McIntosh MC205 audio amplifier
Contents
1. 12 How tO OPERA essen 13 Technical Deseription a anne 14 15 POOO eas AA AA AG 16 17 Ne PP 18 Packing Insttuelion een 19 General Information 1 For additional connection information refer to the owner s manual s for any component s connected to the MC205 Power Amplifier 2 The Main AC Power going to the MC205 and any other McIntosh Component s should not be applied until all the system components are connected together Failure to do so could result in malfunc tioning of some or all of the system s normal opera tions When the MC205 and other McIntosh Com ponents are in their Standby Power Off Mode some of the circuitry inside each component is active and communication is occurring between them In the event the MC205 overheats due to improper ventilation and or high ambient temperature the protection circuits will activate The Front Panel Power Guard LEDs will continuously indicate ON and the audio will be muted When the MC205 has returned to a safe operating temperature normal operation will resume UI 4 For the best performance and safety it is important to always match the impedance of the Loudspeaker to the Power Amplifier connections Refer to How to Connect pages 8 thru 11 Note The impedance of a Loudspeaker actually var ies as the Loudspeaker reproduces different frequencies As a result the nominal impedance rating of the Loudspeaker usually measured at a midrange freque2. 8 Connect the Loudspeaker hookup cables to the MC205 Output Terminal being careful to observe the correct polarities Insert the spade lug connec tor or prepared section of the cable end into the terminal side access hole Then tighten the termi nal cap until the cable 1s firmly clamped into the terminals so the lugs or wire cannot slip out Refer to figures 6 7 and 8 How to Connect for a Five Channel System a Figure 6 Figure 7 Figure 8 9 Place the IMPEDANCE Switch to the position 4 ohm or 8 ohm to match the impedance of the connected Loudspeakers In the event that some of the Loudspeakers in the system are differ ent impedance use the impedance of the Front Loudspeakers If the Loudspeaker s impedance is 6 ohms select the 4 ohms setting Refer to Gen eral Information Note 4 on page 3 for additional information 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 Techni cal Support 10 Connect the MC205 power cord to an active AC outlet How to Connect for a Five Channel and Zone B System or Seven Channel System Caution Do not connect the AC Power Cord to the MC205 Rear Panel until after the Loudspeaker Connections are made and the protective Termi nal Connections Cover is installed Failure to observe this could result in Electric Sho
3. Under normal operating conditions there are no differences between the shape of these waveforms If an amplifier channel 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 absolutely no audible side ef fects and the sonic purity of the music reproduction Figure 17 Without Power Guard Figure 18 With Power Guard is perfectly preserved The MC205 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 Figure 19 Power Supply Circuits To compliment the design of the MC205 there is a high current power supply for the five power ampli fier channels Refer to figure 20 The very large Power Transfomer has toroidal windings on a toroidal core and can supply over 35 amps of continuous current Refer to figure 21 golf ball 1s for size comparsion It is enclosed in the legendary McIntosh Potted Enclo sures and weighs over 12 06kg The super size main filter capacitors can store over 310 Joules of energy for the five amplifier channels neces
4. MC205 directly above a heat generating component such as a high powered amplifier If all the compo nents are installed in a single cabinet a quiet running ventilation fan can be a definite asset in maintaining all the system components at the coolest possible oper 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 bottom and 1 inch 2 54cm on each side of the Power Amplifier so that airflow is not obstructed Allow 19 1 2 inches 49 53cm depth behind the front panel Allow 7 8 inch 2 22cm in front of the mounting panel for clearance Be sure to cut out a ventilation hole in the mounting shelf accord ing to the dimensions in the drawing When the MC205 is installed together with other McIn tosh Components check clearances on all components before proceeding MC205 Front Panel Custom Cabinet Cutout MC205 Side View in Custom Cabinet MC205 Bottom View in Custom Cabinet Installation 17 1 16 43 34cm POWER GUARD POWER GUARD O POWER GUARD 20 an ie POWER QUTPUT 8 5 16 Maga 21
