Editions系列

Accent 3

The Project
Producing small loudspeakers with extraordinary performance is a Dynaudio tradition. As early as 1984, Dynaudio created two compact loudspeaker systems which attracted favourable attention because of the innovative technology and performance capabiljties offered. These systems became successful and contributed to the subsequent trend toward small, high quality speakers.

表面工艺

We have continued in this direction, and the Special One is the result of a research project directed at defining the possibilities of small system performance. We wished to know what could be achieved if drivers, crossover filters, and amplifiers are operated under ideal conditions. We had no limitations or commercial requirements, and every problem could be pursued to its solution.
As we became more involved with this investigation, we realized that the results were so interesting that we could not dismantle our prototypes and file away the research for future development, when state of the art reached finally the level of our projections. The decision was made to produce this audiodelicacy for only a few gourmets who could appreciate the experience.

Speaker Driver Selection
The driver units we decided upon were refined and improved until they exceeded anything we had ever done. When we were sure of their laboratory excellence, we began again matching the drivers to the cabinet requirements. Making our own drivers we are able to interface driver and cabinet instead of during in the crossover with countless components.

Woofers
For the low frequency range we have used a special version of the 17 W 75. This woofer has a balanced 1:2 ratio between the diameter of the piston and the diameter of the voice coil. In this case the large voice coil allows very high power handling, and, at higher frequencies, the outer surface of the diaphragm is decoupled acoustically from the inner surface, so the mass of the dispersing surface becomes smaller as the frequency rises. The result is weIl balanced dispersion and phase response that makes possible accurate stereo imaging. The controlled phase and amplitude response in the woofer’+’s upper range is a precondition for a seamless crossover to the high frequency driver. Every Facette is built according to the principle of non-parallel surfaces: the cabinet panels’+’ influence on sound is almost eliminated.

Tweeter
Recently Dynaudio introduced the Esotar 330 D high frequency transducer. This unit was the culimination of many years of development, and it has been used in state of the art systems from several manufacturers. This tweeter’+’s capability was taken into account when developing the Special One. Among the many qualities of special usefulness were the excellent pulse response. This is a result of the resonance damping of the swinging system through the use of a special magnetic fluid in the air gap. Ringing in the response is prevented without affecting the dynamic characteristics of the impulse. This system reduces distortion and phase error to very low levels. The most important aspect of the Tweeter drive unit is an ideally vented magnet system that prevents different pressure potentials among the areas of the chambered interior. The chambered rear system allows for a low resonance frequency and is ideally suited for the demanding but sonically superior 6 dB crossover rolloff.
Every cabinet is created by a master craftsman; you`ll never find a production line on our premises.

Soft Dome
The support material of the dome is made of fine mesh fabric. Before use it is carefully impregnated with a special fluid to give the dome the necessary stability. After mounting the dome and the voice coil in the magnetic system, it is given an additional coating to provide balanced damping and to eliminate resoances. In the lower tweeter frequencies, sound dispersion comes from the entire surface of the dome. But as frequency rises, the top of the dome is decoupled mechanically, and sound dispersion is taken over by the outer areas of the dome surface. This means that moving mass and dispersing surface is reduced. Dispersion and pulse measurements on Dynaudio tweeters conclusively indicate this accurate response. In spite of a trend toward metal domes, Dynaudio has continued to develop the soft dome technology. We know that with metal domes, resonances inherent in the crystal structure of the material create resonances in the response that cannot be avoided. Such resonances are sometimes found above 20.000 Hertz. They are seldom indicated in response tests that are usually terminated before the point of rapidly rising output. These resonances should not be neglected, however. Manufacturers of CD players, for example, are eagerly trying to eliminate small pulse errors around 20 kHz and to filter interference signals at even higher frequencies. They believe that these errors affect the reproduction accuracy.

Crossover Filter
The Special One crossover is responsible for the distribution of the signals between the woofer and the tweeter. But it must also direct a whole series of modifications of the drive response combination. Large coil and premium polypropylene capacitors are required to carefully filter small rest ripples in the response. The reserves of these premium parts provide a sonic stability and tonal balance on any musical material.

Capacitors
For the last several years Dynaudio has been testing for the best film capacitors. We now think we have a special formulation that is clearly better than all other types. Even in those sections of the circuit which are not in the signal path, this capacitor shows a positive sonic influence. By using these capacitors we have improved the high frequency reproduction; the dynamic resolution is sharper, while tendencies toward "sharpness" in sound disappear. The Special One offers ideal conditions: perfect basic properties of the tweeters and perfect electrical response of the capacitors. This combination leads to the detailed reproduction in the tweeter range and stunningly realistic stereo imaging.

