McIntosh MA7000 audio amplifier
Contents
1. N Figure 11 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 12 Power Transistors used in each channel of the MA7000 Power Output Circuitry have matched uniform current 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 Thermal Trak Refer to figure 12 This allows for the instantaneous and accurate monitoring of the Power Transistor Temperature The MA7000 Power Output Circuitry has a specially de signed bias circuit to take full advantage of the ThermalTrak Power Transistors 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 The output signal of the circuit is coupled together in the unique McIntosh MA7000 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 unequaled expertise of McIntosh in2. Integrated Amplifier 25 25 25 65 25 250 25 25 25 25 25 p59 a 30 20 40 40 30 20 4G SF 50 o MA7000 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 intended to alert the user to the presence of uninsulated danger ous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of A electric shock to persons NYO MN B WN 10 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 instructions Do not install near any heat sources such as radia tors heat registers stoves or other apparatus including amplifiers that produce heat 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 ground ing type plug has two blades and a third ground ing prong The wide blade or the third prong are provided for
3. The Power Control Output connection provides convenient Turn On Off of McIntosh Source Components The Data Ports together with the supplied Remote Control provides control of McIntosh Source Components connected to the MA7000 e Special Power Supply The large Power Transformer multiple filter capacitors and regulated Power Supply 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 accomplished by the combination of custom designed Fiber Optic Light Diffusers and extra long life Light Emitting Diodes LEDs The glass Front Panel ensures the pristine beauty of the MA7000 will be retained for many years Dimensions Dimensions The following dimensions can assist in determining the best location for your MA7000 There is additional in formation on the next page pertaining to installing the MA7000 into cabinets 17 1 2 44 45cm Mentos 25 25 25 95 95 250 Front View of the MA7000 Vents A a pra ewe ee Ce A 9 7 16 23 9
4. performance at mid frequencies is less than 0 002 The true distortion readings on the MA7000 are so low it takes special measuring techniques to make accurate readings an oe ee M McIntosh AUDIO AUTOFORMER 750693 ORN w 83 Frequency Range F 15Hz to 100kHz vio Power Level Bw 250 Watts POWER OUTPUT 250 watts minim FREQUENCY RESPONSE 0 0 5dB from 20Hz to 20kHz INPUT SENSITIVITY Phono 1 2mV for2 5 High Level 250mV for 2 5V output Power Amplifier 2 5V for rated output Melntosh POWER TRANSFORMER 750694 Precision Performance By McIntosh Mcintosh Laboratory Inc Binghamton New York EQUALIZER Made in U S A Vi The MA7000 can deliver the best possible performance from any type of high quality loudspeaker system 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 Preamplifier Design Philosophy All Audio Signal Switching in the MA7000 is done by 25 Electro Magnetic devices Electro Magnetic Switching is a proven technology that uses the latest in materials and manufacturing methods Each switch consists of a glass tube that is filled with an inert oxygen free atmosphere and ern TER ET AN Ss ee oe ae ae Oe el H IMM MH _ i MeIntosh AUDIO AUTOFORMER 750693 ORN
5. Balanced Cables from the MA7000 CD INPUT Jacks to the McIntosh SACD CD Player Fixed Balanced Output Jacks Note Unbalanced Audio Cables may be used instead of the Balanced Cables but not both 15 Connect an Audio Cable from the MA7000 SERVER INPUT Jacks to the McIntosh Music Server Output Jacks 16 Connect an Audio Cable from the MA7000 REC OUT PUT Jacks to the McIntosh Music Server Input 1 Jacks 17 Connect Balanced Cables from the MA7000 DVD INPUT Jacks to the McIntosh Audio Video Player Bal anced Output Jacks Note Unbalanced Audio Cables may be used instead of the Balanced Cables but not both 18 Connect the Audio Cables coming from the Turntable to the MA7000 PHONO INPUT Jacks 19 Optionally connect Balanced Cables from the MA7000 OUTPUT 2 Jacks to the McIntosh Power Amplifier Secondary Input Jacks 20 Connect any additional McIntosh Components in a similar manner as outlined in steps 14 thru 18 Ground Connections 21 Connect the Ground Cable coming from the Turntable to the MA7000 GND Binding Post AC Power Cords Connections 22 Connect the MA7000 and any remaining components AC Power Cords to a live AC outlet as illustrated How to Connect Connecting Loudspeakers Caution The supplied AC Power Cord should not be connected to the Rear Panel of the MA7000 Amplifier until after the Loudspeaker Connec tions have been made Failure to observe this could result in Electric Shock For additional i