5. bad the rear panel to the position 4 ohm or 8 ohm that matches the imped ance of the connected Loudspeakers Figure 11 In the event that some of the Loudspeakers in the system are of different impedance IMPEDANCE use the impedance of the Left and Right Front Loudspeakers to set Ki Tl o the IMPEDANCE Switch position Figure 12 Refer to figure 12 Power Output Meters The MC205 Power Output Meters are calibrated to allow for the direct reading of either the Power Out put in Watts or Decibels for Loudspeakers connected to Channels 1 3 and 5 The meters respond to all the musical information being produced by the amplifier They indicate to an accuracy of at least 95 of the power output with only a single cycle of a 2000Hz tone burst Refer to figure 13 POWER QUTPUT Figure 13 Technical Description A continuous average power output rating of 200 watts and an output current of greater than 25 amperes per channel makes this one of the most advanced and powerful amplifiers McIntosh has ever manufactured Refer to figures 14 and 15 The distortion limits for the MC205 are no more than 0 005 at rated power output for all frequencies from 20Hz to 20 000Hz Typical performance at mid frequencies 1s less than 0 002 The true distortion readings on the MC205 are so low it takes special measuring techniques to make accurate readings The MC205 can deliver the Abi NG Se 14 best possible perform
6. strands together as tightly as possible 0 5 inches 12 7mm cm Figure 1 Figure 2 Figure 3 Notes 1 If desired the twisted ends can be tinned with solder to keep the strands together 2 The prepared bare wire cable ends may be inserted into spade lug connectors 3 Banana plugs are for use in the United States and Canada only Banana Plugs are for use in the United States and Canada only 4 Attach the previously prepared bare wire cable ends into the banana plugs and secure the connections Refer to figure 4 Figure 4 Place the IMPEDANCE Switch to 5 Referring to figure 5 connect the Loudspeaker hookup cables with banana plugs into the hole at the end of the MC205 Negative and Positive Output Termi nals I BER Figure 5 the position 4 ohm or 8 ohm to match the imped ance of the connected Loudspeakers In the event that some of the Loudspeakers in the system are different impedance use the impedance of the Front Loudspeakers If the Loudspeaker s imped ance is 6 ohms select the 4 ohms setting Refer to General Information Note 4 on page 3 for additional information 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 Techni cal Support Connect the MC205 power cord to an active AC outlet Spade Lug or Wire Connections
7. 11cm ItIntosh i Bi Prix MC205 PO WER AMP LIFIER i 6 N 15 24cm Cabinet gt poiing Front Panel o Custom Mounting Opening Pa for Ventilation Supe Opening for Ventilation Chassis Shelf 3 4 Spacers 8 57cm 12 114 31 12cm 9 Opening geml 12 38 Center the for 15 374 a 31 43cm opening horizontally Ventilation 00cm with the MC205 Chassis 1 9 7 8 oa 25 08cm 11 112 29 21cm Rear Panel Connections and Switch OUTPUT Connections for a 4 ohm or 8 ohm Loudspeaker for Channel 2 Left Surround or ZONE B Left Channel OUTPUT Connections for a 4 ohm or 8 ohm Loudspeaker for Channel 4 Right Sur round or ZONE B Right Channel Connect the MC205 power cord to a live AC outlet Refer to the rear panel to determine the correct voltage Balanced INPUT Channel 4 Right Surround or ZONE B Right Channel Main Fuse refer to the rear panel for the correct fuse size and rating Selects the impedance 4 or 8 ohms of the Loudspeakers connect OUTPUT Connections ed to the MC205 for a 4 ohm or 8 ohm Loudspeaker for Chan nel 5 Right Front OUTPUTS 4 CLASS 2 WIRING 120V N T 15AL 250V 50 60Hz 10A SLO BLO POWER CONTROL A DO NOT OPEN A AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR EZ IMPEDANCE ce Tm COCOCO OUTPUT Connections for a 4 ohm or 8 ohm Loudspeaker for Channel Left Front POWER CONTROL ZA receives