Impedance
Before developing the actual filter, the impedance response of the drivers was smoothed with the help of exactly calculated circuits. This not only influences the optimum functioning of the crossover, but it also enhances the cooperation between amplifier and loudspeaker. Even the tweeter’+’s impedance rise above 15 kHz is audible if the drive unit is precise enough to accurately reproduce these frequencies. Because we take so much care in creating a steady impedance response of the driver combination, the phase correction circuit can respond close to its theoretical potential.

First Order Filters
Dynaudio developments are based to a great extent on the application of 6 dB, or first order filters. Often in promotional literature, the impression is given that the use of filters with a high slope, 12 to 24 dB per octave, is a quality feature of loudspeaker systems. This approach has some validity when using drivers of standard construction and a narrow frequency range. Here crossovers with a high slope may help to maintain a smooth frequency response. But on the other hand, the higher the slope of the filter, the worse the pulse response of the drive unit. Since music consists of dynamic signals with many pulses and few pure sine waves, reproduction suffers from filters with a high slope. Therefore, Dynaudio uses only first order filters. Even if this requires highly optimized drive units that are difficult and expensive to manufacture, the musical result shows that it is worth our efforts.

Phase
By means of carefully directed structural parameters the phase response of Dynaudio drivers is optimized. The remaining difference around the overlap of woofer and tweeter are balanced by a very sensitive compensation circuit. This circuit uses only high quality components with narrow tolerances and very fast recovery. Long term stability is also a significant factor in the overall design of the compensation circuit. Until recently academic researchers as well as most system manufacturers have discounted the influence of phase on the sound of a loudspeaker system. But from the very beginning, Dynaudio has considered the phase response of a loudspeaker to be just as important as any other aspect, because it has been a known fact that stereo imaging and rear channel information in quadraphony are based to a large extent on differences in phase. A loudspeaker may have an accurate frequency response, but if its phase response is irregular, the consequence will be blurring, exaggerated musical sounds, or harsh tonalities.

Impedance Correction
Even if all of the aspects discussed above have been carefully observed, the impedance response will still have ripples which can only be controlled by an impedance compensation network. When properly constructed and employed, the impedance response between 100 Hz and 1.000.000 Hz is linear at 4 ohms. The connected amplifier is presented a nearly pure resistive load. The power amplifier can be operated under ideal conditions. Usually a loudspeaker is a difficult load for an amplifier, because complex signal portions generated by the capacitors and inductors require high circuit stability. But in the Dynaudio engineering approach, the loudspeaker system presents the ideal load for the amplifier and the sonic combination is always as good as the potential of the electronics.

Subjective And Objective Evaluation
Most audio enthusiasts have encountered components that share almost identical structure, design, and performance levels yet exhibit very different sonic properties. It is the fuel that fires the quest for audio excellence. This is a phenomenon that we have often confronted in crossover design. There are several paths that will yield a similar response measurement, but in listening tests the products will have a personal signature that seems out of proportion to the design differences. In the design of the Special One two different technical approaches were followed, and then each was refined for precise measurable fidelity to the original signal. At each step there were extensive listening tests. These tests were performed independently, but as they progressed the two designs began to resemble each other in ways the design team had not foreseen. For example, for the first time ever we used a new PC board layout that had no conductor paths. All components are connected directly or with large cable diameters. Inductance coupling of the coils on the copper coating was carefully avoided as well. This was an important experience because we recognized that many results cannot be generalized beyond the immediate experiment. Dynaudio products will continue to be designed experimentally; the designs will be ratified through patient critical listening.

Inductors
Well designed inductors with large wire diameters can often clearly improve the accuracy of response, During the design of the Speacial One systematic tests with different coil formulation were made. We were able to learn that "The thicker the wire, the better the results" was often not the case. We found that the Q (or quality) of the inductor influences the sonic results at high frequency range, is an important contributor to the fidelity of the system. Owing to this experience, Dynaudio developed coils which have several conductors with different diameters in parallel, an advancement we have named CWC coils. Application of these coils makes possible a precise bass reproduction with more dynamic range and less coloration. We believe CWC coils will play an important role in all new Dynaudio products, though they must be part of the original filter design and loudspeaker project in order for the improvement to be maximized.

The Result
The Special One sounds like no loudspeaker has in the past. It has no special musical material but allows you to enjoy all music to its fullest potential. It is unobtrusive but intense. For those audio enthusiasts who are looking to improve the chain of high fidelity reproduction, the Special One will certainly stand up to a detailed evaluation; for those who love music the Special One will be a joyful experience.

