McIntosh MC2KW audio amplifier
Contents
1. 20 laa 12 1 4 31 11cm 50 80cm _ 19 3 8 49 21cm 3 16 0 48cm 1 3 8 3 49cm 14 35 60cm 10 5 8 26 99cm Dimensions con t Top View of the MC2KW Output Module Top View of the MC2KW Power Module 17 1 4 43 82cm a Wa Na m z e 8 7 8 22 54cm t Mtintosh 8 1 16 20 48cm j Fi 17 1 4 43 82cm 3 _Jo 4 Mets amp e S 8 72. Cover Mounting Screw Location NS CS A eia ew wot ge B J BALANCED 120V j SO 60Hz POWER OUTBUT INPUTS INPUT UNBALANCED CONTROL MODE B m D ne BAL UNBAL our OUT Figure 9 g Top Cover Mounting Rear Cover Top Cover i Screw Locations 1 Mm aan e 0 e 1 L e e E N X N N N u T i EE m Figure 11 Figure 10 15 METER indicates the Power Output of the MC2KW Power Amplifier POWER GUARD LED lights when the MC2KW Power Amplifier POWER GUARD circuit activates 50 0 2 2 0 20 200 kw 2m _ 40 30 20 10 WATTS POWER GUARD 4K DECIBEL POWER OWTPUT MC2KW OUTPUT MODULE McIntosh METER Switch selects the display modes of the Power Output Meter Pilot Light Indicates when the MC2KW Output Module is connected to AC Power POWER Switch turns the MC2KW Power Am plifier Off Remote On Off
3. ar BK rouen suam 10 5 8 MC2KW Output Module POWER OUTPUT 26 99cm Front Panel Custom Cabinet Cutout MeIntosh Cabinet ae Cutout Opening for Custom Mounting Front Panel Opening c for Ventilation MC2KW Output Module o Side View in Custom Cabinet 2 Cutout Opening for Ventilation 277 1 Chassis Hs Spacers I SACRA X ge 14 172 1 32 36 83cm MC2KW Output Module 4 67cm 14 15 5 16 Bottom View in Custom Cutout Opening 35 56cm 38 91cm Cabinet for Ventilation Y 10 Installation con t 17 1 4 43 82cm 3 MC2KW Power Module Melnto sh Front Panel Custom Cabinet Cutout Cabinet Front 22 15 24cm Cutout Opening for Custom Mounting Panel Opening for Ventilation FA HH ELI MC2KW Power Module Side View in Custom Cabinet e P 2 Chassis NG Hs Spacers r da 14 1 2 21 82 36 83cm MC2KW Power Module 1 67cm 15 516 Bottom View in Custom 2 Cutout Opening 38 91cm Cabi
4. 5 DIMENSIONS Er 6 8 Installation RR 9 11 Connections Rear Panel Connections 2 12 Separate Sheet cort rm eme 1 1 How to Connect MC2KW for Power Control and Audio ERU RU EHE NE e IE 13 Separate Sheet sese Mc2A How to Connect a Loudspeaker to the MC2K W Output Module eh eter eret etn es 14 15 Separate Sheet occisa ee ice reiten Mc2B Front Panel Features MC2KW Output Module Front Panel Controls andiDIsplays itecto e ie meme ar RE 16 MC2KW Power Module Front Panel 17 Operation How to Operate the MC2KW Power Amplifier 18 Additional Information Technical Description sese 19 23 POLOS cn aun ren ee qaa aaa naa 24 27 Block Diagram ioter terat 28 29 SpecifiCatlOns ree RR CHER HERI OD e RH 30 Packing Instruction 31 Important Information and Introduction Important Information Ak AA a PC RRV RR qq Caution The MC2KW Power Module weight is 127 pounds 57 6 kilograms and the MC2KW Output Module weight is 123 pounds 55 8 kilograms It requires two or more persons to safely handle when moving the Power or Output Module 1 The MC2KW Power Amplifier consists of one MC2KW Output Module and two MC2KW Power Modules 2 The following Connecting Cable is available from the McIntosh Parts Dep
5. Power Amplifier way 0 02 20 20 200 2 rn AK gk POWER OUTPUT MC2KW Owner s Manual McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 FAX 607 724 0549 The lightning flash with arrowhead within an equilateral triangle is in tended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons WARNING TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN AM S RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR The exclamation point within an equilateral triangle is intended to alert the user to the presence of im portant operating and maintenance servicing instructions in the litera ture accompanying the appliance NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL To prevent the risk of electric shock do not remove cover or back No user serviceable parts inside IMPORTANT SAFETY INSTRUCTIONS PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with a dry cloth Do not block any ventilation openings Install in accordance w
6. and MC2KW Power Modules for the correct voltage Overall Dimensions MC2KW Output Module Width 1s 17 3 4 inches 45 09cm Height is 12 5 16 inches 31 27cm including feet Depth is 26 5 8 inches 62 54cm including the Front Panel Handles Knobs and Interconnect Cables MC2KW Power Module Width is 17 3 4 inches 45 09cm Height is 12 5 16 inches 31 27cm including feet Depth is 26 5 8 inches 62 54cm including the Front Panel Handles and Interconnect Cables Weight MC2KW Output Module 123 pounds 55 8 kg net 148 pounds 67 1 kg in shipping carton MC2KW Power Module 127 pounds 57 6 kg net 152 pounds 68 9 kg in shipping carton The Power Requirements listed are for each MC2KW Power Module two are required for each MC2KW Power Amplifier nterconnect Cables are supplied with the MC2KW Out put Module and both MC2KW Power Modules connect to the MC2KW Output Module Packing Instructions Packing Instructions ij In the event it is necessary to repack the equipment for ship ment the equipment must be packed exactly as shown be low It is very important that the four feet are attached to the bottom ofthe equipment This will ensure the proper equip ment location on the bottom foam pad Failure to do this will result in shipping damage Also to protect the finish of the glass and metal surfaces it is advisable to place the MC2KW Out
