McIntosh MAC 1900 Owners Manual

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Your MAC 1900 AM-FM/FM stereo receiver will give you many years of pleasant and satisfactory performance. If you have any questions concerning the operation or maintenance of this receiver please contact: CUSTOMER SERVICE McIntosh Audio Division 2 Chambers Street Binghamton, New York 13903 Our telephone number is 607-723-3512 Take Advantage of 2 years of FREE Factory Service . . . Fill in the Application NOW. CONTENTS Guarantee . . . Installation . . . How to Connect . . Tape Recorders . . . Record Players . . . Antenna , . , Maximum Performance Indicator . . . Loudspeakers . . . Mclntosh Loudspeakers . . . What the Controls Do and How to Use Them . . . Using the Tuning Dial . . . Using the Pushbuttons . . . Balancing Your Stereo . . . Listening to Your Stereo . . . Performance Limits . . . Typical Performance Charts . . . Technical Description . . . Block Diagram . . . 1 2 3 3 4, 4, 4, 6 7 8 9 9, 11 11, 12, 14, 17 21 5 5 5 10, 11 12 13 15, 16 GUARANTEE Mclntosh Laboratory Incorporated guarantees this instrument to be capable of performance as adver- tised. We also guarantee the mechanical and elec- trical workmanship and components to be free of defects for a period of 90 days from date of pur- chase. If such defects occur. Mclntosh Laboratory or one of Its authorized agencies will repair the defect at no cost to the purchaser. This guarantee does not extend to components damaged by im- proper use nor does it extend to transportation to and from the factory or service agency. TWO YEAR FACTORY SERVICE CONTRACT An application for a FREE TWO YEAR FACTORY SERVICE CONTRACT is included with this manual. The terms of the contract are: For Two Years from date of purchase - 1. Mclntosh will provide all parts, materials and labor needed to return the measured performance of the instrument to the original performance limits free of any charge. The SERVICE CON- TRACT does not cover any shipping costs to and from the authorized service agency or the factory. 2. Any Mclntosh authorized service agency will re- pair all Mclntosh instruments at normal service rates. To receive the free service under the terms of the SERVICE CONTRACT, the SERVICE CON- TRACT CERTIFICATE must accompany the instru- ment when taken to the service agency. 3. Always have service done by a Mclntosh author- ized service agency. If the instrument 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 misrepre- sentation this contract cannot be transferred to a second owner. 5. The SERVICE CONTRACT is given to purchasers who live in the 50 United States or Canada only. 6. For your protection Mclntosh selects its dealers carefully. Only one dealer in ten qualifies for a Mclntosh franchise. To receive the SERVICE CONTRACT your purchase must be made from a Mclntosh franchised dealer. 7. Your completely filled in application for a SERV- ICE CONTRACT must be postmarked within 30 days of the date of purchase of the instrument. 8. To receive the SERVICE CONTRACT all informa- tion on the application must be filled in. The SERVICE CONTRACT will be issued when the completely filled in application Is received at Mclntosh Laboratory Incorporated in Binghamton, New York. If the application is not received at Mclntosh Laboratory, only the service offered under the 90-day guarantee will apply. Copyright © 1972 By Mclntosh Laboratory Inc. 1

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justed to optimum at the factory using precision test instruments. OUT . . . MUTING disconnected. IN ... between station noise suppressed on FM. SPEAKER When the speakers have been connected to the proper push connectors on the back panel, the push- buttons turn the speakers ON or OFF. If the program is to be heard from the main speak- ers only, the REMOTE pushbuttons are pushed IN. This turns off the remote loudspeakers. if the program is to be heard from the remote speakers only the MAIN pushbutton is pushed IN. This turns off the main speakers. To hear program from both main and remote speakers, both the MAIN and REMOTE pushbuttons must be in the OUT position. MAIN PUSHBUTTON OUT ... the program mate- rial is heard from the MAIN speakers. IN ... the MAIN loudspeakers are turned OFF. REMOTE 1 or 2 PUSHBUTTON OUT ... the program mate- rial is heard from the REMOTE loudspeakers. IN ... the REMOTE loudspeakers are turned OFF. (These pushbuttons do not affect the headphone jack.) Balancing your Stereo The performance and enjoyment of a stereo sys- tem is greatly increased when the sound is properly balanced. The balance of the stereo system is af- fected by many things including room acoustics, furniture placement, room shape, small differences in loudspeakers, etc. Factors that effect proper stereo balance are correct phase for both channels and equal program loudness. TO ADJUST PHASE 1. Press the MODE pushbutton to the MONO posi- tion. 2. Turn the BALANCE control to the 12 o'clock position. 3. Stand about 10 feet in front of and midway be- tween the loudspeakers. The sound should ap- pear to come from directly in front of you. If the sound is not directly in front of you, reverse the leads on one of the loudspeakers only. When the sound comes from the midpoint between the speakers they are in PHASE. TO BALANCE LOUDNESS 1. Press the MODE pushbutton to MONO. 2. Play a familiar recording. 3. Turn the BALANCE control to the 12 o'clock position. While the program is playing, stand between the two loudspeakers. Listen for a difference in loudness between speakers. If there is then a dif- ference in loudness turn the BALANCE control toward the speaker that is not as loud. Adjust the BALANCE control until the sound is balanced be- tween both speakers. Listening to Your Stereo LISTENING TO A STEREO RECORD Turn the INPUT SELECTOR to PHONO 1 or PHONO 2, whichever is connected to the record player you wish to hear. Make certain the MODE pushbutton is in the STEREO position. Adjust the VOLUME control to desired volume. LISTENING TO A MONOPHONIC RECORD Turn the INPUT SELECTOR to PHONO 1 or PHONO 2, whichever is connected to the record player you wish to hear. Push the MODE pushbutton IN to MONO. Adjust the VOLUME control to desired volume. LISTENING TO A STEREO TAPE RECORDER Turn the INPUT SELECTOR to TAPE 1 or TAPE 2, whichever is connected to the record player you wish to hear. Set the MODE pushbutton to STEREO or MONO, depending on the program on the tape. Adjust the VOLUME control to desired volume. Two tape recorders can be used with the MAC 1900. Recording and monitoring can be done with both tape recorders. To monitor while recording your tape recorder must have separate record and playback heads and electronics for each. The TAPE MONitor pushbutton lets you monitor the quality of tape recordings made during the recording process. When the TAPE MON- itor pushbutton is in the IN position it will play the sound from the tape as it passes the playback head, a moment after it is recorded. The recording process 11