技术说明

• Technical Specifications

• Sensitivity (2.83 V/1 m):

• 82 dB

• IEC Long Term Power Handling:

• 150 W

• Impedance:

• 4 Ohms

• Weight:

• 9 kg

• Dimensions (W x H x D):

• 220 x 400 x 280 mm

Consequence

"Reference Loudspeakers May Come and Go; The Consequence remains".

表面工艺

The privileged position Dynaudio loudspeakers occupy, is confirmed in an impressive way by the Consequence.

Following a consistent concept and its realization, it is presented to music lovers who require the best, to aesthetes who possess a sensitive feeling for this uncompromisingly harmonic conversion of quality into a functional design; it is a loudspeaker for the few who are able to fulfil their individual demands and who are willing to do so.

The Consequence by Dynaudio achieves absolute high end. It represents uncompromising technology, and creative innovation on the highest possible level; it possesses qualifications which - together with difficult psycho-acoustical findings - come into full effect at the point that is the final stage for many loudspeakers: the point of truth. Because truth is and will always be the only universally valid standard for the quality of reproduction. The technical specifications are regarded as top quality by any expert. Impressive diagrams, data and curves produced by an oscilloscope, are not the measure of all things, but longlasting, convincing and audible sound reproduction.

We know that the human ear is able to notice even the tiniest sound distortion of modification. It notices imperfections that are often caused by the interaction, i.e. the mutual disturbance of resonances in various parts of the frequency range. The subtle constructive design of the Consequence - the four-chamber enclosure - reliably avoids such problems. On the one hand, the enclosure arrangement provides acoustical resonance decoupling from the floor; on the other hand, it completely prevents interaction of the systems. This is a sophisticated constructional feature that guarantees optimal performance parameters - necessity for an outstandingly demanding loudspeaker.

From the very beginning, Dynaudio has made it a matter of principle to realize integrated concepts. All components are the result of our own research, development, and manufacture. Not only does this include the component loudspeakers with all details but also the fine and noble enclosures, the reinforcement measures, and damping methods. All control processes, attack and decay response, and all interactions of the loudspeaker chassis have been considered in the whole concept.

Our loudspeaker systems have established and confirmed Dynaudio’+’s excellent reputation all over the world. And it is our manufacture of loudspeaker systems on our own that led to a certain independence and in many cases to new, often unusual findings. For instance, we integrated into the Consequence, apart from the high-quality tweeter and midrange systems, a woofer with a diameter of 30 cm (twelve inches) equipped with a huge and rapidly reacting 100 mm (four inches) voice coil made completely of aluminium. Having made extensive calculations and extensive hearing tests, we positioned the woofer on top to compensate for the different delay times of the systems: all signals reach the listener’+’s ear at exactly the same point of time which is of decisive influence on the sound homogeneity.

Unconventional research and development, extraordinary constructional efforts and absolutely uncompromising conversion of the findings into "audio truth", have made the name of Dynaudio a synonym for strong commitment, for innovative, often revolutionary ideas and research approaches, and finally excellent loudspeaker concepts. The Consequence emphasizes all of these features in a very impressive way. It offers superb stereo imaging, instruments can be exactly located, and the speaker is unobtrusive in a pleasant and agreeable way: it is areal revelation.

Most of all, it is the Consequence’+’s complexity that impresses the trade journals and audio purists who consider this loudspeaker a shining example of loudspeaker artistry for the high degree to which the striving for absolute sound reproduction can be put into musical practice. Individual performance features, such as nearly unlimited power handling, pulse fidelity, flat impedance response, linear frequency response, phase- corrected crossover tharacteristics describe details, but cannot convey the Consequence’+’s overall fascination.

The Consequence is and will always be an outstanding experience; it will always be a technical masterpiece that cannot be judged by conventional criteria but sets standards and criteria of its own. The degree of brilliance, dynamic range, bass response, transparency, definition and naturalness realized by this loudspeaker goes beyond the scope of traditional ideas, technology, and functional aesthetics. It is unique, independent, unmistakable, full of character, down to the last detail.

It is a loudspeaker which really emphasizes new values, a loudspeaker which is equiped with massive chassis rings, not for the sheer sake of show, but for proven acoustical concepts; it is a matter of course that such a loudspeaker possesses a selected and precious enclosure and first-dass manufactured surfaces. Plainly speaking it integrates best craftmanship and outstanding acoustical properties: quality in the true sense of this word.

It is really no wonder that the Consequence has become a masterpiece and, furthermore, a "collector’+’s prize" of increasing value.

