McIntosh MA 6200 Owners Manual

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VARIOUS REGULATORY AGENCIES REQUIRE THAT WE BRING THE FOLLOWING INFOR- MATION TO YOUR ATTENTION. PLEASE READ IT CAREFULLY. WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. The Mclntosh you have purchased is a Model MA 6200. It has a serial number located on the rear panel of the chassis. Record that serial number here: Serial Number The model, serial number and purchase date are important to you for any future service. Record the purchase date here: Purchase Date Upon application, Mclntosh Laboratory provides a Three-Year Service Contract. Your Mclntosh authorized Service Agency can expedite repairs when you provide the Service Contract with the in- strument for repair. To assist, record your Service Contract number here: Service Contract Number

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Your MA 6200 Integrated Amplifier will give you many years of pleasant and satisfactory performance. If you have any questions, please contact: CUSTOMER SERVICE Mclntosh Laboratory Inc. 2 Chambers Street Binghamton, New York 13903-9990 Phone: 607-723-3512 Take Advantage of 3 years of Contract Service ... Fill in the Application NOW. Contents HOW TO INSTALL... 2 HOW TO CONNECT... 4 THE FRONT PANEL CONTROLS AND HOW TO USE THEM... 8 PERFORMANCE LIMITS . . .12 PERFORMANCE CHARTS . . .13,14 TECHNICAL DESCRIPTION .. .15 BLOCK DIAGRAM...17 MclNTOSH THREE YEAR SERVICE CONTRACT An application for A THREE YEAR SERVICE CONTRACT is included with this manual. The terms of the contract are: 1. Mclntosh will provide all parts, materials and labor needed to return the measured performance of the instrument to the original performance limits. The SER- VICE CONTRACT does not cover any shipping costs to and from the authoriz- ed service agency or the factory. 2. Any Mclntosh authorized service agency will repair Mclntosh instruments at nor- mal service rates. To receive service under the terms of the SERVICE CON- TRACT, the SERVICE CONTRACT CER- TIFICATE must be presented when the instrument is taken to the service agency. 3. Always have service done by a Mclntosh authorized service agency. If the instru- ment is modified or damaged as a result of unauthorized repair, the SERVICE CONTRACT will be cancelled. Damage by improper use or mishandling is not covered by the SERVICE CONTRACT. 4. The SERVICE CONTRACT is issued to you as the original purchaser. To protect you from misrepresentation, this con- tract cannot be transferred to a second owner. 5. To receive the SERVICE CONTRACT, your purchase must be made from a Mclntosh franchised dealer. 6. Your completely filled in application for SERVICE CONTRACT must be postmark- ed within 30 days of the date of purchase of the instrument. 7. To receive the SERVICE CONTRACT, all information on the application must be filled in. The SERVICE CONTRACT will be issued when the completely filled in application is received by Mclntosh Laboratory Inc. in Binghamton, New York. Copyright 1979 © by Mclntosh Laboratory Inc. 1

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STEREO REV: Connects the left program to the right loudspeaker and the right program to the left loudspeaker. STEREO: Connects the left program to the left loudspeaker and the right program to the right loudspeaker. MONO (L + R): Adds the left and right programs together and connects to both loudspeakers. L + R to L: Connects the left plus right program to the left loudspeaker only. L + R to R: Connects the left plus right program to the right loudspeaker only. VOLUME CONTROL The VOLUME control is a precision step con- trol manufactured for Mclntosh Laboratory. It has 32 steps with a 70 dB range, plus volume off. Left and right chan- nel tracking are within 1 dB. This extreme accuracy is obtained through special electronically controlled resistance element trimming. BALANCE and LOUDness CONTROLS The BALANCE and LOUDness controls are concentric. The BAL- ANCE control [large outer knob] adjusts for equal volume of either the left or right chan- nels. The volume of the channels can be varied relative to each other. left. . . turning the control to the left accents the left channel by reducing the right channel output. right . . . turning the control to the right accents the right channel by reducing the left channel output. The LOUDness control [small center knob] in- creases both bass and treble frequencies of both channels as it is turned clockwise. Adjustment of the LOUDness control allows life-like frequency balance when playing music softly. Its frequency response contour is accurately modeled after the family of "Equal Loudness" curves identified by Fletcher and Munson. The loudness circuitry is completely independent of the volume control. Therefore, any desired amount of compensation can be introduced regardless of volume control position. Frequency response is flat and there is no loudness compensation when the knob is turned ful- ly counter-clockwise to the "flat" position. EQUALIZER FREQUENCY CONTROLS Each of five EQUALIZER FREQUENCY controls modifies upward or downward the tone balance of a band of frequencies centered on the frequency marked above the control. The flat position of the control has a detent for easy reference. Each control provides 12 dB boost or cut at the specified center frequency. Use the EQUALIZER FREQUENCY controls to modify the sound and tone balance of program material. Here are some suggestions from which to start: Problem Equalizer Correction Bass too weak Raise 30 and/or 150 Male vocalist needs reinforcing Raise 150 Female vocalist reinforcing Raise 500 Hum on program Reduce 30 Violins, trumpets dull Raise 1500 Drum "brushes" not audible Raise 10 K HEADPHONE JACKS The front panel HEADPHONE jacks have been designed to feed low impedance dynamic head- phones. Electrostatic headphones generally require higher power than dynamic headphones. They must be connected to the speaker push connectors on the rear panel. Plug headphones into either front panel HEAD- PHONE jack. Adjust the front panel VOLUME control for comfortable headphone listening. Signal to the headphone jacks is not affected by the SPEAKER switches. TAPE PUSHBUTTONS IMPORTANT: When the MA 6200 is operated with either MONITOR pushbutton at the in position, the program heard will be that from the tape recorders only. Signal from any other source will not be heard from the loudspeakers. To hear any other source, make sure the MONITOR pushbuttons are OUT. The MONITOR switches are mechanically in- terlocked to prevent simultaneous monitoring from two tape recorders. If one button is at the in posi- tion, it must be pushed again to release it to the out position before the other button can be pushed. 9