7. 4 ohms 63 3V across 2 ohms Output Load Impedance 8 4 and 2 ohms with three pairs of terminals each for im pedance Rated Power Band 20Hz to 20 000Hz Total Harmonic Distortion 0 005 maximum harmonic distortion at any power level from 250 milliwatts to 2000 watts 20Hz to 20 000Hz Dynamic Headroom 2dB Frequency Response 0 0 25dB from 20Hz to 20 000Hz 0 3dB from 10Hz to 100 000Hz Sensitivity 5 0 Volts Balanced Input 2 5 Volts Unbalanced Input A Weighted Signal To Noise Ratio 90dB Unbalanced 123dB below rated output 94dB Balanced 127dB below rated output Intermodulation Distortion 0 00596 maximum if instantaneous peak power output does not exceed 4000 watts for any combination of frequencies from 20Hz to 20kHz Wide Band Damping Factor Greater than 40 Input Impedance 10 000 ohms Power Guard Less than 2 THD with up to 14dB overdrive 30 Specifications General Specifications MC2KW Output Module Power Requirements 100 Volts 50 60Hz at 35 watts 110 Volts 50 60Hz at 35 watts 120 Volts 50 60Hz at 35 watts 220 Volts 50 60Hz at 35 watts 230 Volts 50 60Hz at 35 watts 240 Volts 50 60Hz at 35 watts MC2KW Power Module Power Requirements 100 Volts 50 60Hz at 1440 watts 110 Volts 50 60Hz at 13 0 amps 120 Volts 50 60Hz at 12 0 amps 220 Volts 50 60Hz at 7 5 amps 230 Volts 50 60Hz at 6 5 amps 240 Volts 50 60Hz at 6 5 amps Note Refer to the rear panels of the MC2KW Output Module
8. connect with another MC2KW Power Amplifier 6 Each of the MC2KW Power Modules needs to be connected to a dedicated AC Circuit with Outlet The type and size of the dedicated AC Circuit with Outlet needs to be in accorandance with the Local Electrical Wiring Codes Always contact your McIntosh Dealer and Certified Electrician for additional information and assistance The MC2KW Output Module should be connected to a third separate AC Circuit with Outlet The third AC Circuit with Outlet may also have other McIntosh and Non McIntosh Component s connected including additional MC2KW Output Modules 20 Amp 120Volt AC Circuit is for use in the United States and Canada only 4 7 The AC Power Cables going to the MC2KW Power Modules MC2KW Output Module and any other McIntosh Component s should not be connected to AC Power Outlets until all the system components are connected together 8 The MC2KW Power Amplifier mutes the speaker output for approximately two seconds when first turned on 9 In the event that either or both MC2KW Power Modules over heat due to improper ventilation and or high ambient temperature the protection circuits will activate The sound will be muted and the MC2KW Output Module Front Panel Power Guard LED will continuously indicate ON When the MC2KW Power Modules have returned to a safe operating temperature normal operation will resume 10 Each MC2KW Power Module connects to the MC2KW Output M
9. meter A front panel switch 1s provided to change the meter to the Watts Hold Mode of operation This allows fast upward movement of the pointer but greatly increases Hold Time at the peak of its travel The highest power output of the source material is thus recorded Protection Circuits The MC2KW Power Amplifier incorporates the McIntosh Sentry Monitor Output Transistor Protection Circuit Refer to Figure 22 There is abso lutely no com promise in sonic performance with this circuit and it ensures safe operation of the amplifier un Ogorsitdi Arse Output der even the Sentry Monitor most extreme Safety Arsa ESI operating condi Figure 22 21 tions The different types of protection circuits incorporated in the MC2KW Power Amplifier insure a long and safe op erating life This is just one of the many characteristics of McIntosh Power Amplifiers that make them world famous The MC2KW Power Amplifier also includes the unique patented McIntosh Power Guard circuit Power Guard eliminates the possibility of ever overdriving the amplifier into clipping Refer to figures 23 24 and 25 An overdriven amplifier can produce both audible and inaudible distortion levels exceeding 40 The au dible distortion is unpleasant to hear but the in audible ultra sonic distortion is also undesir able since it can damage valuable loudspeaker sys tem tweeters You will never experience the harsh and dam
10. who reserve the right to improve design without notice Printed in the U S A McIntosh Part No 04108100
11. 8 22 54cm 7 10 F 16 or Y t 8 116 20 48cm e Y Installation UR Rp p ttm nl The MC2KW Output Module and MC2KW Power Mod ules can be placed upright on a table or shelf standing on their four feet If the Output Module and the two Power Modules are to be stacked vertically the middle unit should be the Output Module There should be at least 6 inches 15 24 cm of space between the bottom of the upper Power Module and the top of Output Module Likewise there should be at least 6 inches 15 24 cm of space between the bottom of the Output Module and the top of lower Power Module The four feet may be removed from the bottom of the MC2KW Output Module and each of the MC2KW Power Modules when they are custom installed The four feet from each unit together with the mounting screws should be re tained for possible future use if the MC2KW Output Mod ule and MC2KW Power Modules are removed from a cus tom installation and used free standing again They also can be custom installed in a piece of furniture or cabinet of your choice The required panel cutout ventilation cutout and unit dimensions are shown Always provide adequate ventilation for the MC2K W Output Module and MC2KW Power Modules Cool opera tion ensures the longest possible operating life for any elec tronic instrument Do not install the units directly above a heat genera