技术说明

• Technical Specifications

• Sensitivity (2.83 V/1 m):

• 83 dB

• IEC Long Term Power Handling:

• 250 W

• Impedance:

• 4 Ohms

• Frequency Response:

• 20 Hz - 30 kHz

• Weight:

• 82 kg

• Dimensions (W x H x D):

• 400 x 1250 x 600 mm

Crafft

NEAR-FIEW STUDIO MONITOR
With the DYNAUDIO CRAFFT a monitor has been developed which - at first sight - resembles a lot of other solutions, however, stands out clearly against designed monitors.

表面工艺

产品手册 

The Crafft offers a two-way bass reflex design with very compact dimensions. When using a small monitor, it often pecurs that poor low-range and dynamic properties have to be deliberately taken into consideration. This compromise is not necessary in case of the Crafft. The utmost sound quality and outstanding dynamics are achieved, complemented by high reliability and power rating.

OWN DRIVER DEVELOPMENT
For many years now, DYNAUDIO has examined how to guarantee high standards of sound quality in places where only a minimum of space is available. Through our own research and development efforts as well as the entire production of all loudspeaker drivers have discovered completely new possibilities. More than 12 years of experience in manufacturing high-quality drivers are the basis for the development of the CRAFFT.

75-mm-VOICE COIL
The woofer is equipped with a 75-mm-voice coil. This diameter provides optimum drive of the diaphragm and guarantees enough headroom with regard to power rating. The magnet system is especially designed for the computer-optimized bass reflex design of the CRAFFT. The result: bass dynamics and precision hardly imaginable in this class.

OWN DIAPHRAGM PRODUCTION
The woofer diaphragm is made of self-developed material which is based on polypropylene. These diaphragms manufactured by ourselves are characterized by absence of distortion and a minimum of partial oscillations due to excellent internal damping character of the material. The diaphragm geometry results in a harmonius and uniform pattern. Measurements taken at an angle of 30° or 60° show nearly no difference to on-axis measurements. Especially for studio work this fact is of decisive importance.

TWEETER THAT SETS NEW STANDARDS
The tweeter of the CRAFFT is the new ESOTAR T 330 D. This dome-type tweeter was developed for professional application. It reproduces even the finest details with breathtaking authenticity and achieves unimaginable dynamics and power rating. DYNAUDIO has developed a new measurement technique which displays the frequency response at various power levels. These measurements show that the tweeter can handle transients up to 2,000 watts without compression.

MANUFACTURE UNDER LAB CONDITIONS
The ESOTAR T 330 D is manufactured under laboratory conditions. Most of the work processes are made by engineers and technicians. During each phase of production, careful quality checks are made. The com-plete tweeter has to pass a final examination by computer-supported measurements afterwards stored with the serial number. Thus, the properties of each driver can be found out even after years, e. g. if are placement part is required. Tolerance between two tweeters is maximum- 0.5 dB. Provisions are made for tough continuous operation: the heat produced by the voice coil is dissipated to the magnet system with the help of a magnetic cooling liquid. The magnet system is tightly connected with the large front plate which dissipates the heat to the outside and thus acts like a huge heat sink. Temperature influences are often underestimated. But nearly all mechanical parameters of the drivers and therefore the entire sound characteristics depend on the temperature. Furthermore, short peaks with high levels result in a compression effect, due to changes of resistance in the coil which are - again - depending on the temperature. Mechanical damping of the moving system which provides ideal pulse response is another essential feature of this liquid.

FILTER TECHNOLOGY
The frequency crossover of the CRAFFT is exclusively made from components not changing their characteristics by aging processes. In order to fully exploit the pulse response of the drivers, only first-quality polypropylene capacitors are employed. When developing the drivers, DYNAUDIO takes the crossover circuitry into consideration. This is the only way to adapt all parameters to each other carefully.

PURE MUSIC
The components of the CRAFFT have been developed to ensure that the loudspeaker does not create its individual sound characteristics. Any effects have been avoided. The DYNAUDIO CRAFFT is a monitor that displays the musical events down to the last detail and thus creates objective and impartial starting conditions for a perfect recording. When judging a recording, the listener may concentrate entirely on the recorded music and should not consider the characteristics of the monitor.

ADJUSTMENTS
The CRAFFT is equipped with two switches enabling the high-range and the mid-range to be adjusted by: ±1.5 dB each. Thus adapting the loudspeaker to room acoustics and to the listener’+’s position.

CONNECTION
The CRAFFT offers XLR and banana jacks as well as a special OCOS input.

CABINET
The cabinet is made of highly compressed MDF boards which - owing to various damping materials and a ’+’Sandwich’+’ design - suppresses resonances efficiently. The surface is coated with an extremely wear-resistant Nextel finish.