6. Cabinet Cutout MA7000 Side View in Custom Cabinet MA7000 Bottom View in Custom Cabinet Note Center the cutout Horizontally on the unit 5 For purposes of clarity the above illustration is not drawn to scale the drawing Installation 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 Integrated Amplifier so that airflow is not ob structed Allow 20 inches 50 8cm depth behind the front panel Allow 2 1 4 inch 5 72cm in front of the mounting panel for handle clearance Be sure to cut out a ventilation hole in the mounting shelf according to the dimensions in 17 1 16 i 43 34cm MeIntosh WA O Bp 25 25 9225 250 S INTEGRATED AMPLIFIER Nena 40 30 po 1g DECIBELS POWER OUTPUT CO POWER GUARD CJ BALANCE VOLUME 8 5 16 21 11cm 6 Cabinet a ue atk on Custom Mounting Panel et Opening ps for Ventilation Cutout Opening for Ventilation 4 5 8 11 75cm 9 1 2 24 13cm 16 40 64cm Cutout Opening for Ventilation 10 D 25 4cm a Chassis Spacers 11 12 29 21cm Rear Panel Connections Connect the MA7000 EXT SENSOR con GND JUMPER PLUGS power cord to a live nector
7. except the REC OUTPUT The MUTE LED above the push button will flash on and off to indicate that Mute is active To un mute the audio press the MUTE Push but ton again Mono Press the MONO Push button to switch from Stereo to Mono for Monophonic listening Disc Server and Tape Functions Use these push buttons to operate a DVD Player CD Player CD Changer Music Server or Tape Recorder Numbered Push buttons Press Push buttons 0 through 9 to access tuner station pre sets tracks on discs or selections on a Music Server Disc and Track Use the DISC and TRACK Push buttons when a Disc Player or Music Server is being used Tuner Push buttons Press the AM or FM Push button to select the desired broadcast band Press and release the Channel UpA or Down Push button to move from station to station Press and hold a Channel UpA or Down Push button to move continuously from station to station Press 10 Push button to start the automatic brief audition of each of the pre sets stored in the tuner memory Press 10 Push button a second time to stop on a station preset and exit the review process Volume Press the UpA or Down VOLUME Push button to raise or lower the listening volume level Note The Record Signals present at REC OUTPUTS are not affected by volume changes How to use the Remote Control Pause Press the Pausell Pushbutton to perform various functions on a variety of McIntosh Components It will also pause the
8. playing of a disc or tape player The Pause Push but ton will also allow for quick exiting from the active menu when in the setup mode The Pause Push button is also used as an Enter Push button with some McIntosh compo nents Acc On Off Press ACC ON to turn the power ON or ACC OFF switch es AC Power ON or OFF to certain McIntosh Components when connected via the Data Port and any McIntosh Com ponents connected to the ACC Power Control Jack Front Panel Displays Controls Push buttons and Jack vite Meter indicates the LED indicates when the LED indicates when the VOLUME Control allows Left Channel Out Left Channel Amplifier Right Channel Amplifier adjustment of the listening put of the amplifier POWER GUARD circuit POWER GUARD circuit level for both channels activates activates BALANCE Control The LEDs above Equalizer Controls Meter indicates the Standby Power the push buttons On Indicator indicate the current source selected allows adjustment of the relative volume balance between channels provide 12dB of boost or cut at the center frequencies indicated above each control OO Nyo A ede Ay S y eT S amp Right Channel Out put of the amplifier Mcintosh MA7000 25 25 259 9925 250 INTEGRATED AMPLIFIER o a amwe m Ta POWER OUTPUT POWER OUTPUT CI POWER IGUARD CJ VOLUME QO MUTE 1500 HEADPHONES SERVER TUNER PHONO MONO 1 OUTPUTS 2 STANDRY ON oe ele o0 OO
9. the McIntosh Autoformer provides absolute protection from possible damage to your valuable loudspeakers Figure 13 Protection Circuits The MA7000 incorporates its version of the McIntosh Sentry Monitor output transis tor protection circuit Refer to figure 14 There is absolutely no compromise in sonic per formance with this circuit and it ensures safe operation of the ee Output amplifier under even the most ee rate extreme operating conditions The different types of protec tion circuits incorporated in the MA7000 insure a long and safe operating life The MA7000 also includes the unique patented McIn tosh Power Guard circuit Power Guard eliminates the pos sibility of ever overdriving the ampli fier into clipping Refer to figures 15 16 and 17 An overdriven amplifier can produce both audible and inaudi ble distortion levels exceeding 40 The audible distortion is unpleasant to hear but the inaudible ultrasonic distortion is also undesirable since Norm Qosreiiine Ar Figure 14 Figure 15 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 comparator monitoring both the input and output wave forms Under normal operating con ditions there are no differences be tween the shape of these waveforms If an amplifier channel is overdriven there will be a difference between the two s