12. Semiconductor are trademarks of Semiconductor Components Industries LLC 20 Technical Description Figure 18 anced configuration cancels even order distortion The out put signals from the two MC2KW Power Modules are coupled together in the unique McIntosh MC2KW Power Amplifier Output Autoformer It provides low distortion power transfer at frequencies from below 20Hz to well be yond 20 000Hz with optimum impedance points of two ohms four ohms and eight ohms The unequaled expertise of McIntosh in the design and manufacturing of autoformers is legendary in the high fidelity industry The high efficiency circuit design of the MC2KW Power Amplifier contributes to low operating temperatures More than 2 800 square inches of heat sink area for each MC2KW Power Module keep the Power Amplifier operat ing safely with convection cooling No fans are needed Re fer to figure 19 Figure 19 Autoformer All solid state power amplifier output circuits work best into what is called an optimum load This optimum load may vary considerably from what a loudspeaker requires In the case of more than one loudspeaker connected in parallel the load to the power amplifier may drop to two ohms or even less A power amplifier connected to a load that is lower than optimum causes more output current to flow which results in extra heat being generated in the power out put stage This increase in temperature will result in a re duced life ex
13. TS MONITOR 80 40 CASCODE VOLTAGE OUTPUT OUTPUT TRANSFORMER CASCODE VOLTAGE COUP SENTRY METER MONITOR DRIVER 7 NEGATIVE 2 FEEDBACK POWER POWER TRANSFORME SUPPLY HEATSINK TEMP MONITOR l I IR AMP PG PG CONTROL ATTENUATOR INDICATOR eats INPUT POWER POWER MODE _ TRANSFORMER SUPPLY f IN OUT NPUTS OUTPUTS UNBALANCED BALANCED MC2KW Power Amplifier Power Module A Output Module 28 MC2KW Power Amplifier Block Diagram POWER MODULE B SENTRY T VOLTAGE MONITOR CURRENT SOURCE CASCODE VOLTAGE SENTRY MONITOR NEGATIVE FEEDBACK HEATSINK TEMP MONITOR POWER POWER SUPPLY TRANSFORMER and Power Module B 29 Power Amplifier Specifications Power Output 2000 watts into an 8 4 or 2 ohm load is the minimum sine wave continuous average power output The output RMS voltage 1s 126 5V across 8 ohms 89 5V across
14. aging 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 between the shape of these waveforms If an amplifier channel is overdriven there will be a differ ence between the two signal wave forms When the difference ex ceeds 0 3 equivalent to 0 3 harmonic distortion the Power Guard ac tivates the PG light and a dy namic electronic attenuator at the amplifier input reduces the input Input Test Signal Figure 23 Without Power Guard Figure 24 22 Technical Description con t volume just With Power Guard enough to pre vent any further increase in dis tortion The Power Guard cir cuit acts so fast that there are ab solutely no au dible side effects and the sonic pu rity of the music reproduction is perfectly pre served The MC2KW 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 conserva tive design Figure 25 Power Supply Circuits To compliment the fully balanced design of the MC2K W Power Amplifier there is a high current high voltage power supply inside each of the MC2K W Power Modules The very large Power Transfomer has a toroidal windings on a toroidal core Refer to figure 26 the golf ball is fo
15. ally or has been dropped 15 Do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids such as vases are placed on the equipment 16 To completely disconnect this equipment from the a c mains disconnect the power supply cord plug from the a c receptacle 17 The mains plug of the power supply cord shall remain readily operable 18 This apparatus is capable of driving Loudspeakers even low efficienc es into producing extremely high sound pressure levels User caution is advised Ear protection is recommended when playing at high volumes as continued exposure to high sound pressure levels can cause permanent hearing impair ment or loss 19 Do not place the protective blue cloth cover on the equipment when the power supply cord is connected Thank You px s IVi Your decision to own this McIntosh MC2K W Power Ampli fier ranks you at the very top among discriminating music listeners You now have Best The McIntosh dedica tion to Quality is assurance that you will receive many years of musical enjoyment from this unit Please take a short time to read the information in this manual We want you to be as familiar as possible with all the features and functions of your new McIntosh Please Take A Moment The serial number purchase date and McIntosh Dealer name are important to you for possible insurance claim or future service The spaces be
16. an assist in determining the best location for the MC2KW Output Module and MC2KW Power Modules There is additional information on page 9 pertaining to installing the MC2KW Output Module and MC2KW Power Modules into cabinets 17 314 45 09cm 02 20 20 200 kw aM Re NE TPUT 1 1 i 1 2 5 1 6 Front View of the 27 94cm 31 27 MC2KW Output Module MeIntosh Y Y 17 1 4 43 82cm p Rear View of the 1 MC2KW Output Module jie ls D 12 1 4 31 11 SEL 20 50 80cm 1 5 8 E 3 19 3 0 4 12cm 49 21cm e Side View of the 10 5 8 MC2KW Output Module 3 16 26 99 0 48cm J i 1 3 8 14 3 49cm 1 9 16 35 60cm 3 96cm Front View of the MC2KW Power Module Rear View of the MC2KW Power Module 1 5 8 4 12cm Side View of the MC2KW Power Module 17 3 4 45 09cm E S et Mentosh WLY MC2KW POWER MODULE Dimensions 11 12 5 16 27 94cm 31 27 17 114 43 82cm
17. artment Power Control Cable Part No 170 202 Six foot 2 conductor shielded with two 1 8 inch stereo mini phone plugs Power Module to Output Module Cable Part No 171 745 Three foot shielded 21 conductor low current male to male custom cable one required between each MC2KW Power Module and MC2KW Output Module Power Module to Output Module Cable Part No 171 746 Three foot shielded 16 conductor high current male to male custom cable one required between each MC2KW Power Module and MC2KW Output Module Do not use any other cable when connecting the MC2KW Output Module to the MC2KW Power Modules These cables are for use only with the MC2KW Output Module and MC2KW Power Modules 3 For additional connection information refer to the owner 5 manual s for any component s connected to the MC2KW Power Amplifier 4 It is very important that loudspeaker cables of adequate size be used so that there will be no power loss The size is specified in Gauge Numbers or AWG American Wire Gauge The smaller the Gauge number the larger the wire size If your loudspeaker cables are 50 feet 38 1m or less use at least 12 Gauge If your loudspeaker cables are 100 feet 76 2m or less use at least 10 Gauge 5 The MC2KW Power Amplifier incorporates the very latest in Fully Double Balanced Circuitry As a result the Loudspeaker Negative 2 Connections are above chassis ground Do not combine any connections together ground them or
