The Supravox Field-Coil Chris Bryan gets back to basics with a simple full-range drive unit driven from an electromagnet. Review By Chris Bryant Supravox emerged from a company that was founded in France in the 1930s, and proved successful in the heyday of field-coil driver production. Since 1945 the company has successfully developed in house technologies and continued producing loudspeakers, almost uninterrupted, to the present day. Oct 2, 2014 - I'm running across a few speakers with field coil drivers. The Feastrex field-coil drivers are only about $50k, a pair of the Granadas. Only about $200k.:yikes. A friend of mine has a pair of full range Feastrix fieldcoil drivers.

Feastrex's original patent-pending Naturflux magnetic circuit is an immediately obvious innovation in magnetic circuit technology and represents an incredible value. Not only do Naturflux drivers achieve excellent gap flux density, that flux is extremely stable and able to be put to optimum use. The sound is amazingly natural and effortless: the music simply flows out as naturally and easily as a river meanders across the plains seeking the ocean. Asking magnetic flux to negotiate the sharp, 90-degree bends in a conventional magnetic circuit is like asking water to flow around a sharp right-angle curve. It can be done, but it’s not happy doing so, and inefficiencies result. Sharp bends affect magnetic flux and water pipes similarly: resistance increases with pressure and as a result flow volume falls off.

(In the case of water pipes, the right angle pipe will actually get hot under a high enough flow rate). Where previous designs fought against the natural behavior of magnetic flux, the Naturflux magnetic circuit accommodates flux behavior and uses it more effectively.

The Naturflux design demonstrate the importance of voice coil gap flux stability and strength in high fidelity sound reproduction. The NF5ex is a tremendous value, achieving excellent results with its round wire exciter coil and spherical S10 iron yoke. The bass from this circuit is incredibly powerful, with very natural dynamics and microtonal resolution. It takes the characteristic Naturflux sound and cranks it up to an even higher level of power and finesses, with impressive slam and authority, incidentally taking all the tonal charm and subtlety of the Naturflux aesthetic to a still higher level of perfection.

Megadeth - ddos tool download free software 2017. ＮＦ-5 Model ＮＦ-5 Spec AlNiCo magnet 5inch (12cm) fullrange driver Natureflux magnet circuit (s10c) Features Maximum input 25W（1KHｚ） Rated countinuous input 15W Sensitivity 94ｄB.