10. the OUTPUT 2 Push button to switch On or Off the external Power Amplifier Jumpers OUTPUTS INPUTS CD2 SERVER TUNER PWRAMP REC How to Operate the MA7000 con t Reset of Microprocessors In the unlikely event the controls of the MA7000 stop functioning the microprocessors can be reset by perform ing the following 1 Press and hold in the STANDBY ON Push button for approximately five seconds 2 When the MA7000 cycles On then Off release the STANDBY ON Push button 3 When the STANDBY ON LED 1s illuminated press the STANDBY ON Push button the MA7000 will resume normal operation Note This can be performed with the MA7000 On or in the Standby Mode 2555820 OOOOG O Figure 8 OUTPUTS INPUTS CD2 SERVER TUNER PWRAMP 1 Figure 9 14 R 2 L Technical Description Technical Description McIntosh Laboratory the company who introduced the world s first amplifier that could be called High Fidel ity has done it again The McIntosh engineering staff has created a power amplifier without compromise using the most advanced McIntosh circuit design concepts A continuous average power output rating of 250 watts and with an output current of greater than 50 amperes per channel making this the most advanced Integrated Ampli fier McIntosh has ever manufactured The distortion limits for the MA7000 are no more than 0 005 at rated power output for all frequencies from 20Hz to 20 000Hz Typical
11. 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 re ceptacles and the point where they exit from the apparatus CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN 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 AVI S RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL To prevent the risk of electric shock do not remove cover or l1 12 13 14 ks 16 17 18 back No user serviceable parts inside Only use attachments accessories specified by the manufacturer 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 mov ing 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 supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus t
12. 7cm oa a a me Do m e ae ee o O O OOQ 16 13 16 42 70cm nos ane Pi PEE teow We Rear View of the MA7000 19 3 4 50 17cm a nid 16 7 16 Z 41 75cm me Side View of the MA7000 8 4 4 sigg 20 96cm G 0 48cm E 7 8 1 2 3 4 1 1 4 2 22CM 32 39cm 3 18cm vite Installation The MA7000 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 of the MA7000 when it is custom installed as outlined below The four feet togeth er with the mounting screws should be retained for pos sible future use if the MA7000 is removed from the custom installation and used free standing The required panel cutout ventila tion cutout and unit dimensions are shown Always pro vide adequate ventilation for your MA7000 Cool opera tion ensures the longest possible operating life for any electronic instrument Do not install the MA7000 directly above a heat generating com ponent such as a high powered amplifier If all the components are installed in a single cabinet a quiet run ning ventilation fan can be a definite asset in maintaining all the system components at the coolest pos sible operating temperature A custom cabi net installation should provide the following minimum spac ing dimensions for cool opera tion MA7000 Front Panel Custom
13. 8a E 4 vio 20 BLU COM O NOISE RATIO MA7000 INTEGRATED AMPLIFIER DISTORTION any power level from 250mW er channel from 20Hz to 20kHz Variable to 12dB boost or cut Frequencies 30 150 500 1500 and 10kHz MA7000 Top View 15 vite sealed with tiny leads protruding from either end Refer to figure 10 These leads extend into the tube and overlap one another with a separation of a few thou sandths of an inch The leads are made from a ferrous material that is influenced by a magnetic field They are first plated with gold as a base material then with rhodium and finally ruthenium Ruthenium is the best contact material known The glass assembly is then placed in the center of a multilayer coil of copper wire The entire assembly is molded together in a tough shock absorbing material The switch and coil connectors extend from the bottom in the form of printed circuit board terminals When a DC volt age is applied to the coil current flows and creates a mag netic field The force of the field causes the leads to bend and contact one another inside the sealed glass tube The inert gas eliminates corrosion of the contacts and insures a low resistance distortion free switch All inputs outputs and data ports are controlled by logic circuits in the MA7000 The logic is changed by front panel push buttons or by a microprocessor IR de coder This microprocessor IR decoder is programmed with exclusive McIn
