Fax 607 723 3636 Safety Instructions 2 Thank You 3 Please Take a Moment 3 Customer Service 3 Table of Contents 3 General Notes 3 Introduction 4 Performance Features 4 Dimensions 5 Installation 6...

Страница 4: ...th the built in cooling fans will activate The Power Guard LEDs will both continuously indicate On and no sound will be heard When the temperature of the MCC602TM has returned to a safe condition soun...

Страница 5: ...on the next page pertaining to installing the MCC602TM into your vehicle Dimensions Top View of the MCC602TM Side View of the MCC602TM 26 7 8 68 3cm 3 11 16 8 05cm 10 1 32 25 46cm 16 7 8 42 89cm 2 15...

Страница 6: ...ated under a seat if adequate clearance is available The pre ferred installation method is to mount the am plifier directly to the vehicle main frame us ing the hardware supplied with the amplifier It...

Страница 7: ...r 8 ohm loudspeakers CHANNEL 2 OUTPUT Connections for 2 4 or 8 ohm loudspeakers BALANCED INPUT for audio cables from control center audio outputs CHANNEL 1 UNBALANCED INPUT for audio cables from contr...

Страница 8: ...ork Input Termi nal Connect the CHANNEL 2 OUTPUTs to the sec ond Crossover Network in a similar manor 4 Connect the cables from the Crossover Network to the respective Woofer Midrange Terminals for bo...

Страница 9: ...onnect for Two Channels Right Tweeter Right Woofer Midrange Right Crossover Network 4 Ohms Left Crossover Network 4 Ohms Vehicle Battery Fuse www freeservicemanuals info 5 10 2017 Digitized in Heiloo...

Страница 10: ...ork 7 Connect audio cables from the McIntosh Crossover Network SUB OUTPUT to the MCC602TM 2 MONO Input Note Do not connect a cable to the LEFT input 8 Connect the MCC602TM DC input terminals to the ve...

Страница 11: ...11 How to Connect for Mono Parallel Vehicle Battery Fuse Woofer 4 Ohm Woofer 4 Ohm www freeservicemanuals info 5 10 2017 Digitized in Heiloo Netherland...

Страница 12: ...hts when the Power Guard Circuit activates for Amplifier Channel 1 CHANNEL 2 METER indicates the Channel 2 Power Output CHANNEL 2 POWER GUARD LED lights when the Power Guard Circuit activates for Ampl...

Страница 13: ...Controls can be set for any sensitivity from 1 volts to 8 volts Refer to figure 4 Note When used in conjunction with a McIntosh control center you may find setting the Sensitivity controls to the cen...

Страница 14: ...ur hand under Temporarily place the removed glass panel in a safe place remove the suction cup and save it for future use 4 Remove the Phillips Screws holding the End Caps on both sides of the amplifi...

Страница 15: ...contribute to Technical Description Inside the MCC602TM the extremely low distortion performance expected from a McIntosh amplifier The typical McIntosh owner would never accept the approximately 100...

Страница 16: ...life Block Diagram of both Amplifier Channels Figure 11 Figure 12 expectancy for the amplifier The Autoformer creates an ideal match between the power amplifier output stage and the loudspeaker Refer...

Страница 17: ...re will be a difference between the two signal waveforms When the difference exceeds 0 3 equivalent to 0 3 harmonic distortion the POWER GUARD activates the PG light and a dynamic electronic attenuato...

Страница 18: ...Headroom 1dB Frequency Response 0 0 25dB from 20Hz to 20 000Hz 0 3dB from 10Hz to 50 000Hz Sensitivity 1Volt balanced or unbalanced inputs A Weighted Signal To Noise Ratio 114dB 2V Intermodulation Di...

Страница 19: ...so will result in shipping damage Make sure that the Top Glass Panel is firmly secured to the chassis using the supplied hex head screws Use the original shipping carton and interior parts only if th...

Страница 20: ...McIntosh Part No 040730 McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 www freeservicemanuals info 5 10 2017 Digitized in Heiloo Netherland...

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