User manual MCINTOSH MPI-4

[. . . ] With the addition of test records, the MPI 4 can show compliance and trackabilily of a phono pickup, frequency response of the preamplifier and power amplifier, audio distortion and stereo speaker balance. In the dual trace mode, the left and right stereo channels appear simultaneously and separately on the screen for direct comparison. In short, the MPI 4 is a professional measuring instrument that assures you continuously that your system is performing as expected. [. . . ] Comparison of the signals assists in comparison of recordings, the quality of stereo information in the source and much other valuable information. LEVEL The audio level of stereo signals is displayed as two vertical columns on the screen. The height of each column is determined by the power or amplitude of the input signal. Action can be stopped and held to permit close comparison between the highest levels attained by left and right channels. PHONO CARTRIDGE CALIBRATION You will protect your record investment, extend the life of your records, and reduce needle wear when the turntable is properly set up. With the aid of test recordings the MPI 4 will assist in this proper set up. The display assists in properly adjusting for proper tracking force, best tracing vs tracking force, anti-skate, proper phasing, and channel separation. FM TUNING You'll see signal strength, center channel FM tuning and a reference for multipath distortion elimination. The image is a display of the tuner IF curve. Horizontal center is the center of the detector and IF curves. Proper tuning gives minimum distortion and maximum listening pleasure on all kinds of FM broadcasts. helps you lifetime"programs flawlessly recorded · better FM reception · a measurement of the performance of the phono cartridge dge to speakers · an accurate measurement of power output PHASE Program material that is 'out of phase' sounds unnatural and thin; 'in phase' sounds alive and rich. Occasionally a program source will be 'out of phase. ' On the MPI 4 you can see the phase relationship so you can correct the condition. $599. 00 Cabinet $29. 00 BALANCE CHANNEL SEPARATION Accurate system balance assures you of full stereo pleasure, The MPI 4 gives you a visual indication of the balance of your stereo system. Through all these years Mclntosh has produced instruments that have exceptionally long life. Regardless of age, most Mclntosh instruments are still in use today. Amplifier clinics held all over North America have shown that most of the Mclntosh instruments ever manufactured are still in service today and still meet or exceed original exacting requirements for performance that were required of them when new. · Used Mclntosh instruments enjoy the highest resale value in this field. Retailers report that customers are constantly searching for used Mclntosh instruments. A Mclntosh does not remain on the "Used" display long. You'll get more when you trade-in your Mclntosh assuring you of maximum return on your investment. · Mclntosh dedication, not only to improvements, but also to fundamentals, has justified many patents on refinements as well as basic circuit structures. · The size of the Mclntosh, investment in professional testing instruments bears eloquent testimony to the commitment to acquire knowledge for the benefit of our customers. On a percentage basis Mclntosh probably invests more of its sales dollars in testing facilities than anyone else in a like business. [. . . ] As new testing instruments are produced that update the Mclntosh ability to know, Mclntosh invests in them . wave form analyzers--real time analyzers--low distortion signal generators, etc. Only through this impressive investment, through continuous testing and research, through product analysis, and endless measurement can Mclntosh promise and deliver to you reliability, long life, performance, highest value, and freedom from service. [. . . ]