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MartinLogan Center Channel speaker manual

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Table of contents for the manual

  • Page 1

    T HEA TER TM user ’s manual c l s e l e c t r o s t a t i c M ART I N L OGA N[...]

  • Page 2

    2 Contents C ONTENTS Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Installation in Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 3

    Installation in Brief 3 I NST ALLA TION IN B RIEF W e know you are eager to hear your new Theater center channel, so this section is provided to allow fast and easy set up. Once you have it operational, please take the time to read, in depth, the rest of the information in this manual. It will give you perspective on how to attain the greatest poss[...]

  • Page 4

    4 Introduction I NTRODUCTION Congratulations! Y ou have invested in a new world of home theater! The MartinLogan Theater represents the culmination of an intensive, dedicated group research program directed toward establishing a world class reference monitor utilizing leading-edge technology , without compromising durability , reliability , craftsm[...]

  • Page 5

    Because your MartinLogan Theater uses an internal power supply to energize its electrostatic cells with high-voltage DC, it must be connected to an AC power source. F or this reason it is provided with the proper IEC standard power cord. This cords should be firmly inserted into the AC power receptacles on the rear connection panel of th e speaker [...]

  • Page 6

    6 Installation F or optimum performance the Theater must be tilted on its stand towards the main listening position and directed towards the audiences ears (see figure 3). After you have placed your Theater in its final location, loosen the 2 knobs located on the stand arm, pivot the Theater towards the main listening position, and then re-tighten [...]

  • Page 7

    Stand Removal and Installation 7 NOTE: The Theater is intended to be used with its stand attached in almost all installation options. Stand Removal and Installation instructions are provided in case you are using a custom installation that does not require the use of the stand. Removing the Stand 1. Support the Theater body by placing the shipping [...]

  • Page 8

    8 Mounting the Theater On A Wall M OUNTING THE T HEA TER O N A W ALL WARNING! Installing the Theater on the wall requires 2 people. Do not try this alone. Mounting the Theater on a wall requires a mini- mum use of 1 lag bolt sunk directly into a stud and 2 wall anchors. If you are able to engage more than 1 stud with a lag bolt when mounting the Th[...]

  • Page 9

    Mounting the Theater On A Wall 9 Figure 7. Hardware included with the Theater . Figure 8. The Theater mounted in various stud configurations. F ront View . Please note, to simplify this illustration, the stand is shown without the Theater attached. When mounting the Theater , the stand should not be removed . The Lag Bolts, W alls, and Z-Brackets a[...]

  • Page 10

    10 Mounting the Theater On A Wall 4. Using a level, vertically measure down from point B 4 1 / 16 inches (10.3 cm) and mark this point (point E, see figure 9). 5. If point E is on, or horizontally within 2 1 / 2 inches (6.3 cm) of a stud: Using a level, mark a point (point F , see figure 9) hori- zontal to P oint E on the stud that is within 2 1 / [...]

  • Page 11

    Dispersion Interactions 11 The convex electrostatic panel launches a 30 degree dis- persion pattern when viewed from above. This horizontal dispersion field gives you a choice of good seats for the performance while minimizing interaction with side walls (see figure 10). As you can see below (See figure 11), your Theater speak- er projects a contro[...]

  • Page 12

    ó12 Dispersion Interactions Figure 12– 13. As can be seen here, point source concepts invite a great deal of room interaction. While delivering good frequency response to a large listening audience, imaging is consequently confused and blurred. Figure 14– 15. Even though they suffer from “venetian blind” effect, angled multiple panel speak[...]

  • Page 13

    H OME T HEA TER Home Theater 13 It had long been the practice of stereo buffs to connect their television to the stereo system. The advantage was the use of the larger speakers and more powerful amplifier of the stereo system. Even though the sound was greatly improved, i t was still mono and limited by the broadcast signal. In the late 1970’s an[...]

  • Page 14

    14 Electrostatic Advantages How can sound be reproduced by something that you are able to see through? Electrostatic energy makes this possible. Where the world of traditional loudspeaker technology deals with cones, domes, diaphragms and ribbons that are moved with magnetism, the world of electrostatic loudspeakers deals with charged electrons att[...]

  • Page 15

    Since the beginning of audio, achieving smooth dispersion has been a problem for all loudspeaker designers. Large panel transducers present even more of a challenge because the larger the panel, the more directional the dispersion pattern becomes. F ull range electrostats have long been one of the most problematic transducers because they attain th[...]

  • Page 16

    16 Electrostatic Loudspeaker History In the late 1800s, any loudspeaker was considered exotic. T oday , most of us take the wonders of sound reproduction for granted. It was 1880 before Thomas Edison had invented the first phonograph. This was a horn-loaded diaphragm that was excited by a playback stylus. In 1898, Sir Oliver Lodge invented a cone l[...]

  • Page 17

    Electrostatic Loudspeaker History 17 In 1947, Arthur Janszen, a young Naval engineer , took part in a research project for the Navy . The Navy was interested in developing a better instrument for testing microphone arrays. The test instrument needed an extremely accurate speaker , but Janszen found that the cone speakers of the period were too nonl[...]

  • Page 18

    18 Frequently Asked Questions F REQUENTL Y A SKED Q UESTIONS How do I clean my speak ers? Just use a dust free cloth or a soft brush to remove the dust from your speakers. W e recommend a specialty cloth (available through the XStatic shop at www .martinlogan.com) that cleans your speakers better than anything else we have ever tried. Do not spray [...]

  • Page 19

    Frequently Asked Questions 19 Will excessive smok e or dust cause any problems with my electrostatic speak ers? Exposure to excessive contaminants such as smoke or dust may potentially affect the performance of the electrostatic membrane, and may cause discoloration of the diaphragm membrane. When not in use for extended periods, you should unplug [...]

  • Page 20

    20 Troubleshooting T ROUBLESHOOTING No Output •Check that all your system components are powered on. •Check your speaker wires and connections. •Check all interconnecting cables. W eak Output, Loss of Highs • Check the power cord. Is it properly connected to the speaker? • Is the Theater properly adjusted towards the listening position? R[...]

  • Page 21

    The Theater hybrid speaker system consists of a broad-range single element electrostatic transducer integrated with a quick-response woofer . This approach takes advantage of the benefits that both technologies have to offer . Dispersion is a controlled 30 degrees. This was achieved by curving the electrostatic transducer element itself , an elegan[...]

  • Page 22

    AC. Abbreviation for alternating current. Active crossover . Uses active devices (transistors, ICs, tubes) and some form of power supply to operate. Amplitude. The extreme range of a signal. Usually measured from the average to the extreme. Arc. The visible sparks generated by an electrical discharge. Bass. The lowest frequencies of sound. Bi-Ampli[...]

  • Page 23

    Inductance. The property of an electrical circuit by which a varying current in it produces a varying magnetic field that introduces voltages in the same circuit or in a nearby circuit. It i s measured in henrys. Inductor . A device designed primarily to introduce inductance into an electrical circuit. Sometimes called a choke or coil. Linearity . [...]

  • Page 24

    2101 Delaware Street, Lawrence, Kansas 66046, USA tel 785.749.0133 fax 785.749.5320 www.martinlogan.com c l s e l e c t r o s t a t i c M ART I N L OGA N ©2000 MartinLogan, All rights reserved Rev. #071300[...]