8. 205 POWER AMPLIFIER OFFIREMOTE Rear View ofthe MC205 16 13 16 42 70cm 1 LF YY 3 CTR a CLASS 2 WIRING MeIntosh mo205 POWER AMPLIFIER McINTOSH LABORATORY INC BINGHAMTON NY MADE IN USA 2 WIRIN Pr SZ 5 RF CTR 1 LF Pr Ay M N A 4 3 CTR 9 7 16 23 97cm Side View of the MC205 18 3 4 47 63cm 16 7 16 41 75cm 8 1 4 3 16 20 96cm 0 48cm 7 8 _ 1 2 2 2 22cm ag zzz n yp 30 48cm 5 08cm Me Installation The MC205 can be placed upright on a table or shelf standing on its four feet It also can be custom installed in a piece of furniture or cabinet of your choice The four feet may be removed from the bottom ofthe MC205 when it s custom installed as outlined below The four feet together with the mounting screws should be retained for possible future use if the MC205 is removed from the custom installation and used free standing The required panel cutout ventila tion cutout and unit dimensions are shown Always provide adequate ventilation for your MC205 Cool operation ensures the longest possible operating life for any electronic instrument Do not install the
9. AD FRONT AND REAR 2X SO McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 www mcintoshlabs com The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice Printed in the U S A McIntosh Part No 04130200
10. LED indicates when Amplifier Channels POWER Switch Turns AC Power 2 or 4 POWER GUARD circuit activates On or Off Remote On Off METER LIGHTS Switch selects the Standby Power On Indicator Meter Illumination On or Off 12 How to Operate How to Operate Power With the POWER Switch set to the OFF REMOTE Position the MC205 will turn On or Off when an A V Control Center turns On or Off For manual operation place the POWER Switch to the ON Position as desired Refer to figure 9 Note There must be a power control connection between the MC205 and the McIntosh A V Control Center in order for the remote power turn on to function POWER ON OFF REMOTE Figure 9 Meter Illumination Place the METER LIGHTS Switch to the ON position for Illuminated Meters or place the switch to the Off position for no Illumination When Power Control In put ZA Zone A only of the MC205 is connected to a McIntosh A V METER LIGHTS Control Center or Preamplifier with ON Remote Meter Illumination Control the Meter Illumination will automati cally be remotely controlled On Off with the METER LIGHTS Switch a to set to the ON position Refer to Figure 10 figure 10 Impedance Switch The MC205 s Dynamic Power Manager circuitry allows for the connection of either 4 ohm or 8 ohm Loudspeakers to its output terminals while at the same time delivering the same power output Refer to figure 11 Place the a IMPEDANCE Switch located on
11. McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 www mcintoshlabs com The lightning flash with arrowhead within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s en closure that may be of sufficient magnitude to constitute a risk of electric shock to persons I NTN MN BW NY na WARNING TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE 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 with the manufacturer s instruc tions Do not install near any heat sources such as radiators heat registers stoves or other appa ratus including amplifiers that produce heat Do not defeat the safety purpose of the polar ized 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 10 11 19 13 14 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ka A AV S RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL
