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Caution: The Loudspeaker       Negative Connections are above chassis ground. Do not combine any connections together, ground them or connect with another MC611.

Connect the MC611 power 

cord to a live AC outlet. Refer 

to the rear panel to determine 

the correct voltage

POWER CONTROL IN 

receives turn On/Off 

signals from a McIntosh 

component

UNBALanced INput for an au-

dio cable from a Preamplifier or 

A/V Processor audio output

INPUT MODE switch selects between 

UNBALanced or BALanced Input

BALanced INput for audio 

cables from a Preamplifier or 

A/V Processor audio output

BALanced OUTput for 

an audio cable to the next 

Power Amplifier Input

OUTPUT Connections for 

a 2 ohm Loudspeaker

Rear Panel Connections and Switch

Fuse holder, refer to infor-

mation on the rear panel of 

your MC611 to determine 

the correct fuse size and 

rating

OUTPUT Connections for 

a 4 ohm Loudspeaker

OUTPUT Connections for 

an 8 ohm Loudspeaker

UNBALanced OUTput 

for an audio cable to the 

next Power Amplifier 

Input

POWER CONTROL OUT 

1 and 2 send turn On/Off 

signals to the next McIn-

tosh Component

AUTO OFF Mode 

Switch selects 

between ENAbled 

or DISabled

Summary of Contents for MC611

Page 1: ...McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 www mcintoshlabs com MC611 Quad Balanced Power Amplifier Owner s Manual...

Page 2: ...mportant Additional Operation Information Guide Thank You and Please Take a Moment 2 Technical Assistance and Customer Service 2 Table of Contents 2 General Information 2 Connector and Cable Informati...

Page 3: ...n the amplifier output stages and speaker loads of 2 4 and 8 ohms The Autoformers also provide perfect DC protection for your valuable loudspeakers Balanced and Unbalanced Inputs Balanced connections...

Page 4: ...cation for your MC611 Dimensions Front View of the MC611 Rear View of the MC611 Side View of the MC611 17 1 2 44 45cm 8 7 8 22 54cm 9 7 16 23 97cm 11 3 4 29 85cm 16 13 16 42 70cm 20 3 16 51 27cm 3 16...

Page 5: ...per ating temperature A custom cabinet installation should provide the fol lowing minimum spacing dimensions for cool opera tion Allow at least 6 inches 15 24cm above the top 2 inches 5 08cm below the...

Page 6: ...ced or BALanced Input BALanced INput for audio cables from a Preamplifier or A V Processor audio output BALanced OUTput for an audio cable to the next Power Amplifier Input OUTPUT Connections for a 2...

Page 7: ...tion 2 When multiple MC611s are used in a Ste reo or Multichannel System match up the Preamplifier or A V Processor Channel Output designation to each MC611 with Loudspeaker and the Loudspeaker loca t...

Page 8: ...of the cable end into the terminal side access hole and tighten the terminal cap until the cable is firmly clamped into the terminals so the lugs or wire cannot slip out Refer to figures 7 and 8 Note...

Page 9: ...from the MC611 Rear Panel and temporarily place them in a safe place Refer to figure 1 This McIntosh MC611 Quad Balanced Power Ampli fier is designed for Loudspeakers with an impedance of 2 ohms 4 ohm...

Page 10: ...he right side Refer to figure 6 14 Connect the Loudspeaker hookup cables to the MC611 Negative Output Terminal and Positive Output Terminal indentified as 2 ohms 4 ohms or 8 ohms connection to match t...

Page 11: ...11...

Page 12: ...ndicator POWER Switch Turns AC Power Off Remote AC Power On METER Switch selects the display modes of the Power Output Meter and Meter Illumination Meter indicates the Output of the amplifier LED indi...

Page 13: ...this power level until a higher power peak passes through the amplifier The meter point er will then rise to the newer higher indication If no further power peaks are reached the meter pointer will v...

Page 14: ...cIntosh MC611 Output Autoformer It provides low distortion power transfer at frequencies from below 20Hz to well beyond 20 000Hz with optimum impedance points of two ohms four ohms and eight ohms The...

Page 15: ...th an Autoformer Its frequency re sponse exceeds that of the output circuit itself and extends well beyond the audible range Its distortion level is so low it is virtually impos sible to measure exper...

Page 16: ...he possibility of ever overdriving the ampli fier into clipping Refer to figures 20 21 and 22 An overdriven amplifier can produce both audible and inaudible distortion levels exceeding 40 The audible...

Page 17: ...fuses a very important feature in a high power Home Systems employing multiple MC611 Power Amplifiers which is necessary for the wide dynamic range that Digital Audio demands Refer to figure 25 Power...

Page 18: ...pedance 22 000 ohms Balanced 22 000 ohms Unbalanced Voltage Gain 29dB 8 Ohms 26dB 4 Ohms 23dB 2 Ohms Power Guard Less than 2 Total Harmonic Distortion with up to a 14dB overdrive signal Power Control...

Page 19: ...shipping damage Use the original shipping carton and interior parts only if they are all in good serviceable condition If a shipping carton or any of the interior part s are needed please call or writ...

Page 20: ...cts is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice Printed in the U S A McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 www mcin...

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