技术说明

• Technical Specifications

• Sensitivity (2.83 V/1 m):

• 86 dB

• IEC Long Term Power Handling:

• 150 W

• Impedance:

• 4 Ohms

• Weight:

• 10,9 kg

• Dimensions (W x H x D):

• 220 x 400 x 280 mm

Facette 

The Truth about the Facette. A milestone in the history of loudspeaker design. "Dynaudio speakers are renowned for their outstanding quality and we wanted to reflect the same innovation and originality in the Facette. The result is a fine aesthetic geometry in complete harmony with high acoustic performance. A delicately tuned and balanced instrument to give pleasure to the eye as well as the ear."Frederick Rickmann"

表面工艺

Most things are either truthful or beautiful. Not a pleasant alternative for the loudspeaker designer. If you give in to the whims of the designer, the result may (occasionally) be pleasing to the eye; trying to listen to music through the resultant concoction it will be disclosed as the travesty such design speakers usually are.

Giving free rein to engineers, on the other hand, often leads to speaker shapes even the most dedicated music lover won’+’t want to tolerate in his living room (who feels at home with a coffin?). We at Dynaudio have applied our renowned Danish thoroughness to this apparent dichotomy of aesthetic and acoustic requirements and decided to go back to basics.
We initiated a four year research program, combining the talents of our justly renowned industrial designer Frederick Rickmann with those of our equally famous engineers Mark Thorup and Anders Lassen. They came back with a revolutionary design idea: without parallel walls, there can be no standing waves inside the cabinet!

The no less revolutionary result: a loudspeaker as fascinating to the eye of the interior designer as to the ear of the audiophile. A speaker which combines truthful detail of finish with truthful detail in reproduction, and which realizes a true ideal once said to be impossible to reach. Despite all this - or maybe because of all this - it would be a shame just to put the Facette into some Museum of Modern Art. Put it where it can prove its exceptional qualities in everyday use.

Every Facette is built according to the principle of non-parallel surfaces: the cabinet panels’+’ influence on sound is almost eliminated.

Every part that goes into the Facette is developed and built by ourselves.

Every cabinet is created by a master craftsman; you`ll never find a production line on our premises.

Every pair of Facette is unique: finished in mirror-image veneers which are never separated during the three months of manufacture.

Every Facette is checked 82 times for finish and sound quality: by hand, and with computer programs developed in-house.

Every Facette will be listened to before delivery by our legendary chief tester, Sven-Erik Nielsen: nothing but truthful sound will do.

We wouldn’+’t want to contradict our company motto: "Danes don’+’t lie."

技术说明

• Technical Specifications

• Sensitivity (2.83 V/1 m):

• 84 dB

• IEC Long Term Power Handling:

• 150 W

• Impedance:

• 4 Ohms

• Frequency Response:

• 40 Hz - 22 kHz

• Weight:

• 14 kg

• Dimensions (W x H x D):

• 280 x 1035 x 225 mm

Micron 

Why the Micron is so small.
Dynaudio′s legendary engineering department has designed the Micron to achieve the hitherto unachievable: true high end sound in a wall- or shelf-mountable package. With other small high quality speakers, mounting close to a wall leave the bass bloated and boomy. Not so the Micron. Here, a special, controlled bass loading guarantees a precise and well-integrated reproduction of low frequencies. For the first time, the Micron will allow the most uncompromising aficionados of perfect sound reproduction to hear in small and very small rooms what they really want to hear: The truth, and nothing but the truth.

表面工艺

Why the Micron is so beautiful.
There are obvious and not-so-obvious elements of beauty. What you ca see is the Micron’+’s classic, timeless Dynaudio design and the enclosure, meticulously hand-made and clad in the finest real wood veneers. If you want to give your thanks to the man responsible, he’+’s our master craftsman Hugo Nielssen. Chief engineer Sven-Erik Nielsen, on the other hand, is responsible for important things you can’+’t see. He guarantees for the famous Dynaudio quality in finish and materials. With his head. And his signature.

Why the Micron sounds so good (1).
As always at Dynaudio, the Micron’+’s bass driver features a very generously dimensioned motor: a 3" voice coil for a 6" driver gives perfect control even under the most adverse conditions (even drivers twice this size normally have to do with a voice coil only half as large in diameter). The tweeter shares all features of Dynaudio′s famous Esotar and Esotec series, the accepted yardstick for the industry’+’s most reputed designers. It has been carefully adapted for the Micron’+’s design and can reproduce any program, driven by the best electronics, at the highest quality level.

Why the Micron sound so good (2).
For the Micron’+’s enclosure, we took great pains (and a lot of money) to achieve two goals: freedom from resonance and inertia. And we did everything possible to man and computer to prevent the cabinet from modulating the music. The result: not least because of the extremely small surfaces, resonances are much, much lower in amplitude than with most larger speaker - the Micron is, finally, a box which will not superimpose ist own echo on the music. The finishing touch is the ingenious mounting method: a single screw and two spikes (provided) safely mount the speaker to the wall and acoustically decouple it at the same time.