12. alanced 2 LS and 4 RS making sure to match up channel designation Note In a Seven Channel System perform step 6 instead of step 5 7 In a Seven Channel System connect XLR cables from the Balanced Outputs SBL and SBR of an A V Control Center to the MC205 Balanced IN PUTS 5 RF and I LF making sure to match up channel designation This McIntosh MC205 Power Amplifier is designed for Loudspeakers with an impedance of 4 ohms or 8 ohms Connect a single Loudspeaker only to each Channel Output Terminals When connecting Loudspeakers to the MC205 it is very important to use cables of adequate size so there 1s little to no power loss in the cables The size is specified in Gauge Numbers or AWG American Wire Gauge The smaller the Gauge number the larger the wire size Loudspeaker Cable Distance vs Wire Gauge Guide 25 feet 50 feet 100 feet Loudspeaker Impedance 7 62 meters 15 24 meters 30 48 meters or less or less orless 12AWG 10AWG 8AWG 4Ohms 14AWG 12AWG 10AWG 8Ohms 16AWG 14AWG 12AWG 8 Prepare the Loudspeaker Hookup Cable for attach ment to the MC205 Power Amplifier Bare wire cable ends Carefully remove sufficient insulation from the cable ends refer to figures 1 2 amp 3 If the cable is stranded carefully twist the strands together as tightly as possible 0 5 inches 12 7mm zu Figure 1 Figure 2 Figure 3 Notes 1 If desired the twisted ends can be tinned with sold
13. ance from any type of high qual ity Loudspeaker System Design Philosophy The MC205 McIntosh Power Amplifier to uses the recently developed Dynamic Power Manager DPM Circuitry The MC205 can easily drive 4 ohm speak ers with their high current demand Additionally the MC205 can be used with 8 ohm speakers and deliver equal power McIntosh s new DPM design enables it to run on higher voltage rails when connected to less current hungry 8 ohm speakers and still deliver 200 watts The power penalty usually paid with 8 ohm speakers on high current amplifiers does not exist with this new design The high efficiency circuit design of the MC205 contributes to low operating temperatures More than 2100 square inches of heat sink area occupies almost half of the MC205 s chassis space and keeps the am plifier operating safely with convection cooling No fans are needed Protection Circuits The MC205 incorporates its version of the McIn tosh Sentry Monitor output transistor protection circuit There is absolutely no compromise in sonic performance with this circuit and it ensures safe operation of the amplifier under even the most extreme operating conditions Refer to figure 16 The different types of protection circuits incorporated in the Normal Operating Area Sentry Monitor Safety Area Figure 16 Output Transistor Failure MC205 insure a long and safe operating life The MC205 also includes the u
14. ck The connection instructions below together with the MC205 Connection Diagram located on the separate folded sheet Mc1B Below is an example of a typical Five Channel and Zone B System or Seven Channel System Your system may vary from this however the actual components would be connected in a simi lar manner For additional information refer to Con nector and Cable Information on page 4 1 For Remote Power Control connect a power control cable from the A V Control Center Power Control Trigger Output 1 to Power Amplifier Two Power Control In 2 Connect a power control cable from Power Amplifi er Two Power Control Out to the MC205 POWER CONTROL ZA Input 3 Connect a power control cable from the A V Con trol Center Power Control Trigger Output 2 to the MC205 Power Amplifier ZB Input Note Do not perform this step in a Seven Channel System 4 Connect XLR cables from the Balanced Outputs FL and FR of an A V Control Center to Power Amplifier Balanced Left and Right Inputs making sure to match up channel designation Note Unbalanced cables and connections may be used instead of Balanced connections 5 Connect XLR cables from the Balanced Outputs C SR and SL of an A V Control Center to the 10 MC205 Balanced INPUTS 3 CTR 4 RS and 2 LS making sure to match up channel designa tion 6 Connect audio cables from the A V Control Cen ter Zone B Left and Right Channel Outputs to the MC205 Unb