14. Q REC Source Push buttons Connection for low OUTPUTS 1 and 2 STANDBY ON select audio signals from impedance dynamic Push buttons with Push button switch seven inputs for listening headphones for private indicators turn the es the MA7000 ON IR Sensor receives commands from a Remote Control listening Loudspeakers and Preamplifier Output 2 On or Off or OFF Standby and resets the micro processors MONO Push button with indicator combines the Left and Right Channel signals for Monophonic Sound MUTE Push button with indicator mutes the audio from the Loudspeakers and Headphones How to Operate the MA7000 How to Operate the MA7000 Power On The Red LED above the STANDBY ON Push button lights to indicate the MA7000 is in Standby mode To Switch ON the MA7000 press the STANDBY ON Push button on the Front Panel or the Power Push button on the Remote Control The MUTE LED will light for approximately two seconds after turn on Refer to page 12 and figure 7 Note For an explanation of the Remote Control Push but ton functions refer to pages 10 and 11 Source Selection Select the desired source with the appropriate push button switch on the Front Panel or Remote Control Volume Control Rotate the Front Panel VOLUME Control or use the VOLUME UpA or Down Push buttons on the Remote Control for the desired listening level Balance Control Rotate the Front Panel BALANCE Control as needed to ac
15. TS are not affected by the VOLUME or BALANCE controls 13 How to Operate the MA7000 con t Using a Separate Power Amplifier There are two different ways to use a separate power am plifier with a MA7000 The first way is to use the separate amplifier instead of the MA7000 built in Power Amplifier Connect the Loudspeakers to the separate power amplifier and remove the McIntosh Jumpers that are located between the OUTPUTS 1 Jacks and the POWER AMP INput Jacks Refer to figure 8 Note The McIntosh Jumpers must be connected between the above mentioned jacks when the MA7000 Internal Power Amplifier is to be used The second way is to use both a separate power amplifier and the MA7000 built in Power Amplifier Connect one pair of Loudspeakers to the separate power amplifier and the second pair to the MA7000 Refer to the MA7000 Out put Connection Diagrams located on the separate folded sheet Mc1B and figure 8 below Note The MA7000 VOLUME Control will affect the sound level of all the Loudspeakers Using Output 2 The MA7000 has provisions for connecting an external Power Amplifier to drive Loudspeakers in another room and an external sensor for remote operation of the MA7000 from that room With an external Power Amplifier con nected as illustrated on the McIntosh Connection Diagram separate sheet Mc1B press the Front Panel OUTPUT 2 Push button or press on the Remote Control the 2nd Push button followed by pressing
16. e MA7000 System Use to select tuner presets disc tracks or any numbered operation Selects AM Tuner Operating Func tions and Disc Selection on certain McIntosh Disc Players Mutes the audio Selects a Disc Player Music Server or Tape Recorder Function and also performs various functions on a variety of McIntosh Components Selects one of the seven available Audio Sources Melntosh Remote Control Push Buttons Press MODE to switch between Stereo and Mono Modes Press to Power ON the MA7000 Press to Power OFF the MA7000 Selects FM Tuner Operating Func tions and Track Selection on certain McIntosh CD Players Press to review Tuner Station Pre sets and select certain functions on a variety of McIntosh Components Adjusts the volume level up or down Selects On Screen Functions on a variety of McIntosh Components Selects the FF Fast Forward or REWind Mode on a Disc Player Music Server or Tape Recorder tunes Up or Down the AM FM Dial Note Push buttons whose function is not identified above are for use with other McIntosh Products How to use the Remote Control E The supplied Remote Control is capable of directly con trolling the functions of contemporary McIntosh Source Components connected to the MA7000 via the Data Ports Input Source Selection Press the appropriate Source Push button to select the desired program source Mute Press the MUTE Push button to mute the audio in all outputs
17. emands Specifications Power Output 250 watts is the minimum sine wave continuous average power output per channel both channels operating Output Load Impedance 2 4 or 8 ohms Rated Power Band 20Hz to 20 000Hz Total Harmonic Distortion 0 005 maximum with both channels operating from 250 milliwatts to rated power 20Hz to 20 000Hz Dynamic Headroom 2 0dB Frequency Response 0 0 5dB from 20Hz to 20 000Hz 0 3dB from 10Hz to 100 000Hz Preamplifier Main Output for rated input 2 5V unbalanced 8V Maximun 5 0V balanced 16V Maximun Sensitivity for rated output High Level 250mV unbalanced 500mV balanced Phono 1 2 mV Power Amp In 2 5V Signal To Noise Ratio A Weighted High Level 100dB below rated output Phono 84dB below 5mV input Power Amplifier 115 below rated output Intermodulation Distortion 0 005 maximum if the instantaneous peak power is 500 watts or less per channel with both channels operating for any combination of frequencies from 20Hz to 20 000Hz Wide Band Damping Factor Greater than 40 Input Impedance High Level 20K ohms Phono 47K ohms 65pF Power Amp In 10K ohms 18 Specifications Maximum Input Signal High Level 8V unbalanced 16V balanced Phono 45mV Power Amplifier In 16V Main Output Impedance 50 ohms Power Guard Less than 2 THD with up to 16dB overdrive at 1 000Hz Voltage Gain High Level to Rec Output 0dB High Level to Main Output 20dB Phono t