Why the Micron is so rare.
We at Dynaudio make less speakers in a year than some other companies in a week. That’+’s the price we pay for our quality standards: every single Micron, for example, has to pass 85 controls during its manufacture, only to be subjected to another two hours of thorough checking by computer an human ears. Which means, we regret to say, that less people get to enjoy truthful sound than we would ideally like. On the other has, maybe there aren’+’t really that many people who truly deserve this privilege. Another reason why you won’+’t find the Micron in just anybody’+’s home.

Why the Micron is so expensive.
Most loudspeakers are designed to fit a price point, to help marketability. There are quite enough of those loudspeakers around. With the Micron, we didn’+’t aim for a low price, but for high quality; a wolf in sheep’+’s clothing, a through bred race car among compacts. Physically small this speaker may be, its sound quality will surpass that of most much larger boxes.

Why you need the Micron.
Because you like to hear the very best sound, but don’+’t have the space for larger speakers. Because you are spoilt by your high quality stereo system, and can’+’t stand listening to untruthful sound in other living rooms / your workroom / the kitchen anymore. Because you don’+’t want to do without perfect music reproduction when, finally, you really have the time to sit down and listen, in your holiday home or apartment. Because you enjoy excellent sound from what is probably the most technologically advanced, most compact and least obtrusive way of filling a room with music.

技术说明

• Technical Specifications

• Sensitivity (2.83 V/1 m):

• 82 dB

• IEC Long Term Power Handling:

• >150 W

• Impedance:

• 4 Ohms

• Frequency Response:

• 45 Hz - 21 kHz

• Weight:

• 6,8 kg

• Dimensions (W x H x D):

• 170 x 283 x 305 mm

Sapphire

In the Dynaudio Sapphire, twelve distinct surface planes and twenty-four adjoining lines trace the unique design of the loudspeaker.

表面工艺

The mid-band frequencies are handled by a dedicated Dynaudio midrange driver which also incorporates Dynaudio’s proprietary MSP cone material and its dispersion-optimized geometry, thus reproducing every note perfectly clear and pure, and completely naturally.
To avoid any potential effects from the internal bass drivers’ back-waves, the midrange driver is firmly mounted to the baffle in an acoustically isolated, specially shaped low-resonance cabinet chamber.
Delicate high frequency sound waves require a stable and unyielding anti-resonant foundation to be reproduced tonally undistorted and in correct timing and phase.
Therefore, the low-resonance, extremely solid Sapphire cabinet, with its internal chamber for the midrange driver and tweeter, provides the ideal setting to integrate an advanced tweeter platform as the Esotar2.
All of the Sapphire’s exclusive, high performance drivers are connected and equalized via another Dynaudio speciality: A 1st order crossover comprised of carefully selected, tonally-balanced high-grade components.

技术说明

• Technical Specifications

• Sensitivity (2.83 V/1 m):

• 88 dB

• IEC Long Term Power Handling:

• 300 W

• Impedance:

• 4 Ohms

• Weight:

• 40 kg

• Dimensions (W x H x D):

• 330 x 1350 x 325 mm

Special One

The Project
Producing small loudspeakers with extraordinary performance is a Dynaudio tradition. As early as 1984, Dynaudio created two compact loudspeaker systems which attracted favourable attention because of the innovative technology and performance capabiljties offered. These systems became successful and contributed to the subsequent trend toward small, high quality speakers.

表面工艺

We have continued in this direction, and the Special One is the result of a research project directed at defining the possibilities of small system performance. We wished to know what could be achieved if drivers, crossover filters, and amplifiers are operated under ideal conditions. We had no limitations or commercial requirements, and every problem could be pursued to its solution.

As we became more involved with this investigation, we realized that the results were so interesting that we could not dismantle our prototypes and file away the research for future development, when state of the art reached finally the level of our projections. The decision was made to produce this audiodelicacy for only a few gourmets who could appreciate the experience.

Speaker Driver Selection

The driver units we decided upon were refined and improved until they exceeded anything we had ever done. When we were sure of their laboratory excellence, we began again matching the drivers to the cabinet requirements. Making our own drivers we are able to interface driver and cabinet instead of during in the crossover with countless components.

