User manual MCINTOSH MX112

[. . . ] There will be no drift from this accurate tuning, insuring minimum distortion and best overall FM performance. 2. ELECTRONIC FET ANALOG INPUT SWITCHING The built-in headphone amplifier is capable of driving a pair of dynamic headphones with less than 0. 02% harmonic distortion. Because of its extremely low distortion and power capability, it is also the main preamplifier output. 4. TRI-FREQUENCY PROGRAM EQUALIZER All critical input switching is done electronically using field effect transistor analog switches. [. . . ] The front panel selector simply switches small amounts of control DC voltage which turn the FET analog switches on or off. Since the FET analog switches are located near the input jacks, the length of interconnecting leads is much shorter. This design eliminates switching noise as well as frequency loss caused by the longer signal leads Three separate controls allow the balance and response of musical information to be adjusted with far more flexibility than with conventional tone controls. The center frequencies of the controls are 30 Hz, 750 Hz and 10 kHz. Plus and minus 12 dB of control is available. Use of the program equalizer controls does not affect in the slightest the low noise, low distortion performance of the tuner-preamplifier. When the equalizer controls are in their center detent or flat position, their action is neutral and response of the tuner-preamplifier is absolutely flat. 5. PRECISION TRACKING VOLUME CONTROL The MX 117 active circuit loudness control is continuously variable with constant midrange gain and operates independently of the volume control. The loudness contour is accurately modeled after the Fletcher Munson family of "Equal Loudness" curves. Noise factors are incredibly low and distortion levels are at or below the limits of the best present day test equipment. WHY YOU SHOULD OWN MclNTOSH · Mclntosh instruments have always been designed for long life with low maintenance cost and high quality performance. · Mclntosh dedication, not only to improvements but also to fundamentals, has justified many patents on refinements as well as basic circuit structures. · Mclntosh invests more on a percentage basis in research and test equipment than any of its competitors. · After thirty years of existence, amplifier clinics held all over North America have shown most Mclntosh instruments produced, regardless of age, are still in use today. · Used Mclntosh instruments enjoy the highest resale value of any products in the home music field. · Since its beginning in 1949, Mclntosh Laboratory remains under the same management. More than 58 competitors have come and gone during the same period. MX 117 PERFORMANCE LIMITS Performance limits are the maximum deviation from perfection permitted for a Mclntosh Instrument. We promise you that when you purchase a new MX 117 from a Mclntosh Franchised dealer It will be capable of performance at or exceeding these limits or you can return the unit and get your money back. Mclntosh Is the only manufacturer that makes this statement. [. . . ] We promise you that when you purchase a new MX 117 from a Mclntosh Franchised dealer It will be capable of performance at or exceeding these limits or you can return the unit and get your money back. Mclntosh Is the only manufacturer that makes this statement. PREAMP SECTION FREQUENCY RESPONSE + 0 - 0. 5 db from 20 Hz to 20 kHz RATED OUT PUT LEVELS Main Out 2. 5V Line Out 1. 25V Headphone 750mV Tape Out 250mV DISTORTION 0. 02% maximum at 2. 5V output from 20 Hz to 20 kHz INPUT SENSITIVITY AND GAIN Input to Main Out Phone 1 and 2 2. 2mV in for 2. 5V out (61. 1 dB gain at 1 kHz) AUX, Tape 1 and 2 250mV in for 2. 5V out (20 dB gain at 1 kHz) Input to Line Out Phono 1 and 2 2. 2mV in for 1. 25V out (55 dB gain at 1 kHz) AUX, Tape 1 and 2 250mV in for 1. 25V out (14 dB gain at 1 kHz) Input to Headphone Out Phono 1 and 2 2. 2mV in for 750mV out (50. 7 dB gain at 1 kHz) AUX, Tape 1 and 2 250mV in for 750mV out (9. 5 dB gain at 1 kHz) Input to Tape Out Phono 1 and 2 2. 2mV in for 250mV out (41. 1 dB gain at 1 kHz) AUX, Tape 1 and 2 25pmV in for 250mV out (0 dB gain at 1 kHz) SIGNAL TO NOISE Phono 1 and 2 -90 dB IHF A-weighted, below 10mV input -80 dB unweighted, below 10mV input AUX, Tape 1 and 2 - 100 dB IHF A-weighted, below 250mV input -90 dB unweighted, below 250mV input INPUT IMPEDANCE Phono 1 and 2 47kl2 and 50pF AUX, Tape 1 and 2 47kohm OUTPUT IMPEDANCE Main Out less than 100ohm (to operate into 5kohm or greater) Line Out 600ohm (to operate into a 600ohm line) Headphone 8ohm Tape Out less than 200ohm (to operate into 5kohm or greater) EQUALIZER CONTROL RESPONSE Center Frequencies 30, 750, and 10 kHz Boost and Cut ± 12 dB AM SECTION SENSITIVITY 75µV IHF with external antenna SIGNAL TO NOISE RATIO 45 dB minimum IHF or 55 dB at 100% modulation FREQUENCY RESPONSE + 0 ~ 6 dB from 20 Hz to 3500 Hz HARMONIC DISTORTION 0. 8% maximum at 30% modulation ADJACENT CHANNEL SENSITIVITY 30 dB minimum IHF IMAGE REJECTION 65 dB minimum from 540 kHz to 1600 kHz FM SECTION USABLE SENSITIVITY 2µV (11. 2dBf) IHF QUIETING SENSITIVITY 5µV(19. 1dBf) IHF -50dB(Mono) 50µV (39. 5dBf) IHF -50 dB (Stereo) SIGNAL TO NOISE RATIO 70 dB IHF minimum both Mono and Stereo HARMONIC DISTORTION 0. 18% (Mono) IHF maximum 0. 38% (Stereo) IHF maximum ALTERNATE CHANNEL SELECTIVITY 75 dB IHF minimum IMAGE REJECTION 100 dB IHF minimum STEREO SEPARATION 45 dB minimum at 1 kHz GENERAL INFORMATION POWER REQUIREMENT 120 Volts 50/60 Hz, 45 Watts SEMI CONDUCTOR COMPLEMENT 24 Bipolar Transistors 18 Field Effect Transistors 62 Diodes 24 Integrated Circuits MECHANICAL INFORMATION SIZE Front panel measures 16 inches wide (40. 6 cm) by 5 7/16 inches high (13. 8 cm). Chassis measures 14 3/4 inches wide (37. 5 cm) by 4 13/16 inches high (12. 2 cm) by 13 inches deep (33 cm), including connectors. [. . . ]