18. he appara tus has been exposed to rain or moisture does not operate normally or has been dropped Do not expose this equipment to dripping or splashing and ensure that no objects filled with liq uids 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 Thank You Your decision to own this McIntosh MA7000 Integrated Amplifier ranks you at the very top among discriminating 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 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 below 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
19. hieve approximately equal listening volume levels in each Loudspeaker Rotate the BALANCE counterclock wise to emphasize the Left Channel by reducing the level of the Right Channel Rotate the BALANCE clockwise to emphasize the Right Channel by reducing the level of the Left Channel Equalizer Controls Each of the five Equalizer Frequency Controls will raise or lower by approximately 12dB the amplitude of the band of frequencies centered at the frequency marked above the controls Both Left and Right Channels are affected At the center detent or flat position of the controls all equalizer circuit components are removed from the signal path Mono Press the Front Panel MONO Push button or the MODE Push button on the Remote Control to combine left and right stereo signals to a Monophonic signal Note The signals at the REC OUT Jacks are not affected Mute Press the MUTE Push button on the Front Panel or Remote Control to mute the audio in all outputs except the REC OUTPUT The MUTE LED above the push button flashes to indicate that Mute is active To un mute the audio press the MUTE Push button again press the Remote Control Volume Push button s or press a Source Push button Headphones Jack Connect a pair of dynamic headphones to the Headphones Jack for private listening Press the MUTE Push button to mute the Headphones press OUTPUT 1 and or 2 Push but tons to mute the Loudspeakers Note The Headphone Output is opt
20. ignal waveforms When the difference exceeds 0 3 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 effects and the sonic purity of the music reproduction is perfectly preserved The MA7000 Ampli fier with Power Guard 1s 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 16 Figure 17 Power Supply Circuits To compliment the design of the MA7000 there is a high voltage power supply for both channels The power amplifiers draw high current from the AC power line Therefore it 1s important that they plug directly into the wall outlet Turn on inrush current is cushioned by therm istors in the power transformer s primary circuit This soft start eliminates component stress during turn on The MA7000 can provide greater than 50 amperes peak output current to drive uneven speaker loads Some poor speaker designs have input impedance that dip to or 2 ohms at various frequencies and the MA7000 has the out put current reserve to drive them The MA7000 has main filter capacitors that guarantee an excellent signal to noise ratio and the energy storage necessary for a wide dynamic range that music d
21. imized for imped ances ranging from 16 to c Qn amp O N lt mn in a i m U m pej S0 90o ovtPur c 4 v C xy 7 6066066 250 ohms DISC TRACK Power Output Meters LEVEL The MA7000 Power Output Meters indicate the power delivered to the Loudspeakers The meters respond to all the musical information being pro duced by the Amplifier They indicate to an accuracy of at least 95 of the power output with only a single cycle of a 2 000Hz tone burst J 3 0 Power Guard During normal operation the Front Panel Power Guard Indicators will momentarily illuminate during peaks in the audio signals In the event the MA7000 over heats due to improper ventilation and or high ambient temperature the internal protection circuits will activate The Front Panel Power Guard Indicators will continu ously illuminate and the audio will be muted When the MA7000 has returned to a safe operating temperature normal operation will resume McIntosh Figure 7 How To Make A Tape Recording 1 Select the signal you wish to record with the appropriate Source Push button 2 Adjust the record level using the recorder volume con trol and proceed with the recording process 3 To listen to the playback of the program source just recorded press the REC Push button Note The MA7000 REC OUTPU
22. ition If a shipping carton or any of the interior part s are needed please call or write Customer Service Department of McIntosh Laboratory Refer to page 3 Please see the Part List for the correct part numbers INNER CARTON TOP FOAM PAD m INNER CARTON IMPORTANT Read Aout aN SHIPPING _ 7 SKID INNER CARTON BOTTOM eo Flat WASHER 4x e ell 1 4 20 X 2 1 4 CAP SCREW 4x Quantity l l 2 2 2 Aa h me m m m SHIPPING CARTON TOP FOAM PAD TOP AND BOTTOM 2X INSIDE BOX ae FOAM PAD SIDE 2X FOAM PAD FRONT AND REAR 2X a emt Part Number 034052 034051 034054 034186 034187 034136 034137 034188 034264 401212 104058 SHIPPING CARTON BOTTOM Description Shipping carton top Shipping carton bottom Foam Pad top and bottom Foam Pad front and rear Foam Pad sides Inner carton top Inner carton bottom Foam Pad inner carton Shipping skid 1 4 20x2 1 4 cap screw Flat washer McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 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 04105200