15. er to keep the strands together 2 The prepared bare wire cable ends may be inserted into spade lug connectors 3 Banana plugs are for use in the United States and Canada only Banana Plugs are for use in the United States and Canada only 9 Attach the previously prepared bare wire cable ends into the banana plugs and se cure the connections Refer to figure 4 10 Referring to figure 5 connect the Loudspeaker hookup cables with banana plugs into the hole at the end of the MC205 Negative and Positive Output Terminals 11 Place the IMPEDANCE Switch to the position 4 ohm or 8 ohm to match the impedance of the connected Loudspeakers In the event that some of the Loudspeakers in the system are different impedance use the imped Figure 4 Figure 5 How to Connect for a Five Channel and Zone B System or Seven Channel System ance of the Front Loudspeakers If the Loud eral Information Note 4 on page 3 for additional speaker s impedance is 6 ohms select the 4 ohms information setting Refer to General Information Note 4 on page 3 for additional information WARNING Loudspeaker terminals are hazardous live WARNING Loudspeaker terminals are hazardous live and present a risk of electric shock For additional and present a risk of electric shock For additional instruction on making Loudspeaker Connections instruction on making Loudspeaker Connections contact your McIntosh Dealer or McIntosh Technical contac
16. formation Introduction and Performance Features e Sentry Monitor and Thermal Protection McIntosh Sentry Monitor power output stage protec tion circuits ensure the MC205 will have a long and trouble free operating life Built in thermal protection circuits guard against overheating e Illuminated Power Meters The Illuminated Power Output Watt Meters on the MC205 are peak responding and indicate the power output of the amplifier e Power Control The McIntosh Power Control Circuit allows for remote turn on of the MC205 Power Amplifier from a McIn tosh A V Control Center or Preamplifier for a single or dual Zone System e Special Power Supply A regulated Power Supply and a very large Toroidal Wound Power Transformer ensures stable noise free operation even though the power line varies e Fiber Optic Solid State Front Panel Illumination The even Illumination of the Front Panel is accom plished by the combination of custom designed Fiber Optic Light Diffusers and extra long life Light Emit ting Diodes LEDs The glass Front Panel ensures the pristine beauty of the MC205 will be retained for many years Dimensions Dimensions The following dimensions can assist in determining the best location for your MC205 Front View of the MC205 17 1 2 44 45cm POWER GUARD POWER GUARD 8 7 8 5 mA m Le bil 2c 5 5 pex 22 54cm POWER GUARD POWER McIntosh MC
17. n each end Introduction aa e Q rr 8 a a aa aa a a 88 z Now you can take advantage of traditional McIntosh standards of excellence in the MC205 Power Ampli fier The five channel Power Amplifier produces a power output of 200 watts per channel and will drive quality Loudspeakers to a high level of performance The MC205 reproduction is sonically transparent and absolutely accurate The McIntosh Sound is The Sound of the Music Itself Performance Features e Power Output The MC205 consists of five Power Amplifier Chan nels each capable of 200 watts into 4 ohm or 8 ohm Loudspeakers with less than 0 005 distortion e Power Guard The patented McIntosh Power Guard Circuit prevents the amplifier from being over driven into clipping with its harsh distorted sound that can damage your valuable Loudspeakers e Dynamic Power Manager The MC205 s Dynamic Power Manager DPM cir cuitry allows for the connection of either 4 ohm or 8 ohm Loudspeakers while at the same time delivering identical power output A peak output current of 25 amperes per channel ensures that it will successfully drive high quality Loudspeakers such as McIntosh for a truly exciting sound experience e Balanced and Unbalanced Inputs Balanced connections guard against induced noise and allow long cable runs without compromising sound quality General Information con t and Cable In
18. ncy might not always agree with the impedance of the Loudspeaker at low frequencies where the greatest amount of power is required Contact the Loudspeaker Manufac turer for additional information about the actual impedance of the Loudspeaker before connecting it to the McIntosh MC205 General Information con t 5 When discarding the unit comply with local rules or regulations Batteries should never be thrown away or incinerated but disposed of in accordance with the local regulations concerning battery disposal 6 For additional information on the MC205 and other McIntosh Products please visit Dad the McIntosh Web Site at www mcintosh labs com Connector and Cable