18. e achieved For those who have been searching for the Best in a Power Amplifier your wait is over Performance Features Performance Features Triple Chassis Mono Block Design For the first time the new McIntosh MC2KW Power Am plifier is capable of supplying the power required to repro duce the full dynamic range of a symphony orchestra in cluding pipe organ This includes driving low efficiency Loudspeakers in a large room to concert hall volume levels It can reproduce complex music with complete accuracy with no added distortion or noise The Triple Chassis De sign also allows for easier placement in a room than would be possible in a single chassis design yet with no compro mise in performance or reliability Power Output The MC2KW Power Amplifier is capable of 2 000 watts into 2 4 or 8 ohm speakers with less than 0 005 distor tion It can provide peak current of 200 amperes and over 8 000 watts of power output on music bursts Full Balanced Quad Differential Circuitry The MC2KW Power Amplifier is fully balanced from in puts to outputs It consists of two matched MC2KW Power Modules each operating in push pull with their outputs combined in a McIntosh Autoformer located in the MC2KW Output Module This double balanced configura tion cancels virtually all distortion Patented Power Guard The patented McIntosh Power Guard circuit prevents the amplifier from being overdriven into clipping with it
19. he 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 cannot slip out Refer to figures 4 5 amp 6 4 Connect the loud speaker hookup cable j to the output terminals Mw x 1 that match the imped di 1 icio _ ance of your loudspeaker being careful to observe the correct polarities Output impedance connections of 2 ohms 4 ohms and 8 ohms are provided If the imped ance of your loudspeaker is in between the available connections use the nearest lower impedance connec tion WARNING Loudspeaker terminals are hazardous live and present a risk of electric shock For additional instruction on making Loudspeaker Connections contact your McIntosh Dealer or McIntosh Technical Support 5 Re attach the previously removed Cover s making sure to route the Loudspeaker Cables between the top of the Stainless Steel Chassis and underneath the bottom Rear Cover Refer to figure 9 6 Connect the AC Power Cords to each ofthe MC2KW Power Modules and connect the plug end of each cord to dedicated active AC outlets Connect the remaing AC Power Cord to the MC2KW Output Module and con nect the plug end ofthe cord to a separate active AC outlet Refer to page 4 Important Information note 6 for AC Outlet How to Connect a Loudspeaker to the MC2KW Output Module es
20. ith the manufacturer s instructions 8 Do not install near any heat sources such as Q OQ radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over 13 Unplug this apparatus during lightning storms or when unused for long periods of time 14 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate norm
21. lifiers are used in the system the C1000 Tube Preamplifier Main Right Output Balanced connects to the remaining Balanced Input on MC2KW Output Module the Left Channel is connected in a similar manner 9 Proceed to page 14 for the connection of Loudspeaker s to the MC2KW Power Amplifier Me How to Connect a Loudspeaker to the MC2KW Output Module Caution The supplied AC Power Cords should not be connected to the Rear Panel of the MC2KW Output Module and both of the Power Modules until after the Loudspeaker Connections have been made and the supplied protective Terminal Connections Cover has been installed Failure to observe this could result in Electric Shock 1 This McIntosh MC2KW Power Amplifier is designed for the connection of a single Loudspeaker of either 2 ohms 4 ohms or 8 ohms impedance There are three sets of identical connection terminals A B and C for each im pedance to facilitate either bi cabling or tri cabling be tween the Amplifier and Loudspeaker Note The remaining Loudspeaker Terminals on the Amplifier should not be connected to another Loudspeaker 2 Using the supplied T shaped tool remove the two screws from the Rear Cover on the MC2K W Output Module and remove the cover Place the cover and screws in a safe location Refer to figures 9 and 10 Note The MC2KW Output Module Removable Covers consist of a Rear piece and Top piece In certain installations the removal of the Top Cover in additi
22. low have been provided for you to record that information Serial Number Purchase Date Dealer Name Technical Assistance If at any time you have questions about your McIntosh product contact your McIntosh Dealer who is familiar with your McIntosh equipment and any other brands that may be part of your system If you or your Dealer wish additional help concerning a suspected problem you can receive tech nical assistance for all McIntosh products at McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 Phone 607 723 1545 Fax 607 724 0549 Customer Service If it is determined that your McIntosh product is in need of repair you can return it to your Dealer You can also return it to the McIntosh Laboratory Service Department For as sistance on factory repair return procedure contact the McIntosh Service Department at McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 Phone 607 723 3515 Fax 607 723 1917 Copyright 2007 by McIntosh Laboratory Inc Safety Instructions Table of Contents Safety Instructions e Heec pe tdg 2 Thank You and Please Take a Moment 3 Technical Assistance and Customer Service 3 Table of Contehts ei frr eterni ANE retra ee 3 Important Information and Connector Information 4 Introduction eerie en techn ees rte qaa Waada 4 Performance Features 5 2 etit i m ee