23. lifier The MA7000 reproduction is sonically transparent and absolutely accurate The McIntosh Sound is The Sound of the Music Itself 4 Connector Information Introduction and Performance Features Performance Features e Power Output with Patented Autoformer The MA7000 consists of a 250 watts per channel stereo Power Amplifier with less than 0 005 distortion The McIntosh designed and manufactured Autoformer allows connection of 2 4 or 8 ohm Loudspeakers e Electronic Switching and Balanced Connections The Preamplifier uses Logic Circuits controlling Electro magnetic Switches on all inputs and operating functions for reliable noiseless distortion free switching There are two Balanced Inputs for connection of source components and a Balanced Preamplifier Output for driving an external Power Amplifier e Power Guard The patented McIntosh Power Guard circuit prevents the amplifier from being overdriven into clipping with its harsh distorted sound that can also damage your valuable loudspeakers e Sentry Monitor and Thermal Protection McIntosh Sentry Monitor power output stage protection circuits ensure the MA7000 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 MA7000 are peak responding and indicate the power out put of the amplifier e Power Control and Remote Control
24. nstruction on making Loudspeaker Connec Figure 4 Figure 5 Figure 6 tions contact your McIntosh Dealer or McIn out Refer to figures 4 5 amp 6 tosh Technical Support E Banana plug connection When connecting Loudspeakers to the MA7000 it is very Insert the banana plug into the hole at the top of the important to use cables of adequate size so there is little to termi no power loss in the cables The size is specified in Gauge nal Numbers or AWG American Wire Gauge The smaller Refer the Gauge number the larger the wire size If your loudspeaker cables are 50 feet 38 1m or less tg use at least 14 Gauge If your loudspeaker cables are 100 feet 76 2m or less A and use at least 12 Gauge B Figure A Figure B 1 This McIntosh MA7000 Integrated Amplifier is de signed for the connection of a single Loudspeaker per amplifier channel with an impedance of 2 ohms 4 ohms or 8 ohms Note The remaining Loudspeaker Terminals on the Amplifier should not be connected to another Loudspeaker 2 Prepare the Loudspeaker Hookup Cables that attach to the Amplifier by choosing one of the methods below Bare wire cable ends Carefully remove sufficient insulation from the cable Note Banana Plugs are for use in the United States and Canada only When making Loudspeaker Connections to the MA7000 refer to Connection Diagram located on the separate folded sheet Mc1B This an example of a typical audio system your system may va
25. o Rec Output 46dB Phono to Main Output 66dB Power Amplifier 25dB Equalizer Controls Variable 12dB boost to 12dB cut at 30Hz 150Hz 500Hz 1500Hz and 10 000Hz Power Requirements 100 Volts 50 60Hz at 8 0 amps 110 Volts 50 60Hz at 7 2 amps 120 Volts 50 60Hz at 6 6 amps 220 Volts 50 60Hz at 3 3 amps 230 Volts 50 60Hz at 3 3 amps 240 Volts 50 60Hz at 3 3 amps Standby Less than 1 watt Note Refer to the rear panel of the MA7000 for the correct voltage Overall Dimensions Width is 17 1 2 inches 44 45cm Height is 9 7 16 inches 23 97cm including feet Depth is 22 inches 55 88cm including the Front Panel Knobs and Cables Weight 97 5 pounds 44 3 kg net 130 5 pounds 59 2 kg in ship ping carton Shipping Carton Dimensions Width is 29 1 2 inches 74 93cm Depth is 29 inches 73 66cm Height is 17 inches 43 18cm Packing Instructions Packing Instructions D 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 at tached to the bottom of the equipment Four 1 4 20x2 1 4 inch screws and washers must be used to fasten the unit securely to the bottom pad and wood skid This will ensure the proper equipment location 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 cond
26. ontrol Connector The MA7000 Power Control Output Jack sends Power On Off Signals when connected to other McIntosh Components A 1 8 inch stereo mini phone plug is used for con nection to the Power Control Output on the MA7000 Power Control N C Ground Note The Data and Power Control Connecting Cable is avail able 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 on each end Data Port Connectors The MA7000 Data Out Ports send Remote Control Signals to McIntosh Source Components A 1 8 inch stereo mini phone plug is used for Data 7 ignal connection N C Data Ground McIntosh Plug In Jumper Connector The MA7000 utilizes a phono style Plug In Jumper to con nect the OUTPUT 1 Preamplifier Output Jack to the PWR AMP Power Amplifier Input Jack for each channel Note The Jumper Connector is available from the McIntosh Parts Department McIntosh Jumper Connector Part No 117 781 Introduction E Now you can take advantage of traditional McIntosh stan dards of excellence in the MA7000 Integrated Amplifier The Power Amplifier section of the MA7000 with a power output of 250 watts per channel will drive a pair of quality Loudspeakers to a high level of performance The flex ible Preamplifier section provides connections for various input sources and may also be used to drive an external Power Amp