Information XLR Connectors Below is the Pin configuration for the XLR Balanced Input Connectors on the MC205 Refer to the diagram for connection PIN 1 Shield Ground PIN 2 Output PIN 3 Output PIN 3 Power Control Connector The MC205 s Power Control Inputs receive On Off signals of 5 volts An additional connection is for controlling the illumination of the MC205 Power Out put Meters The 1 8 inch stereo mini phone plug connects to a Power McIntosh A V Control Center paaa Power Control Output Illumination Note The Power Control Connect Control Ground ing Cable is available from the McIntosh Parts Department Data and Power Control Cable Part No 170 202 Six foot shielded 2 conductor with 1 8 inch stereo mini phone plugs o
19. nformation refer to Connector and Cable Information on page 4 1 For Remote Power Control connect a power control cable from the A V Control Center Power Control Trigger Output 1 to the Amplifier POWER CON TROL ZA input 2 Connect XLR cables from the Balanced Outputs FL C FR SR and SL of an A V Control Center to the MC205 Balanced INPUTS 1 LF 3 CTR 5 RF 4 RS and 2 LS making sure to match up channel designation Note Unbalanced cables and connections may be used instead of Balanced connections This McIntosh MC205 Power Amplifier is designed for Loudspeakers with an impedance of 4 ohms or 8 ohms Connect a single Loudspeaker only to each Channel Output Terminals When connecting Loudspeakers to the MC205 it is very important to use cables of adequate size so there 1s little to no power loss in the cables The size is specified in Gauge Numbers or AWG American Wire Gauge The smaller the Gauge number the larger the wire Size Loudspeaker Cable Distance vs Wire Gauge Guide as kar 25 feet 50 feet 100 feet p 7 62 meters 15 24 meters 30 48 meters Impedance or less or less or less 12AWG 10AWG 8AWG 4Ohms 14AWG 12AWG 10AWG 8O0hms 16AWG 14AWG 12AWG 3 Prepare the Loudspeaker Hookup Cable for attach ment to the MC205 Power Amplifier Bare wire cable ends Carefully remove sufficient insulation from the cable ends refer to figures 1 2 amp 3 If the cable is stranded carefully twist the
20. nique patented McIntosh Power Guard circuit Power Guard elimi nates the possibility of ever overdriving the ampli fier into clipping Refer to figures 17 18 and 19 An NEGATIVE BALANCED gt BALANCED TO ELECTRON UNBALANCED gt Ic CONN ATTENUATOR gt INPUT UNBALANCED VOLTAGE AMP POWER DIFF GUARD AMP e DC CURRENT BIAS SOURCE Ka Pil PG INDICATOR INDIEATOR Block Diagram of the Power Amplifier VOLTAGE AMP CURRENT 4t LIMITER PREDRIVER PREDRIVER POSITIVE one channel shown THERMAL SENSE DC SENSING gt RELAY gt OUTPUT DRIVE RELAY TURN ON DELAY CURRENT LIMITER NEGATIVE le FEEDBACK Figure 15 e o OUTPUT OUTPUT METER x 42 82 MODE CONTROL Technical Description Input Test Signal overdriven amplifier can produce both audible and inaudible distortion levels exceeding 40 The audible distor tion is unpleasant to hear but the inaudible ultrasonic distortion 1s also undesirable since it can damage valuable Loudspeaker System tweeters You will never experience the harsh and damaging distortion due to clipping The Power Guard circuit is a waveform compara tor monitoring both the input and output wave forms
21. r system If you or your Dealer wish additional help concerning a suspected problem you can receive technical assistance for all McIntosh products at McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 Phone 607 723 1545 Fax 607 724 0549 Copyright 2006 2011 by McIntosh Laboratory Inc 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 assistance 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 Table of Contents Safety Li 0c ee ee 2 Thank You and Please Take a Moment 3 Technical Assistance and Customer Service 3 Taole ol Contents een 3 General NONONG AA nA 3 4 Connector and Cable Information 00000008 4 PEO CC TONS nee PN 4 Periormane SF CAE CS een 4 B ien TNS On AA E a 5 Install al om OEE E E AE A E E 6 Connections Rear Panel Connections ee 7 How to Connect for a Five Channel System 8 9 Connection Diagram Separate Sheet Mc1A How to Connect for a Five Channel and Zone B Sys tem or Seven Channel System 10 11 Connection Diagram Separate Sheet Mc1B Front Panel Displays and Controls