23. net x for Ventilation Y Rear Panel Connections Rear Panel Connections The identification of Rear Panel Connections for the MC2KW Output Module and MC2KW Power Modules located on separate folded sheets contained in the Owner s Manual Packet 1 N I4 Ue on BO GUSSs WIRING MC2KW Output Module Esa m Refer to folded sheet Mc1A jen E MC2KW Output Module lt X a b o crassa WIRING s d a Rear Panel Connections Le o o CLASS 3 WIRING o 6 TO POWER MODULE B 1 2 INPUT UNBALANCED CONTROL MODE 5 6 63 9 9 4 5 co n i MC2KW Power Module Refer to folded sheet 1 MC2KW Power Module Rear Panel Connections TO OUTPUT MODULE TO OUTPUT MODULE 1 2 MeIntosh POW DULE 12 How to Connect the MC2KW for Power Control and Audio ig vr r cC How to Connect the MC2KW for Power Control and Audio connections These two pages contain information for connecting to gether the McIntosh MC2KW Output Module and the MC2KW Power Modules and that combination to the C1000 Preamplifier McIntosh Power Control connections allow for unified audio system operations one push button press to switch the entire system On or Off The connection instructions bel
24. ngle chassis design yet with no compro mise in performance or reliability A continuous average power output rating of 2 000 watts and with a peak output current of 200 amperes makes this not only the most advanced but also the most powerful amplifier McIntosh has ever manufactured The distortion limits for the MC2KW Power Amplifier are no more than 0 005 at rated power output for all frequencies from 20Hz to 20 000Hz Typical performance at mid fre 70001 Van MC2KW POWER MODULE SYSTEM SPECIFICATIO Top View of the MC2KW Power Module N 19 quencies 15 less than 0 00296 The true distortion readings on the MC2KW Power Amplifier are so low it takes special measuring techniques to make accurate readings The MC2KW Power Amplifier can deliver the best possible per formance from any type of high quality Loudspeaker Sys tem Creating an amplifier with this level of performance did not come easily Many months of design testing and mea suring were required Extensive controlled listening tests the ultimate form of measuring were made before the final design was accepted Design Philosophy The design philosophy incorporated in the MC2KW Power Amplifier involved several different techniques all based on sound scientific logic Every stage of voltage or current am plification must be as linear as possible prior to the use of negative feedback McIntosh Engineers know how to prop erly design negati
25. ntrol Main Jack to the POWER CONTROL IN Jack on the McIntosh MC2KW Output Module Right Channel Then connect another Power Control Cable from the McIntosh MC2KW Output Module Right Channel POWER CONTROL OUT Jack to the McIntosh MC2KW OUTPUT MODULE Left Chan nel POWER CONTROL IN In Jack Note There is approximately a one half second delay added to the Power Control Output Jack voltage in McIntosh Power Amplifiers to reduce the strain on the AC Power Line This will delay the Turn On of the second McIntosh Power Amplifier left channel in this system If there are additional McIntosh Power Amplifiers in the system connect the POWER CONTROL OUT Jack of the MC2KW OUTPUT MODULE Left Channel to the Power Control In on the next Power Amplifier 6 Connect a XLR Cable from the C1000 Preamplifier or Tube Preamplifier Main Right Output Balanced to one of the Balanced Inputs on MC2KW Output Module Right Channel Note Unbalanced Inputs and Outputs may optionally be used 7 Place the INPUT MODE Switch on the Rear Panel of the MC2KW Output Module to the BALanced position 1f Balanced Connections were utilized in step 6 If Un balanced Connections are used place the switch in the UNBALanced position 8 Ina similar manner connect a XLR Cable from the C1000 Preamplifier or Tube Preamplifier Main Left Output Balanced to one of the Balanced Inputs on the MC2KW Output Module Left Channel Note If both C1000P and C1000T Preamp
26. odule with two different supplied custom cables If both cables from each MC2KW Power Module are not connected correctly to the MC2KW Output Module the MC2KW Power Amplifier will not power up Refer to pages 12 and 13 for additional information on connecting the MC2KW Power Modules to the MC2KW Output Module Connector Information XLR Connectors Below is the Pin configuration for the XLR Balanced Input and Output Connectors on the MC2KW Output Module Refer to the diagram for connection PIN 1 Shield Ground Pin 2 PIN 2 Signal Pin 1 PIN 3 Signal Pin 3 Power Control Connectors The MC2KW Output Module Power Control Input and Output utilize a 5 volt signal There is an additional connection for control _ P s ve M ling illumination ofthe MC2KW Out Meter ES Illumination put Module Power Output Meter Use control jJj a 1 8 inch stereo mini phone plug to Ground connect to the Power Control Input on other McIntosh Components Introduction rc ee The MC2KW Power Amplifier with a Triple Chassis Mono Block Design is the most powerful and finest audio Power Amplifier McIntosh has ever created No design compro mises were allowed in the quest for a Power Amplifier with absolute accuracy total sonic purity and virtual elimination of distortion and audible noise It is capable of driving even the most inefficient Loudspeakers to live concert hall vol ume levels with a degree clarity never befor
