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- Bowers & Wilkins B&W 802D2 LF02385
- 916 zł z dostawą
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- Kolumny Bowers Wilkins 804 Nautilus B&W
- 10898 zł z dostawą
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- Okap Gorenje WHI643ORAW
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Bowers & Wilkins B&W 801 Nautilus (6448042490)
Opis
SPRZEDAM
Bowers & Wilkins B&W 801 Nautilus
Cena za pare , Kolumny technicznie i wizualnie w idealnym stanie od 1.wlascicela z niepalacego pomieszczenia , maskownice ,dokumenty w zestawie .
Z powodu wagi, wielkosci i ceny proponuje odbior osobisty u mnie , ale potrafie rowniez wyslac na palecie pancernie zabezpieczone , ale koszt takiej wysylki wychodzi dosyc drogo , moge rowniez przywiesc po otrzymaniu kosztu transportu zgory.
B&W 801 Nautilus / Cherrywood
Preventing mechanical vibration from the bass cabinet reaching the tweeter leads to a much cleaner, sweeter high frequency performance. For the 800 Series Diamond, we’ve adopted a synthetic gel to cushion the tweeter better than ever before. Not only that, we’ve also isolated the tweeter assembly from the tube and mounting behind, which reduces external interference to virtually nil.
Bowers & Wilkins’ FST™ mid-range drive unit maximises the effects of Kevlar® by improving cone response times and integrity of sound transmission. Surrounds both keep the cone in line and help to absorb bending waves. As the mid-range diaphragm only moves a little, Bowers & Wilkins has improved outer edge cone termination by means of “surroundless” suspension. A foamed material ring, with resistive mechanical impedance identical to that at the edge of the cone, is placed under the cone’s edge. Bending waves travelling up the cone are almost totally absorbed by the foam ring, which also compresses sufficiently to accommodate cone movement at mid frequencies.
All our careful refinements of the Kevlar cone would count for nothing if we didn’t do all we can to minimise other sources of disturbance. Moving air behind the cone, for example. The chassis of the FST driver is designed to minimise any impedance to the flow of air from the rear of the driver. To reduce the clutter immediately behind the cone still further, we’ve adopted neodymium magnets, which deliver the same magnetic force from a smaller device. The FST driver is a refinement in the use of Kevlar cones and you should first read the section Kevlar cones before going on. Laser Interferometry gives us detailed information about how various diaphragms operate and a much clearer insight into ways of improving their design.
With cone diaphragms, the outer surround can be a major cause of problems. Its primary purpose is to maintain an air seal and help keep the voice coil aligned in the narrow magnetic gap as the cone moves back and forth. It must be flexible enough to cope with the maximum required movement of the cone. However, this very flexibility is the reason why the surround doesn't always follow the movement of the cone in a coherent manner. Problems start to occur at the so-called surround dip frequency, where the surround begins to move in the opposite direction to the cone and partially cancels its output. There are various design tricks that enable you to smooth out this effect to some extent, but it would be nice to avoid it altogether.
There have been driver designs in the past that have done away with the surround altogether – free edge designs had some popularity in the 1950s and 1960s. However, there are a couple of drawbacks with this approach. Firstly, there is no air seal with the cabinet and the driver effectively reflexes itself with a poorly designed port. Secondly, the unterminated edge of the cone allows more severe cone break-up. Bowers & Wilkins engineers therefore did a bit of lateral thinking, based on the realisation that if you restrict yourself to mid frequencies, where the required cone movement is small, you can design a different type of suspension.
Instead of a normal rolling surround, the Fixed Suspension Transducer (FST) uses a narrow ring of foamed polymer to support the outer edge of the cone. The small movements of the cone lightly compress and stretch the ring. Because the ring's surface area is small, it radiates relatively little sound, and what little movement it does have always follows the cone edge because it is so tightly coupled. But you can go a stage further. By choosing the mechanical properties of the ring to match those of the edge of the cone, more of that bending wave energy travelling up the cone (see the section Kevlar cones) passes through to the surround. And if those properties are resistive or lossy, the energy can be converted harmlessly into heat. The result is that far less energy is reflected back into the cone than with a similar driver with a normal surround.
Compared to a regularly terminated Kevlar driver we can note two things about the FST surround. Firstly, the whole cone begins to respond much quicker in a given time. In the time domain this equates to a better transient response. In the frequency domain it indicates a more extended high-frequency response, and indeed the response of this driver is smoother to higher frequencies and allows a better-integrated crossover to the tweeter. Secondly, the final pattern of cone movement is even more random than for the regular driver, with a resultant increase in clarity for the listener. Additional features of this driver, not connected with Kevlar are the copper sheath on the magnet centre pole, a device for decreasing harmonic distortion, and the skeletal chassis (basket) design, which minimises reflections from the chassis and optimises the coupling between the driver and its enclosure.
For speed, stiffness and unshakable bass, this cone material, normally used for aircraft, rockets and performance cars bodies, is the bottom line. We found Rohacell® being used extensively in the high performance automotive and aerospace industries, where its unusual combination of very low weight and very high resistance to bending stress make it the ideal choice for a multitude of applications. Those very same characteristics also make it an ideal material for the structural heart of a bass driver.
We carry out exhaustive listening tests rigorously assessing the performance of each component until we find the optimum component for each position in the circuit. Fine-tuning by ear is only possible if the crossover is simple and the section of the crossover that perhaps benefits most from our policy of listen-and-learn is the part handling the signal for the tweeter. In most Bowers & Wilkins speakers, it is carried by a single, ear-chosen component that preserves the very finest detail.
Bowers & Wilkins’s Flowport™ minimises turbulence in the same way as a golf ball. Dimples on the surface generate tiny eddy currents over which air can flow smoothly, reducing turbulence, and improving performance. This is because if turbulence occurs as the air moves in and out of the port, you’ll hear extraneous noise and, as you turn the volume up, the bass won’t be as tight and well timed as it should be.
Unique to Bowers & Wilkins, Matrix™ interlocking panels take cabinet bracing to the ultimate level. With powerful bass drivers trying to shake the cabinet and high air pressures inside trying to make the panels flex and blur the sound, this three-dimensional honeycomb structure reinforces the cabinet at small intervals and in every direction. Offering a dramatic cut in the level of cabinet coloration, Matrix allows you to focus on where the performers are, rather than being aware of where the speakers are.
MIESZKAM W CZECHACH 12 KM OD GRANICY CIESZYN , JESTEM W POLSCE 3 -5 RAZY TYGODNIOWO , NIEMAM PROBLEM WYSLAC Z POLSKIEJ POCZTY ALBO POLSKIM KURIEREM , CZY DOWIESC DO KLIENTA ZA KOSZT PALIWA , OCZYWISCIE PO WPLACENIU KOSZTU TAKIEJ WYCIECZKI NA MOJE KONTO .
POSIADAM KONTO W POLSKIM BANKU I Z PRZELEWEM NIEMA PROBLEM , MOZNA TEZ PLACIC SERWISEM ALLEGRO .
ZA POBRANIEM WYSYLAM TYLKO PO ZAPLACENIU KOSZTU WYSYLKI !!!!!!!!!!!!
ZA POBRANIEM WYSYLAM TYLKO PO ZAPLACENIU KOSZTU WYSYLKI !!!!!!!!!!!! ZA POBRANIEM WYSYLAM TYLKO PO ZAPLACENIU KOSZTU WYSYLKI !!!!!!!!!!!! ZA POBRANIEM WYSYLAM TYLKO PO ZAPLACENIU KOSZTU WYSYLKI !!!!!!!!!!!!
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