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User's Manual
The Sequel II Speaker System
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Important Contents Your Sequel II speakers are provided with an automatic Limited 90 Day Warranty coverage. Introduction 3 You have the option, at no additional charge, to receive Limited 3 Year Warranty coverage. To obtain Installation in Brief 4 Limited 3 Year Warranty coverage you need only complete and return the Certificate of Registration that was included with your speakers to Martin-Logan, The Electrostatic Concept 5 within 30 days of purchase. Martin-Logan may not honor warranty se
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Introduction Congratulations, you have invested in one of the world’s tooled, high-grade steel, the panel is then coated with a premier loudspeaker systems! special polymer that is applied via a proprietary electro- static deposition process. This panel assembly houses a The Martin-Logan Sequel II represents the culmination of an membrane 0.0005 of an inch thick! Ruggedly constructed intensive, dedicated group research program directed and insulated, as much as 200 watts of continuous power towa
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Installation in Brief We know you are eager to hear your Step 1: Unpacking Step 1: Unpacking Step 1: Unpacking Step 1: Unpacking Step 1: Unpacking new Sequel II loudspeakers, so this section is provided to allow fast and Remove your new Sequel II speakers from their packing. easy set up. Once you have them operational, please take the time to read, in depth, the rest of the informa- Step 2: Placement Step 2: Placement tion in this manual. It will give you Step 2: Placement Step 2: Placement
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The Electrostatic Concept How can sound be reproduced by something that you are major contributor to the sonic purity of the electrostatic able to see through? Electrostatic energy makes this possible. concept due to its exceptional linearity and low distortion. Where the world of traditional loudspeaker technology Since the diaphragm of an electrostatic speaker is deals with cones, domes, diaphrams and ribbons that are uniformly driven over its entire area, it can be extremely moved with magnet
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History In the late 1800’s, any loudspeaker was considered exotic. After a short time, Rice and Kellogg had narrowed the field Today, most of us take the wonders of sound reproduction of “contestants” down to the cone and the electrostat. The for granted. outcome would dictate the way that future generations would refer to loudspeakers as being either “conventional”, It was 1880 before Thomas Edison had invented the first or “exotic”. phonograph. This was a horn-loaded diaphragm that was excited
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In 1947, Arthur Janszen, a young Naval engineer, took part load that some amplifiers did not like, its dispersion was in a research project for the Navy. The Navy was interested very directional, and its power handling was limited to in developing a better instrument for testing microphone around 70 watts. As a result, many people continued to use arrays. The test instrument needed an extremely accurate box speakers with cones. speaker, but Janszen found that the cone speakers of the In the earl
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Martin-Logan Exclusives Full Range Operation Full Range Operation Full Range Operation Full Range Operation Full Range Operation The most significant advantage of Martin-Logan's Instead, these drivers must be designed to operate exclusive transducer technology reveals itself when you within narrow, fixed bandwidths of the frequency range look at examples of other loudspeaker products on the and then combined electrically so that the sum of the market today. parts equals the total signal. While n
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Curvilinear Line Source Curvilinear Line Source Vapor Deposited Film Vapor Deposited Film Curvilinear Line Source Curvilinear Line Source Curvilinear Line Source Vapor Deposited Film Vapor Deposited Film Vapor Deposited Film The diaphragm material used in all Martin-Logan Since the beginning of Audio, achieving smooth disper- speakers employs an extremely sophisticated conductive sion has long been a problem for all loudspeaker designers. Large panel transducers present even more of surface that
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Operation AC Power Connection AC Power Connection Signal Connection Signal Connection AC Power Connection AC Power Connection AC Power Connection Signal Connection Signal Connection Signal Connection Because your Martin-Logan Sequel II's use an internal power Use the best speaker cables you can! The length and type supply to energize their electrostatic cells with high-voltage of speaker cable used in your system will have an audible DC, they must be connected to an AC power source. For this eff