27. on to the Rear Cover might provide easier access to the Output Connection Terminals refer to figures 9 10 and 11 3 Prepare the Loudspeaker Hookup Cable s for attach ment to the MC2KW Output Module Note Refer to page 4 Important Information note 3 for cable size Bare wire cable ends Carefully remove suffi cient insulation from the cable ends refer to fig ures 1 2 amp 3 If the cable Figure is stranded carefully twist the strands together as tightly as possible Notes 1 If desired the twisted ends can be tinned with solder to keep the strands together 2 Banana plugs are for use in the United States and Canada only In the United States when using the 8 ohm Loudspeaker Terminals it is mandatory to use banana plugs inserted into the top hole of the loudspeaker terminals in order to comply with safety standard requirements 0 5 inches 12 7 cm Figure 2 Figure 3 mms Connection Method for use inside the United States and Canada only Attach the previously prepared bare wire cable ends into the banana plugs and secure the connections Insert the banana 14 plug only into the hole at the top of the terminal Refer to figures A and B 7 Figure 7 7 m Figure 8 Connection Method for use I outside the United States and Canada Attach the previously prepared bare wire cable ends into the spade lug connectors and secure the connections Insert the spade lug connector or prepared section of t
28. or On MC2KW Output Module and MC2KW Power Module Front Panel Controls and Displays Illuminates when the MC2KW Power Module is On MC2KW POWER MODULE How to Operate the MC2KW Power Amplifier Power On With the POWER Switch set to the REMOTE Position the MC2KW Power Amplifier will turn On or Off when a McIntosh Preamplifier or A V Control Cen ter switches On or Off For manual operation rotate the POWER Switch to the ON or OFF Position as desired Refer to figure 12 Notes 1 There must be a power control connection between the MC2KW OUTPUT MODULE and the McIntosh Preamplifier or A V Control Center in order for the remote power turn on to function The MC2KW Power Modules will not switch On with the front Panel Illuminated unless they are connected to the MC2KW Output Module with the supplied custom hookup cables and the Output Module is switched On Figure 12 to Meter Selection Rotate the meter mode switch to select the meter operation mode desired Refer to figures 13 and 14 Note When the MC2KW is connected to a McIntosh Preamplifier with Remote Meter Illumination Control the illumination of Power Output Meter and McIntosh World Globe is controlled by the Preamplifier thus over riding the illumination On setting of Meter Selector Switch when set to the Watts or Hold Modes Lights Off Meter lights are turned off and the meter will continue to indi cate the po
29. osure Refer to figure 29 power surge of the next power amplifier occurs at a later Most time This helps prevent power circuit overload that could owners de trip circuit breakers or blow fuses a very important feature sire one when mutiple MC2KW Power Amplifiers are used power switch for the whole audio sys tem The MC2KW Power Am plifier is equipped with a cir Figure 29 23 OUTPUT MODULE POWER MODULE A ECL NN Mico POWER MODULE B MC2KW OUTPUT MODULE SYSTEM SPECIFICATIONS A OUTP Top View of the MC2KW Output Module Photos WATTS 0 02 o2 80 20 200 S KW M M K 30 20 50 0 DECIBELS POWER OUTPUT METER POWER WATTS REMOTE el MC2KW OUTPUT MODULE Front View of the MC2KW Output Module W POWER MODULE Front View of the MC2KW Power Module 25 CIRCUIT BREAKER e 26 TO OUTPUT MODULE 1 CLASS 3 WIRING CLASS 3 WIRING CLASS 3 WIRING BALANCED TO POWER MODULE B JT UNBALANCED 2 OUTPUT INPUTS iL MODE we BAL UNBA IN Rear View of the MC2KW Output Module TO OUTPUT MODULE 2 MeIntosh POWER MODULE McINTOSH LABORATORY INC BINGHAMTON NY MADE IN USA tts Rear View of the MC2KW Power Module Photos con t DECIBELS Angle View of the MC2KW Output Module Angle View of the MC2KW Power Module 27 POWER MODULE A OUTPUT MODULE EXC OUTPU
30. output impedances Precision Parts resistors are precision metal film type Low dielectric absorption film capacitors are used in all critical circuit lo cations Fiber Optic Solid State Front Panel Illumination The Illumination of the 1 2 inch thick laser etched Front Panel Glass is accomplished by the combination of custom designed Fiber Optic Light Diffusers and Light Emitting Diodes LEDs This provides even Front Panel Illumina tion together with the extra long life LEDs Glass Front Panel and Super Mirror Chassis Finish The famous McIntosh Illuminated Glass Front Panel with a Stainless Steel Chassis with Super Mirror Finish ensures the pristine beauty of the MC2KW will be retained for many years Machined Top and Side Panels The Top and Sides of the MC2KW Output and Power Mod ules are machined from thick aluminum panels with a smooth black anodized finish There is a screened glass panel in the recessed areas of the Top Panel with a block diagram of the Circuitry Special Power Supplies The MC2KW Output Module utilizes a special R Core Power Transformer together with an electronically fully regulated Power Supply Circuitry The MC2KW Power Modules each utilize a large Toroidal Wound Power Trans former with large filter capacitors capable of storing 430 Joules of energy Dimensions pem M i The following dimensions c
31. ow together with the In put and Output Connection Diagrams located on the sepa rate folded sheet Mc2A an example of a typical au dio system The following steps also include connections from the McIntosh Preamplifier Right Channel Main Audio Output to the MC2KW Power Amplifier Right Channel The second MC2KW Power Amplifier Left Channel Au dio is connected in a similar manner Your system may vary from this however the actual components would be connected in a similar manner For additional information refer to Connector and Cable Infor mation on page 4 1 Connect one of the supplied custom 16 Conductor Cables from the MC2KW Output Module TO POWER MODULE A Connector 1 to the MC2KW Power Module A Connector 1 Note After the cable connector is firmly seated into the chassis socket rotate the locking collar clockwise until it is tight do not over tighten 2 Ina similar manner connect the supplied custom 21 Conductor Cable from the MC2KW Output Module TO POWER MODULE A Connector 2 to the MC2KW Power Module Connector 2 Connect the remaining custom 16 Conductor Cable from the MC2KW Output Module TO POWER MOD ULE B Connector 1 to the MC2KW Power Module B Connector 1 4 Ina similar manner connect the remaining custom 21 Conductor Cable from the MC2KW Output Module TO POWER MODULE B Connector 2 to the MC2KW Power Module B Connector 2 5 Connect a Power Control Cable from the C1000C Power Co