Woofers
For the low frequency range we have used a special version of the 17 W 75. This woofer has a balanced 1:2 ratio between the diameter of the piston and the diameter of the voice coil. In this case the large voice coil allows very high power handling, and, at higher frequencies, the outer surface of the diaphragm is decoupled acoustically from the inner surface, so the mass of the dispersing surface becomes smaller as the frequency rises. The result is weIl balanced dispersion and phase response that makes possible accurate stereo imaging. The controlled phase and amplitude response in the woofer’+’s upper range is a precondition for a seamless crossover to the high frequency driver. Every Facette is built according to the principle of non-parallel surfaces: the cabinet panels’+’ influence on sound is almost eliminated.

Tweeter
Recently Dynaudio introduced the Esotar 330 D high frequency transducer. This unit was the culimination of many years of development, and it has been used in state of the art systems from several manufacturers. This tweeter’+’s capability was taken into account when developing the Special One. Among the many qualities of special usefulness were the excellent pulse response. This is a result of the resonance damping of the swinging system through the use of a special magnetic fluid in the air gap. Ringing in the response is prevented without affecting the dynamic characteristics of the impulse. This system reduces distortion and phase error to very low levels. The most important aspect of the Tweeter drive unit is an ideally vented magnet system that prevents different pressure potentials among the areas of the chambered interior. The chambered rear system allows for a low resonance frequency and is ideally suited for the demanding but sonically superior 6 dB crossover rolloff. Every cabinet is created by a master craftsman; you`ll never find a production line on our premises.

Soft Dome
The support material of the dome is made of fine mesh fabric. Before use it is carefully impregnated with a special fluid to give the dome the necessary stability. After mounting the dome and the voice coil in the magnetic system, it is given an additional coating to provide balanced damping and to eliminate resoances. In the lower tweeter frequencies, sound dispersion comes from the entire surface of the dome. But as frequency rises, the top of the dome is decoupled mechanically, and sound dispersion is taken over by the outer areas of the dome surface. This means that moving mass and dispersing surface is reduced. Dispersion and pulse measurements on Dynaudio tweeters conclusively indicate this accurate response. In spite of a trend toward metal domes, Dynaudio has continued to develop the soft dome technology. We know that with metal domes, resonances inherent in the crystal structure of the material create resonances in the response that cannot be avoided. Such resonances are sometimes found above 20.000 Hertz. They are seldom indicated in response tests that are usually terminated before the point of rapidly rising output. These resonances should not be neglected, however. Manufacturers of CD players, for example, are eagerly trying to eliminate small pulse errors around 20 kHz and to filter interference signals at even higher frequencies. They believe that these errors affect the reproduction accuracy.

Crossover Filter
The Special One crossover is responsible for the distribution of the signals between the woofer and the tweeter. But it must also direct a whole series of modifications of the drive response combination. Large coil and premium polypropylene capacitors are required to carefully filter small rest ripples in the response. The reserves of these premium parts provide a sonic stability and tonal balance on any musical material.

Capacitors
For the last several years Dynaudio has been testing for the best film capacitors. We now think we have a special formulation that is clearly better than all other types. Even in those sections of the circuit which are not in the signal path, this capacitor shows a positive sonic influence. By using these capacitors we have improved the high frequency reproduction; the dynamic resolution is sharper, while tendencies toward "sharpness" in sound disappear. The Special One offers ideal conditions: perfect basic properties of the tweeters and perfect electrical response of the capacitors. This combination leads to the detailed reproduction in the tweeter range and stunningly realistic stereo imaging.

Impedance
Before developing the actual filter, the impedance response of the drivers was smoothed with the help of exactly calculated circuits. This not only influences the optimum functioning of the crossover, but it also enhances the cooperation between amplifier and loudspeaker. Even the tweeter’+’s impedance rise above 15 kHz is audible if the drive unit is precise enough to accurately reproduce these frequencies. Because we take so much care in creating a steady impedance response of the driver combination, the phase correction circuit can respond close to its theoretical potential.

First Order Filters
Dynaudio developments are based to a great extent on the application of 6 dB, or first order filters. Often in promotional literature, the impression is given that the use of filters with a high slope, 12 to 24 dB per octave, is a quality feature of loudspeaker systems. This approach has some validity when using drivers of standard construction and a narrow frequency range. Here crossovers with a high slope may help to maintain a smooth frequency response. But on the other hand, the higher the slope of the filter, the worse the pulse response of the drive unit. Since music consists of dynamic signals with many pulses and few pure sine waves, reproduction suffers from filters with a high slope. Therefore, Dynaudio uses only first order filters. Even if this requires highly optimized drive units that are difficult and expensive to manufacture, the musical result shows that it is worth our efforts.

