Preface u s e r ’ s m a n tm u a l
Thank you—to you the MartinLogan owner, for loving what we do, and for making it possible for us to do what we love. Serial Numbers: _______________ / _______________ Record your serial numbers here for easy reference. You will need this information when filling out your warranty registration. Preface’s serial number is located near the bottom of the backplate and on the shipping container. Each individual unit has a unique serial number.
Contents This product complies with all applicable European directives. Applicable directives: EMC directive 2004/108/EEC 1 The product will not cause electromagnetic interference. 2 The product is not adversely affected by electromagnetic interference.
Introduction & Installation in Brief Introduction Installation In Brief Congratulations! You have invested in a new world of high-performance audio! We know you are eager to hear your Preface speakers, so this section is provided to allow fast and easy set up. Once you have them 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 possible performance from this most exacting transducer.
Connections Signal Connection Use the best speaker cables you can. The length and type of speaker cable used in your system will have an audible effect. Under no circumstance should a wire of gauge higher (thinner) than #16 be used. In general, the longer the length used, the greater the necessity of a lower gauge, and the lower the gauge, the better the sound, with diminishing returns setting in around #8 to #12.
Placement & Room Acoustics Listening Position Your speakers should be placed approximately two to three feet from the front wall, the wall in front of the listening position, and at least two feet from the side walls. Your sitting distance should be further than the distance between the speakers themselves. You are trying to attain the impression of good center imaging and stage width. There is no correct distance between speakers and listener, but there is a relationship.
detailed and articulate yet not bright and piercing, pianos should have a nice transient characteristic and deep tonal registers. This will give you clues on how to get closer to these ideal virtues. Final Placement After the full break in period, obtaining good wall treatments, and the proper toe-in angle, begin to experiment with the distance from the wall behind the speakers. Move your speaker slightly forward into the room.
Rules of Thumb Hard vs. Soft Surfaces If the front or back wall of your listening room is soft, it might benefit you to have a hard or reflective wall in opposition. The ceiling and floor should follow the same basic guideline as well. However, the side walls should be roughly the same in order to deliver a focused image. This rule suggests that a little reflection is good.
Home Theater It had long been the practice of stereo buffs to connect their television to a 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, it was still mono and limited by the broadcast signal. In the late 1970’s and early 1980’s two new home movie formats became widely available to the public: VCR and laser disc. By 1985, both formats had developed into very high quality audio/video sources.
ATF (Advanced Thin Film) ATF Operation The MartinLogan ATF transducer (based on RADIA planar technology) consists of a micro-thin, low-mass Kaladex diaphragm with an ultra-light, etched conductive aluminum surface suspended between two high field strength neodymium super magnet arrays (see figure 4). When an electrical current (music signal) passes through the etched aluminum on the diaphragm's surface it is simultaneously pulled towards one of the neodymium arrays and pushed away from the opposing array.
FAQ & Troubleshooting Frequently Asked Questions Troubleshooting How do I clean my speakers? Just use a dust free cloth or a soft brush to remove the dust from your speakers. We recommend a specialty cloth (available at the Xtatic shop at www.martinlogan. com) that cleans your speakers better than anything else we have tried. Do not spray any kind of cleaning agent on or in close proximity to the ATF element. Output • Check that all your system components are turned on.
General Information Specifications* System Frequency Response: 35–20,000 Hz ± 3db Sensitivity 92 dB/2.83 volts/meter Impedance 4 ohms Crossover Frequency 2,200 Hz Components Air core coils and large steel laminate inductor, polyester film capacitors in series and low DF electrolytic capacitors High Frequency Driver 1.5” x 2.25” (3.8cm x 5.7cm) ATF Transducer Woofer Type Three 6.5” (16.5 cm) cast basket, paper-cone, non-resonant asymmetrical chamber format.
Dimensional Drawings Dimensional Drawings 13
Glossary of Audio Terms AC. Abbreviation for alternating current. DC. Abbreviation for direct current. Active crossover. Uses active devices (transistors, IC’s, tubes) and some form of power supply to operate. Diffraction. The breaking up of a sound wave caused by some type of mechanical interference such as a cabinet edge, grill frame or other similar object. Amplitude. The extreme range of a signal. Usually measured from the average to the extreme. Arc.
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 is measured in henrys. Inductor. A device designed primarily to introduce inductance into an electrical circuit. Sometimes called a choke or coil. Linearity. The extent to which any signal handling process is accomplished without amplitude distortion. Midrange. The middle frequencies where the ear is the most sensitive.
® Lawrence, Kansas, USA tel 785.749.0133 fax 785.749.5320 ©2008 MartinLogan. All rights reserved. www.martinlogan.com Rev.