32. pectancy for the amplifier The special Balanced Dual C Core Autoformer creates an ideal match between the power amplifier output stage and the loudspeaker Refer to figure 20 A McIntosh ampli fier with an Autoformer can be used to safely drive multiple Figure 20 speakers without reducing the life expectancy of the power amplifier There is absolutely no performance limitation with an Autoformer Its frequency response exceeds that of the out put circuit itself and extends well beyond the audible range Its distortion level is so low it is virtually impossible to measure In the rare event of a power amplifier output circuit fail ure the McIntosh Autoformer provides absolute protection from possible damage to valuable loudspeakers The un equaled expertise of McIntosh in the design and manufac turing of Autoformers is legendary in the high fidelity indus try McIntosh Engineers know how to do it right Power Output Meter The McIntosh MC2KW Power Amplifier has a huge hand built Output Watt Meter that responds 95 full scale to a single cycle tone burst at 2kHz Refer to figure 21 Voltage Figure 21 and current output are electronically measured multiplied and fed to a special circuit that accelerates the pointer movement in the upward direction When the pointer reaches its peak it pauses only long enough for the human eye to perceive its position then drops It is almost 10 times faster than a professional VU
33. put Module and the MC2KW Power Modules into the orginal protective cotton blue bag before placing them into the shipping carton Note Unless instructed otherwise please return the McIntosh Custom Interconnect Cables along with the MC2KW Power Amplifier Use the original shipping carton and interior parts only if they are all in good serviceable condition If a shipping car CARTON TOP TOP Y FOAM PAD FOAM RING 3 lt UNIT WITH 4 FEETON BOTTOM COVER PROTECTIVE BLUE CLOTH COVER BOTTOM FOAM PAD CARTON BOTTOM IMPORTANT Read Above ton or any of the interior part s are needed please call or write Customer Service Department of McIntosh Labora tory Please see the Part List for the correct part numbers Note The McIntosh MC2KW Output Module and MC2HW Power Module use the same shipping carton Quantity Part Number Description 1 034104 Shipping carton bottom 1 034105 Shipping carton top 1 034356 Protective blue cloth cover 4 018445 Feet 3 034349 Foam ring 2 034349 Foam pad top and bottom 1 034341 Shipping carton for interconnect cables CABLE CARTON MCINTOSH CUSTOM INTERCONNECT CABLES USE BANDING STRAPS AS SEAL WITH PACKAGING TAPE 31 McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated
34. r Guard Light driven by the Power Guard Circuitry under normal conditions will only illuminate momen tarily during extremely loud peaks in the music This occurs when the MC2KW Power Amplifier is being asked to de liver a power level way beyond its rated 2 000 watt output Refer to figure 16 In the event that either or both MC2KW Power Modules over heat due to improper ventilation and or high ambient temperature the protection circuits will activate The sound will be muted and the MC2KW Output Module Front Panel Power Guard LED will continuously indicate ON When the MC2KW Power Modules have returned to a safe operating temperature normal operation will resume Figure 16 Technical Description McIntosh Laboratory the company who introduced the world s first amplifier that could be called High Fidelity has done it again The McIntosh engineering staff has cre ated a power amplifier without compromise using the most advanced McIntosh circuit design concepts For the first time the new McIntosh MC2KW Power Amplifier is capable of supplying the power required to re produce the full dynamic range of a symphony orchestra including pipe organ This includes driving low efficiency Loudspeakers in a large room to concert hall volume levels It can reproduce complex music with complete accuracy with no added distortion or noise The Triple Chassis De sign also allows for easier placement in a room than would be possible in a si
35. r size comparsion It is enclosed in the legendary McIntosh Pot ted Enclosures and weighs over 26 6 pounds 12 06kg at gant Figure 26 The super size main filter capacitors can store over 430 Joules of energy necessary for the wide dynamic range that Technical Description con t E music demands and guarantees an excellent signal to noise cuit that provides remote Power Control from a McIntosh ratio Refer to figure 27 Preamplifier or A V Control Center When the Preamplifier or A V Control Center is switched On a digital 1 45V signal changes the operational state of digital control cir cuitry and a DC voltage is sent to each MC2KW Power Module to activate the power relay The two MC2KW Power Modules return an acknowledgment signal to the digital control circuitry and the MC2KW Output Module is then allowed to switch On Refer to figure 30 Figure 27 The MC2KW Output Module contains the low voltage regulated power supplies for each of the MC2KW Power Modules and for the Input Audio circuitry located inside the MC2KW Output Module Refer to figure 28 The special Figure 30 Figure 28 The MC2KW Power Amplifier also has a remote Power R core transformer supplies the necessary voltage current Control Out Jack The Power Control signal from this jack for the low voltage regulated circuitry and is housed in a Is delayed by a fraction of a second so that the turn on shielded encl
