A wonderful tweeter that is very expensive to build, but has everything you need for perfect high-frequency reproduction. Smooth and yet gripping on impulses, airy and transparent in sound with a wide dispersion cone for even excitation of the listening room.
As an alternative to beryllium and diamond, aluminum tweeters impress with their gentle timbre and hard attacks. However, they are significantly cheaper and easier to manufacture than beryllium or diamond. You are welcome to check with your specialist dealer that they still sound outstanding. Stunningly good!
Soft-Dome tweeters are so popular because they are made as a membrane and a bead at the same time. The silk material is simply folded and folded, forming not only a membrane but also the edge suspension (bead). Of course, this leads to an uneven suspension and produces unnecessary distortion. Our Soft-Dome is manufactured in the same way as all our other tweeters: the Soft-Dome is cut off and an external beading is glued on, which is glued onto the edge of the voice coil without wrinkles. This allows it to vibrate perfectly linearly, which drastically reduces distortion. An excellent choice!
Diamond, the diaphragm material for the ultimate in transient response! This is clear from a glance at the physical properties. What was long considered utopian is now true: there are tweeter and midrange membranes made of flawless, artificially grown diamond. For almost 20 years, we have been installing tweeters and mid-range speakers with diamond membranes, and our sound experience has confirmed everything we had hoped for. The ultimate resolution, perfect drawing, hard attack and cleanliness combined with extremely low distortion help these chassis to achieve the absolute top position! Unbeatable and worth every extra!
The secret of a good tweeter is not just the material, but the overall design. Here, too, our tweeters set new standards. Thanks to an innovative gluing process, the voice coil is not deformed when the copper wire is wound and remains perfectly round. This is why the air gap in the magnet system can be reduced to the extremely small width of 0.9 mm (normally the values here are 1.4 mm – 1.8 mm), so that the magnetic force in the air gap is much higher than in all previous tweeters. We now achieve a magnetic flux density of 1.8 Tesla compared to 1.2 Tesla to 1.4 Tesla for conventional tweeters. According to Newton's law of mechanics, the magnetic force is stronger by exactly this ratio, so that the tweeters are accelerated even more and achieve even higher resolution. The roundness of the voice coil also leads to a greatly reduced distortion, which of course leads to an unpleasantly sharp sound. These new tweeters sound correspondingly smooth and pleasant.
Based on this manufacturing method, we offer four different tweeters that differ only in the choice of material for the dome: resin-coated silk (soft dome), aluminum, beryllium and diamond. A tweeter doesn't really have a sound of its own either, but rather certain physical properties that describe its acceleration behavior, and it is precisely these that account for the differences in sound. If the membrane cannot follow the acceleration (hardness and rigidity) or if it is too heavy (note: the mass of the dome is determined not only by the dome material but also by the mass of the voice coil), then the dome cannot follow the accelerations, bends and produces distortion. Materials that are too soft and have too little rigidity (low modulus of elasticity) will undergo partial vibrations and deviate from piston behavior. Then parts of the membrane vibrate in antiphase to each other and cancel each other out. On the other hand, soft materials are preferred for suppressing material resonance: they vibrate far less long.
Some materials have a dome resonance at higher frequencies (typically between 14,000 Hz and 30,000 Hz). Since these resonances are outside the audible range, they are not noticeable in the first order, but they store energy in the membrane and thus modulate lower, audible frequencies.
The behaviour that ultimately determines the sound quality depends on many different properties of the tweeter as a whole and on the material properties. We take both into account and equip our speaker series accordingly:
Arcona: Soft Dome
Capello: Aluminum, Beryllium (optional at extra charge)
Elargo: Beryllium, Diamond (optional at extra charge)
Berlina: Aluminum; Beryllium, Diamond (optional at extra charge)
DARC: Beryllium, Diamond (optional at extra charge)
For our four-way loudspeaker systems, we have combined the three ranges of midrange, mid-high and high-frequency into a single unit. All three chassis (ceramic midrange, diamond midrange tweeter and diamond tweeter) are specially mounted on a common aluminum flange so that the geometry remains the same for all speakers and the crossover also becomes an integral part of this unit, although it is still specially adapted to each speaker box. The individual chassis housings, which we manufacture using a 3D printing process, are also an integral part of each unit, so that they always have defined volumes, because the rear volume of each loudspeaker is part of the overall calculation of the transfer function. This describes the behaviour of the entire loudspeaker in the time and frequency domain and makes it possible to make accurate predictions about the sound and acoustic properties of the system.
The above also applies to the MHT unit of the DARC 750, except that a 90 mm diamond membrane is used instead of the 50 mm diamond midrange driver. This can therefore be used from 600 Hz, so that the dispersion is absolutely perfect, and there is no longer any unwanted bundling. The impulse response is also improved and the crossover can be designed even more elaborately. All this leads to a completely light and detached sounding music reproduction, which shows no compression and fills the room. A new milestone in hi-fi and music reproduction!
A 17 cm ceramic midrange driver plays from 143 Hz and hands over at 1200 Hz to the 50 mm diamond midrange driver, which is replaced from 400 Hz by the 20 mm diamond. This unit avoids the beaming of the 17 cm ceramic midrange driver and thus has an almost perfect dispersion (omnidirectional sound radiation), which results in incredible transparency and spaciousness of the music. In addition, the transient response is even better than with our three-way speakers, since the moving mass of the diamond membrane is significantly lower than that of the 17 cm midrange membrane.
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