27. part of your 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 Customer Service SS Sl 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 Copyright 2007 by McIntosh Laboratory Inc Table of Contents salety LISP CUMS soreer riran Ei Ne 2 Thank You and Please Take a Moment cccceeec eens 3 Technical Assistance and Customer Service 088 3 Table of Contents cccccccecccceeeccceseccccssscccssccccusecceeaeesenenecs 3 General Inlormation aes sceschaccesuctosasantgeeoeteasscetenddectuedsvetaves 3 Connector and Cable Information ccc ccc cc ceeeecee eee es 4 NACE OD eects ctsstetce n aai 4 Periormance Features wivaccesiscscvescessssedeatetedaesteesseveuateceanstens 4 Dimen ON a EEE E E AAA 5 BAAS CAL oa EE E EEE 6 Connections Rear Panel Connections vcscoresecacccewseacddvncsecdsindeedosnwiediderdesees 7 Connecting C OM PONGINS ccicccsecracsassctasctedadasaxie
28. permits the terminal connect the Pream AC outlet Refer to connection of a Mc accepts plifier OUTPUT 1 information on the Intosh IR Sensor for a ground Jacks to the PWR back panel of your remote operation wire from a AMP IN Jacks MA7000 to determine turntable and are needed for the correct voltage for normal operation your unit POWER CON RIGHT OUTPUT Ci and DVD Bal TROL MAIN Out connections for a aiieediand nbalenced put sends a turn on 2 4 or 8 ohm INPUTS accept high signal to a McIn loudspeaker tosh Component when the MA7000 is turned On level program source signals McIntosh MA7OOQ INTEGRATED AMPLIFIER 4 RIGHT OUTPUTW4 McINTOSH LABORATORY INC BINGHAMTON NY MADE IN USA 4 LEFT OUTPUT 4 OUTPUT 2 sends balanced signals to a separate exter nal Power Amplifier with balanced inputs LEFT OUTPUT connections for a 2 4 or 8 ohm loudspeaker T 8AL 250V SLO BLO Main Fuse holder POWER CONTROL PHONO accepts PWR AMP refer to information 1 and 2 Output sends signals from a input accepts on the back panel a turn on signal to a Moving Magnet signals from of your MA7000 to McIntosh Component phono cartridge the internal determine the cor rect fuse size and rating when the Outputs 1 and 2 Push buttons are used Preamplifier or a separate external Pre amplifier POWER CONTROL ACC Output sends a turn On turn Off signal to a McIn tosh Component when using the MA7000 Remote Con
29. ry from this however the actual Loud speakers would be connected in a similar manner 3 Connect the Loudspeaker hookup cables from a single Loudspeaker to the output terminals that match the im pedance of the Loudspeaker being careful to observe ends refer the correct polarities Output impedance connections to figures of 2 ohms 4 ohms and 8 ohms are provided If the L2 amp 0 5 inches Loudspeaker s impedance is in between the available 3 If the aie connections use the nearest lower impedance connec cable is tion stranded Figure Figure 2 Figure 3 WARNING Loudspeaker terminals are hazardous live gas aliy and present a risk of electric shock twie he seod oeer as eya possible 4 Connect the MA7000 Power Cord to a live AC outlet Note If desired the twisted ends can be tinned with solder to keep the strands together or attach spade lug and or banana connector Spade lug or prepared wire connection Insert the spade lug connector or prepared section of the cable end into the terminal side access hole and tighten the terminal cap until the cable is firmly clamped into the terminal so the wires cannot slip vite Press to Power the LED illuminates during the time a re MA7000 ON or OFF mote command is sent to the MA7000 Turns AC Power ON or OFF to certain McIntosh Components when connected via the Data Port and any McIntosh Components connected to the ACC Power Control Jack Switches OFF the en tir
30. teerensreoues 8 Connection Diagrams Separate Sheet MclA 1B Connecting Logdsp akersS ap caraernsccensarearatacessuarnessiomequeeaied 9 Remote Control Remote Control Push buttons cccccccccaeceeccescesees 10 How to Operate by Remote Control ccccceceeee 11 Front Panel Features Front Panel Displays Controls Push buttons and Jack 12 Operation How to Operate the MA 7000 irecscesscssasetessaceatiacvensaeanes 13 14 Additional Information Technical Descriptio sessies neas 15 17 BSP CaN ONS es cata a DE E 18 Packing Instr0c HON essien 19 General Information 1 For additional connection information refer to the owner s manual s for any component s connected to the MA7000 Integrated Amplifier 2 The Main AC Power going to the MA7000 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 malfunctioning of some or all of the system s normal operations When the MA7000 and other McIntosh Components are in their Standby Power Off Mode the Microprocessor s Circuit ry inside each component is active and communication is occurring between them Connector and Cable Information XLR Connectors Below is the Pin configuration for the XLR Balanced Input and Output Connectors on the MA7000 Refer to the dia gram for connection PIN 1 Shield Ground PIN 2 Output PIN 3 Output Power C
