User manual MCINTOSH MX110

[. . . ] STEREO TUNER PREAMPLIFIER MX 11O 1 1 5 10 10 10 10 11 12 12 13 13 14 GENERAL DESCRIPTION TECHNICAL DESCRIPTION FRONT PANEL FACILITIES INSTALLATION CONNECTING AC Connections AC Power Connection Input Connections Output Connections Antenna Connections CONTENTS OPERATING INSTRUCTIONS Balancing a Stereo System Adjusting Phase Balancing Loudness Between Program Sources Adjusting the Balance Control After the System has been Balanced Adjusting for Special Effects Listening to Monophonic FM Program Listening to MPX Stereo Listening to a Stereo Record Listening to Monophonic Records Listening to Tape Decks Listening to Stereo Tape Machine Operating Curves GUARANTEE 14 15 15 15 16 16 16 16 17 18 20 OWNER'S MANUAL MX11O MX110 TUNER PREAMPLIFIER GENERAL DESCRIPTION The MX110 combines in one unit an extremely low-distortion preamplifier with a highly sensitive FM multiplex stereo tuner. Every desirable feature of a tuner and a preamplifier is included in this design. Interstation noise suppression, tuning indicator, FM multiplex indicator, individual channel bass controls, individual channel treble controls, electronic phase switch have all been engineered into the MX110. The INPUT SELECTOR gives you a choice of six different program sources. [. . . ] The turntable is protected by this arrangement because it is necessary to turn off the turntable with its own control switch so that no damage will result to the drive system. AC POWER Plug the AC power cord in 105 volt to 125 volt, 50 to 60 cycle power line. The power used by the MX110 is 75 watts. Figure 17. AC Connections. 10 INPUT CONNECTIONS The MX110 provides six separate program inputs controlled by the INPUT SELECTOR switch. One input for tape monitor or tape comparison is controlled by the TAPE MONITOR switch. The input program connections should be made in accordance with Table 1. Figure 18. MX110 Input Connections (Back Panel). If a cartridge requires less than 47, 000 ohms load impedance, a resistor can be added across the terminals of the cartridge Desired Impedance 47, 000 ohms (47K) 37, 000 ohms (37K) 27, 000 ohms (27K) 15, 000 ohms (15K) 6, 800 ohms (6. 8K) to achieve the correct termination. The following chart may be used as a guide: Resistor Across Input No Resistor 180, 000 ohms (180K) 62, 000 ohms (62K) 22, 000ohrns (22K) 8, 200 ohms (8. 2K) Table 1. Input Connections CONNECTION TAPE MONITOR AUX FUNCTION Tape input operates with tape machines containing their own playback preamplifier. The auxiliary input accepts any auxiliary service requiring flat frequency response, such as a T. V. set, etc. INPUT SENSITIVITY 0. 3 volts 0. 3 volts INPUT IMPEDANCE 100, 000 ohms (100K) 200, 000 ohms (200K) 220, 000 ohms (220K) 47, 000 ohms (47K) TAPE HEAD PH-1 MAG & PH-2 MAG. This jack is used with a tape deck that does not contain its own 2. 5 millivolts playback preamplifier. (25/1000 of 1 volt) These jacks are to be used with magnetic cartridges. These jacks are to be used with a constant amplitude cartridge such as a crystal, ceramic, or frequency-modulated device. 3 millivolts (3/1000 of 1 volt) 0. 1 volts PH-1 XTAL 220 mmf in series with 56K 11 OUTPUT CONNECTIONS There are three sets of outputs on the left half of the back panel. (See Figure 19. ) One pair is marked MAIN. The third is a single jack marked L+R OUTPUT. The MAIN output connects to power amplifiers (Figure 19). The MAIN jacks are fed from cathode followers. Longer cables than are normally supplied can be connected between the MX110 and the amplifiers. The length of the cable is limited by the capacity of the cable. The total capacity must not exceed 1000 mmf. For instance: cables with a capacity of 25 mmf per foot may be 40 feet long; 13. 5 mmf per foot cable may be 75 feet long. The input impedance of the amplifiers should be 100, 000 ohms or greater. [. . . ] (See page 15 ADJUSTING FOR SPECIAL EFFECTS. ) 5. Place the LF rumble filter control in the OUT position. (See page 15 ADJUSTING FOR SPECIAL EFFECTS. ) 6. (See page 15 ADJUSTING FOR SPECIAL EFFECTS. ) 7. [. . . ]