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Warning! Warning! Warning! Warning! Warning! Turn your amplifier off before making or breaking any signal connections! The chassis is earth grounded and can present a short circuit to your amplifier if contact is made! Standard Connection Standard Connection Standard Connection Standard Connection Standard Connection Please take note of the jumper clips installed under the 5-way binding posts. These clips attach the high and low frequency sections of the crossover together. Leaving these in plac
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Operation Passive Bi-Amplification Passive Bi-Amplification Passive Bi-Amplification Passive Bi-Amplification Passive Bi-Amplification For those of you that desire ultimate perfor- mance, the Sequel II may be passively bi- amplified using the existing internal passive crossover elements. WARNING! WARNING! WARNING! WARNING! WARNING! Only after the jumper clips are removed may you connect individual runs of speaker cable from your amplifiers to the High-pass and Low-pass Signal Input binding posts
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Bass Control Switch Bass Control Switch Bass Control Switch Bass Control Switch Bass Control Switch On the rear panel of the Sequel II electronics module, below the Signal Input Signal Signal Input Input, is a two Signal Input Signal Input position Bass Control Bass Control Bass Control switch that allows Bass Control Bass Control you to select the type of low frequency response you desire. The 0 dB 0 0 dB dB position is considered the normal 0 dB 0 dB setting for most rooms. However, if you fe
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Room Acoustics Y Your R our Room oom Y Y Your R our R our Room oom oom this wave experience like a 3 dimensional pool with This is one of those areas that requires both a little waves reflecting and becoming enhanced depending background to understand and some time and experi- on the size of the room and the types of surfaces in the mentation to attain the best performance from your room. system. Remember, your audio system can literally generate all Your room is actually a component and an impo
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Rules of Thumb Rules of Thumb Rules of Thumb Rules of Thumb Rules of Thumb Break-up Objects Break-up Objects. Objects with complex shapes, such Break-up Objects Hard vs. Soft Surfaces Hard vs. Soft Surfaces. If the front or back wall of your Hard vs. Soft Surfaces Break-up Objects Break-up Objects Hard vs. Soft Surfaces Hard vs. Soft Surfaces as bookshelves, cabinetry, and multiple shaped listening room is soft, it may benefit you to have a walls can help break up those sonic gremlins and hard o
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Room Acoustics and Dispersion Interactions Controlled Horizontal Dispersion Controlled Horizontal Dispersion Controlled Vertical Dispersion Controlled Vertical Dispersion Controlled Horizontal Dispersion Controlled Horizontal Dispersion Controlled Horizontal Dispersion Controlled Vertical Dispersion Controlled Vertical Dispersion Controlled Vertical Dispersion Your Sequel II's launch a 30 degree dispersion pattern As you can see from the illustrations, your Sequel II when viewed from above. This
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Three Major T Three Major Types of Dispersion ypes of Dispersion Three Major T Three Major T Three Major Types of Dispersion ypes of Dispersion ypes of Dispersion In the field of loudspeaker design, it is a known fact that Historically, most attempts to achieve smooth dispersion as the sound wave becomes progressively smaller than from large flat panel transducers resulted in trade-offs. the transducer producing it, the dispersion of that wave After exhaustive testing of these different solution
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Placement Listening P Listening Position osition The W The Wall Behind the Speak all Behind the Speakers ers Listening P Listening P Listening Position osition osition The W The W The Wall Behind the Speak all Behind the Speak all Behind the Speakers ers ers By now your speakers should be placed approximately 2 The front wall (the wall behind your speakers), should not to 3 feet from the front wall (wall in front of the listening be extremely hard or soft. For instance, a pane of glass position)
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Experimentation Experimentation Experimentation Experimentation Experimentation Tonal Balance. Tonal Balance. Voices should be natural and full, Tonal Balance. Toe-in Toe-in Toe-in. Now you can begin to experiment. First begin by Tonal Balance. Tonal Balance. Toe-in Toe-in cymbals should be detailed and articulate yet not toeing your speakers in towards the listening area and then toeing them straight into the room. You will bright and piercing, pianos should have a nice notice that the tonal ba
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Placement The X The X-tra “ -tra “T Tweek” week” Solid F Solid Footing ooting The X The X The X-tra “ -tra “ -tra “T T Tweek” week” week” Solid F Solid F Solid Footing ooting ooting A major cable company developed the following After living and experimenting with your Sequel II's, you procedure for speaker placement. As a final test of exact will then want to use the spikes included in your owners placement, use these measurements for your speakers kit. The Sequel II will become more firmly plan