Phase
By means of carefully directed structural parameters the phase response of Dynaudio drivers is optimized. The remaining difference around the overlap of woofer and tweeter are balanced by a very sensitive compensation circuit. This circuit uses only high quality components with narrow tolerances and very fast recovery. Long term stability is also a significant factor in the overall design of the compensation circuit. Until recently academic researchers as well as most system manufacturers have discounted the influence of phase on the sound of a loudspeaker system. But from the very beginning, Dynaudio has considered the phase response of a loudspeaker to be just as important as any other aspect, because it has been a known fact that stereo imaging and rear channel information in quadraphony are based to a large extent on differences in phase. A loudspeaker may have an accurate frequency response, but if its phase response is irregular, the consequence will be blurring, exaggerated musical sounds, or harsh tonalities.

Impedance Correction
Even if all of the aspects discussed above have been carefully observed, the impedance response will still have ripples which can only be controlled by an impedance compensation network. When properly constructed and employed, the impedance response between 100 Hz and 1.000.000 Hz is linear at 4 ohms. The connected amplifier is presented a nearly pure resistive load. The power amplifier can be operated under ideal conditions. Usually a loudspeaker is a difficult load for an amplifier, because complex signal portions generated by the capacitors and inductors require high circuit stability. But in the Dynaudio engineering approach, the loudspeaker system presents the ideal load for the amplifier and the sonic combination is always as good as the potential of the electronics.

Subjective And Objective Evaluation
Most audio enthusiasts have encountered components that share almost identical structure, design, and performance levels yet exhibit very different sonic properties. It is the fuel that fires the quest for audio excellence. This is a phenomenon that we have often confronted in crossover design. There are several paths that will yield a similar response measurement, but in listening tests the products will have a personal signature that seems out of proportion to the design differences. In the design of the Special One two different technical approaches were followed, and then each was refined for precise measurable fidelity to the original signal. At each step there were extensive listening tests. These tests were performed independently, but as they progressed the two designs began to resemble each other in ways the design team had not foreseen. For example, for the first time ever we used a new PC board layout that had no conductor paths. All components are connected directly or with large cable diameters. Inductance coupling of the coils on the copper coating was carefully avoided as well. This was an important experience because we recognized that many results cannot be generalized beyond the immediate experiment. Dynaudio products will continue to be designed experimentally; the designs will be ratified through patient critical listening.

Inductors
Well designed inductors with large wire diameters can often clearly improve the accuracy of response, During the design of the Speacial One systematic tests with different coil formulation were made. We were able to learn that "The thicker the wire, the better the results" was often not the case. We found that the Q (or quality) of the inductor influences the sonic results at high frequency range, is an important contributor to the fidelity of the system. Owing to this experience, Dynaudio developed coils which have several conductors with different diameters in parallel, an advancement we have named CWC coils. Application of these coils makes possible a precise bass reproduction with more dynamic range and less coloration. We believe CWC coils will play an important role in all new Dynaudio products, though they must be part of the original filter design and loudspeaker project in order for the improvement to be maximized.

The Result
The Special One sounds like no loudspeaker has in the past. It has no special musical material but allows you to enjoy all music to its fullest potential. It is unobtrusive but intense. For those audio enthusiasts who are looking to improve the chain of high fidelity reproduction, the Special One will certainly stand up to a detailed evaluation; for those who love music the Special One will be a joyful experience.

技术说明

• Technical Specifications

• Sensitivity (2.83 V/1 m):

• 82 dB

• IEC Long Term Power Handling:

• 150 W

• Impedance:

• 4 Ohms

• Weight:

• 9 kg

• Dimensions (W x H x D):

• 220 x 400 x 280 mm

Special Twenty-Five 

Twenty-five years of experience in research, development and production is now reflected in a unique loudspeaker - the Dynaudio Special Twenty-Five. 

表面工艺

Born from a synergy of technologies from the company’+’s most ambitious development projects, while remaining true to the Dynaudio history of craftsmanship, the Special Twenty-Five celebrates a quarter century of experience and values, a quarter century of Dynaudio tradition, innovation and fascination.

The Special Twenty-Five combines the Dynaudio tradition of finely-tuned compact loudspeakers with the company’+’s most advanced technical concepts as developed for its cost-no-object flagship models. The Esotar2 tweeter is based on that first developed for the new Confidence series, while the woofer is based on that developed for the Evidence Master

A testament to the extreme quality of the model was the twenty-five year warranty that was granted to the limited edition Burled Birch finish version of the Special Twenty-Five. Unlimited production will continue in all standard finishes with a standard five-year Dynaudio warranty attached.

技术说明

• Technical Specifications

• Sensitivity (2.83 V/1 m):

• 88 dB

• IEC Long Term Power Handling:

• >200 W

• Impedance:

• 4 Ohms

• Weight:

• 13 kg

• Dimensions (W x H x D):

• 222 x 423 x 349 mm