22. rom 20Hz to 20 000Hz 0 3dB from 10Hz to 100 000Hz Input Sensitivity for rated output 2 0 Volt Balanced with a 4 ohm Loudspeaker 1 0 Volt Unbalanced with a 4 ohm Loudspeaker 2 8 Volt Balanced with a 8 ohm Loudspeaker 1 4 Volt Unbalanced with a 8 ohm Loudspeaker Signal To Noise Ratio A Weighted 112dB below rated output 18 Specifications Intermodulation Distortion Overall Dimensions 0 005 maximum if the instantaneous peak power Width is 17 1 2 inches 44 45cm output is rated power or less per channel with all chan Height is 9 7 16 inches 23 97cm including feet nels operating for any combination of frequencies Depth is 21 inches 53 3cm including the Front Panel from 20Hz to 20 000H7 and Cables Wide Band Damping Factor Weight Greater than 70 at 4 ohms 81 pounds 44 2 kg net 114 pounds 51 8 kg in ship Greater than 140 at 8 ohms ping carton Input Impedance Shipping Carton Dimensions 20 000 ohms Balanced Width is 29 1 2 inches 74 93cm 10 000 ohms Unbalanced Depth is 30 1 2 inches 77 47cm Height is 17 1 2 inches 44 45cm Power Guard Less than 2 THD with up to 14dB overdrive at 1 000Hz Power Requirements 100 Volts 50 60Hz at 12 Amps 110 Volts 50 60Hz at 11 Amps 120 Volts 50 60Hz at 10 Amps 220 Volts 50 60Hz at 6 Amps 230 Volts 50 60Hz at 6 Amps 240 Volts 50 60Hz at 6 Amps Note Refer to the rear panel of the MC205 for the cor rect voltage Packing Instructions Packing Instruction
23. s M In the event it is necessary to repack the equipment for shipment the equipment must be packed exactly as shown below It is very important that the four plastic feet are attached to the bottom of the equipment Four 1 4 20 x 2 1 2 inch screws and washers must be used to fasten the unit securely to the bottom pad and ship ping skid This will ensure the proper equipment loca tion on the bottom pad Failure to do this will result in 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 write Customer Service Depart ment of McIntosh Laboratory Please see the Part List for the correct part numbers Quantity Part Number Description 1 034052 Shipping carton top 1 034051 Shipping carton bottom 2 034054 Foam Pad top and bottom 2 034186 Foam Pad front and rear 2 034187 Foam Pad sides 1 034136 Inner carton top 1 034137 Inner carton bottom 1 034188 Foam Pad inner carton 034264 Shipping skid 4 101212 1 4 20x2 1 4 cap screw 4 104058 Flat washer INNER ee CARTON TOP CANG ig INNER CARTON SHIPPING SKID INNER CARTON BOTTOM bo sgad Flat WASHER 4x 1 4 20 X 2 1 4 CAP SCREW 4x SHIPPING CARTON BOTTOM SHIPPING CARTON TOP FOAM PAD TOP AND BOTTOM 2X 1g KO INSIDE BOX a y FOAM PAD SIDE 2X MW FOAM P
24. s equipment to dripping or splashing and ensure that no objects filled with liquids such as vases are placed on the equipment To completely disconnect this equipment from the a c mains disconnect the power supply cord plug from the a c receptacle The mains plug of the power supply cord shall remain readily operable Do not expose batteries to excessive heat such as sunshine fire or the like Connect mains power supply cord only to a mains socket outlet with a protective earthing connection Thank You Your decision to own this McIntosh MC205 Power Amplifier ranks you at the very top among discrimi nating music listeners You now have The Best The McIntosh dedication 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 pos sible with all the features and functions of your new McIntosh Please Take A Moment Er ee The serial number purchase date and McIntosh Dealer name are important to you for possible insurance claim or future service The spaces below have been provided for you to record that information Serial Number Purchase Date Dealer Name Technical Assistance SSS at 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 you