36. s harsh distorted sound that can also damage Loudspeakers Patented Sentry Monitor and Thermal Protection McIntosh Sentry Monitor power output stage protection cir cuits ensuring each MC2KW Power Module will have a long and trouble free operating life Built in Thermal Pro tection Circuits guard against overheating Patented Autoformer McIntosh designed and manufactured Output Autoformers provide an ideal match between the amplifier output stages and speaker loads of 2 4 and 8 ohms The Autoformers also provide perfect DC protection for your valuable Loudspeak ers Illuminated Power Meter The Illuminated Power Output Watt Meter is peak respond ing and indicates the true power output of the amplifier The Peak Watt Hold Mode allows the meter to temporarily stay at the highest power output and then slowly decay Power Control The McIntosh Power Control Circuit allows for remote turn on of the MC2KW Power Amplifier from a McIntosh Audio Video Control Center or Preamplifier If any addi tional McIntosh Power Amplifiers are part of the system there is a delayed Power Control Output This delayed trig ger reduces the strain on the house s electrical wiring and protection devices Balanced Inputs and Gold Plated Outputs Balanced connections guard against induced noise and al low long cable runs without compromising sound quality There are three sets of gold plated five way binding posts for each of the three
37. ting component such as other high powered am plifiers If all the components are installed in a single cabi net a quiet running ventilation fan can be a definite asset in maintaining all the system components at the coolest pos sible operating temperature A custom cabinet installation should provide the follow ing minimum spacing dimensions for cool operation For the MC2KW Output Module allow at least 2 inches 5 08 cm above the top 2 inches 5 08cm below the bottom and 1 inch 2 54 cm on each side so that airflow is not ob structed The air spaces for the MC2KW Power Module include at least 6 inches 15 24cm above the top 2 inches 5 08cm below the bottom and 2 inches 5 08cm on each side so that airflow 1s not obstructed Allow 25 inches 63 5cm depth behind the front panel for Interconnect Cables Allow 1 inch 2 54 cm in front of the mounting panel for clearance When the MC2KW Output Module and MC2KW Power Modules are to be installed in custom cabi nets refer to illustrations that follow Be sure to cut out a ventilation hole in the mounting shelf according to the di mensions in the drawing nterconnect Cables are supplied with the MC2KW Power Amplifier They are used to connect to the MC2KW Output Module with the two MC2KW Power Modules Installation 17 1 4 43 82cm WATTS O8 2 0 20 200 2m 40 gt 30 DECIBEL AK 0
38. ve feedback circuits so they contribute to the extremely low distortion performance expected from a McIntosh Amplifier The typical McIntosh owner would never accept the approximately 100 times higher distortion of many non feedback designs All transistors are selected to have nearly constant cur rent gain over the entire current range they must cover The 48 Power Transistors used in each MC2KW Power Module Output Circuitry have matched uniform cur rent gain high current bandwidth product and a large active region safe operating area These Power Transistors are the very latest in semiconductor technology and incorporate a new design known as ThermalTrak Refer to figure 17 This allows for the instantaneous and accurate monitoring of the Power Transis tor Temperature Each of the MC2KW Power Modules has a specially designed bias circuit to take full advantage of the ThermalTrak Power Transis tors and thus precisely controls the power amplifier opera tion over a wide range of music conditions with the benefits of lower distortion and cooler operation Precision metal film resistors and low dielectric absorption film capacitors are used in all critical circuit locations Each of the tvo MC2KW Power Modules utilizes a Double Balanced Push Pull design used from input to out put Each half of the amplifier contains complimentary bal anced circuitry Refer to figure 18 The resulting double bal Figure 17 ThermalTrak and ON
39. wer output Watts The meters re spond to all the musical informa tion being pro duced by the am plifier They indicate to an accuracy of at least 95 ofthe power output with only a single cycle of a 2000Hz tone burst Hold The meter pointer is locked to the highest power peak in a sequence of peaks It is elec tronically held to this power level until a higher power peak passes through the ampli fier The meter pointer will then rise to indicate the higher peak If no further power peaks are Figure 13 How to Operate the MC2KW Power Amplifier WATTS 02 20 20 200 2m mE 4K K 10 o 40 30 20 DECIBEL POWER OWTPUT Figure 14 reached the meter pointer will very slowly re turn to its rest position or lower power level The decay rate is approximately 6dB per minute Note The MC2KW OUTPUT MODULE Power Output Meter indicates the actual wattage delivered to the loudspeakers by responding to the combination of current and voltage output Input Mode Switch The Input Mode Switch which is located on the Rear Panel of the MC2KW OUT PUT MODULE allows selection of either the Balanced or Unbalanced Input Refer to figure 15 Figure 15 Pilot Light When AC Power is applied to the MC2KW the Front Panel Pilot Light will illuminate The Pilot Light is located about 1 1 2 inches 3 81cm below the Power Guard Light Refer to figure 16 Power Guard Light The Powe
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