31. the design and manufacturing of autoformers is legendary in the high fidelity industry The high efficiency circuit design of the MA7000 con tributes to low operating temperatures More than 1 000 square inches of heat sink area keep the MA7000 operating safely with convection cooling No fans are needed Figure 12 ThermalTrak is a trademark of Semiconductor Components Industries LLC SCILLC Technical Description con t Autoformers 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 output stage This increase in temperature will result in a reduced life expectancy for the amplifier The Autoformer creates an ideal match between the power amplifier output stage and the loudspeaker Refer to figure 13 There is absolutely Na nee no performance limitation with an Autoformer Its fre quency response exceeds that of the output circuit itself and extends well beyond the audible range Its distortion level is so low it 1s virtually impossible to measure In the rare event of a power ampli fier output circuit failure
32. tosh SACD CD Player Power Control Out Jack to the McIntosh Audio Video Player Power Control In Jack 3 Connect a Control Cable from the McIntosh Audio Video Player Power Control Out Jack to the McIntosh Tuner Power Control In Jack 4 Connect a Control Cable from the McIntosh Tuner Power Control Out Jack to the McIntosh Music Server Power Control In Jack 5 Optionally connect a Control Cable from the MA7000 POWER CONTROL OUTPUT 2 Jack to the McIntosh Power Amplifier Secondary Room Power Control In Jack 6 Connect any additional McIntosh Components in a similar manner as outlined in steps 1 thru 4 Data Control Connections 7 Connect a Control Cable from the MA7000 TUNER DATA PORTS Jack to the McIntosh TUNER Data In Jack 8 Connect a Control Cable from the MA7000 CD DATA PORT Jack to the McIntosh SACD CD Player Data In Jack 9 Connect a Control Cable from the MA7000 SERVER DATA PORT Jack to the McIntosh Music Server Data In Jack 10 Connect a Control Cable from the MA7000 DVD DATA PORT Jack to the McIntosh Audio Video Player Data In Jack 11 Connect any additional McIntosh Components in a similar manner as outlined in steps 7 thru 10 Sensor Connections 12 Connect a RG59U or RG6U Cable from the MA7000 EXT SENSOR F Connector to the McIntosh Sensor F Connector Audio Connections 13 Connect an Audio Cable from the MA7000 TUNER INPUT Jacks to the McIntosh TUNER 1 Fixed Output Jacks 14 Connect
33. tosh software It receives data from the front panel or external sensors and provides the command signals for input switching data switching and volume control The equalizer section uses several high technology operational amplifiers The amplifier stage has been op timized for the best transient performance and minimum distortion Five other operational amplifiers are arranged in a circuit configuration that is the equivalent of a series turned circuit A control potentiometer inserts this series tuned circuit into either the feedback or input section of the equalizer amplifier This provides a 12dB boost or cut at the frequency of the tuned circuit Refer to figure 11 The overall gain of the stage is OdB when the potentiometer is at its center detent position In this position the tone control elements are completely removed from the signal path Power Amplifier Design Philosophy The design philosophy incorporated in the MA7000 involved several different techniques all based on sound scientific logic Every stage of voltage or current ampli fication must be as linear as possible prior to the use of negative feedback McIntosh engineers know how to prop erly design negative feedback circuits so they contribute to the extremely low distortion performance expected from a McIntosh Amplifier The typical McIntosh owner would 16
34. trol ACC On Off Push buttons DATA PORTS send signals to McIntosh Source Components to allow control with the MA7000 Remote Control CD2 SERVER REC and TUNER INPUTS accept high level program source signals SERIAL NUMBER RECord OUTPUT sends signals to the input of a recording device OUTPUT 1 sends signals to the internal Power Amplifier or a separate external Power Amplifier Connecting Components SSS SSS eS ee ee eee The MA7000 has the ability to automatically switch power On Off to McIntosh Source Components via the Power Control connections The Data Port Connections allow for the remote operation of basic functions using the MA7000 Remote Control With an external sensor connected to the MA7000 remote control operation of the system is possi ble from another room and or when the MA7000 is located in a cabinet with the doors closed The connection instructions below together with the MA7000 Input and Output Connection Diagrams located on the separate folded sheet MclA 1B are an example of a typical audio system Your system may vary from this however the actual components would be connected in a similar manner For additional information refer to Con nector and Cable Information on page 4 Power Control Connections 1 Connect a Control Cable from the MA7000 POWER CONTROL MAIN Jack to the Power Control In on the McIntosh SACD CD Player 2 Connect a Control Cable from the McIn
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