25. sary for the wide dy namic range that Digital Audio demands The power amplifier draws high current from the AC power line POWER SWITCH Figure 21 Therefore it is important that they plug directly into the wall outlet Also most owners desire one power switch for the whole audio system The MC205 is equipped with a circuit that provides remote Power Control from a McIntosh A V Control Center When the A V Con trol Center is switched On a 5V signal operates the power relay in the MC205 The MC205 also has a remote Power Control input for Zone B operation two of the five channels LOW VOLTAGE SUPPLY INRUSH CURRENT LIMITER TOROID 40 8Q MODE POWER TRANSFORMER CONTROL 120VAC 50 60Hz 80 MAIN SUPPLY 4Q MAIN SUPPLY Block Diagram of the Power Supply THERMAL SENSE Figure 20 16 POWER GUARD POWER GUARD POWER GUARD POWER GUARD Photos 17 Specifications Power Output Minimum sine wave continuous average power output per channel all channels operating 1s 200 watts into a 4 ohm or 8 ohm load Output Load Impedance 8 and 4 ohms Rated Power Band 20Hz to 20 000Hz Total Harmonic Distortion 0 005 maximum harmonic distortion at any power level from 250 milliwatts to rated power 20Hz to 20 000Hz Dynamic Headroom 1 7dB Frequency Response 0 0 25dB f
26. t your McIntosh Dealer or McIntosh Technical Support Support 15 Connect the MC205 power cord to an active AC 12 Connect the MC205 power cord to an active AC outlet outlet Spade Lug or Wire Connections 13 Connect the Loudspeaker hookup cables to the MC205 Output Terminal being careful to observe the correct polarities Insert the spade lug connec tor or prepared section of the cable end into the terminal side access hole Then tighten the termi nal cap until the cable 1s firmly clamped into the terminals so the lugs or wire cannot slip out Refer to figures 6 7 and 8 Figure 6 Figure 7 Figure 8 14 Place the IMPEDANCE Switch to the position 4 ohm or 8 ohm to match the impedance of the connected Loudspeakers In the event that some of the Loudspeakers in the system are differ ent impedance use the impedance of the Front Loudspeakers If the Loudspeaker s impedance is 6 ohms select the 4 ohms setting Refer to Gen 11 Ic Front Panel Displays and Controls LED indicates when Amplifier Channels 1 Meter indicates the Power Output of 3 or 5 POWER GUARD circuit activates the amplifier for Channels 1 3 and 5 POWER GUARD POWER GUARD POWER GUARD Co Co Co g2 20 2 0 20 200 Nga 20 u rea 40 POWER QUTPUT POWER QUTPUT POWER QUTPUT POWER GUARD 2 4 Co CI METER LIGHTS POWER Mel ntosh 2 u be a ral M MC205 POWER AMPLIFIER May W OFF OFF REMOTE
27. 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 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufacturer Use only with the cart stand tripod bracket or table specified by the manu facturer or sold with the appa ratus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service person nel Servicing is required when the apparatus has been damaged in any way such as power EN The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance 15 16 Li 18 19 To prevent the risk of electric shock do not remove cover or back No user serviceable parts inside supply cord or plug 1s damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped Do not expose thi
28. turn On Off signals from a McIntosh component for Zone A Channels 1 5 ZB receives turn On Off signals from a McIntosh component for Zone B Channels 2 and 4 OUTPUT Connections for a4 ohm or 8 ohm Loudspeaker for Chan 4 OUTPUTS 4 efo 1 LF l S efo 3 CTR eO CLASS 2 WIRING Melntosk mc2o5 POWER AMPLIFIER McINTOSH LABORATORY INC BINGHAMTON NY MADE IN USA INPUTS nel 3 Center Front CT NS Balanced INPUT Channel 1 Left Front 5 RF 3 CTR Unbalanced INPUTs Channel 2 Left Sur round and Channel 4 Right Surround or ZONE B Left and Right Channels Balanced INPUT Channel 2 Left Surround or ZONE B Left Channel Balanced INPUTS Channel 5 Right Front and Channel 3 Center Front Unbalanced INPUTs Channel 1 Left Front and Channel 3 Center Front Unbalanced INPUT Channel 5 Right Front Me How to Connect for a Five Channel System Caution Do not connect the AC Power Cord to the MC205 Rear Panel until after the Loudspeaker Connections are made and the protective Termi nal Connections Cover is installed Failure to observe this could result in Electric Shock The connection instructions below together with the MC205 Connection Diagram located on the separate folded sheet Mic1 A is an example of a typical Mul tichannel System Your system may vary from this however the actual components would be connected in a similar manner For additional i
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