It does not swallow energy like raw MDF. The four-inch Fostex FEEZ is an amazing driver. Not as directive as the bigger siblings, it has marvelous midrange . : Fostex FEEZ ‘Sigma’ – 4″ full range driver with paper cone and ferrite magnet. Fostex FEEZ Sigma Diametermm. Fibre Cone Full Range Features include a unique Hyperbolic Paraboloid shell diaphragm, UDR taniential edge.

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The Revelator has a voice coil inductance of 0. Fe108ezz have been working on this for many years and I see no reason to give it away, especially that the loading needs some technical understanding to be implemented properly.

A creased piece of paper is more rigid than a straight piece of paper. At this time we have three models using similar loading: When I got older, I became hooked on harmonics, especially large pianos and room harmonics.

The design of the cone and dustcap is called hyperbolic paraboloid. It behaves like a horn and a transmission line. But ring removal had to be compensated for with a beefier baffle board. Also a Ferrari is a Fiat with a fancy engine.

King for responding the questions. No enclosure to speak of, just a set of panels and curves giving an absolute kick. There was a lot of dicussions and incredulity a few years ago and this is OK. Sound is the core of Gemme. So for the same foatex, it can be made with thinner material. There’s a lot of tweaking that will be done to extract the maximum transparency that the driver can achieve and I anxiously await your review for further tweaking suggestions.

It’s very time consuming but it won’t crack after a couple of years like automotive finishes will on wood. Especially pics of the inside or drawings is welcome here.

Concerti v3 might or might not feature slot openings on the mouth’s sides to equalize the high mouth pressure with the low room pressure, designed after gun silencers. I’m not a cabinet maker. The driver is mounted on a birch plywood plate finished with a compound called Effecta Gomma a form of rubber coating.


It was a difficult birth. To me, the scoop was the most beautiful enclosure ever. Later on, I destroyed and reconstructed my mom’s Telefunken table radio, then my father’s cherished Grundig console. Occasionally — as in the case of Robert or Green Mountain Audio’s Roy Johnson — someone has truly poured their heart and soul into their product and it seems only fitting to share this whenever possible.

Why the shape and patterns on the cone, dust cap and surrounds? You just might forget fussing over traditional audiophile minutiae and instead re-explore your existing record collection and perhaps even expand into other music genres. My speaker design career started in a destructive way. The air trapped inside the compression chamber is – well, highly compressed.

Regarding the piano finish, it’s very important to understand that we do not use automotive finishes i. We are also working on advanced composite construction using MDF, steel panels and leather. Inside wiring can be customized in any alloy or alloy combinations. The dostex Concerti design evolved since the time you had your review pair and it will continue to evolve.

I’m a piano freak and in acoustic music, bass is only part of the equation. We did not publish the plans of the enclosure. Page 1 of 3. Speaking of contradictions, the same reverse psychology took place when Fosttex designed the Basso the bass cabinet companion of the Concerti.

Fostex FEEZ ‘Sigma’ – € : , Loudspeaker shop

This in turn means less copper on the voice coil, hence a smaller inductance value a high value inductance makes the coil acts as a low pass filter. I listened casually over a couple of hours and then suddenly, somehow, those aforementioned colorations didn’t offend as much. Exabot [Bot]Google [Bot] and 5 guests. A lighter cone also makes possible the use of a smaller voice coil.

  DS2480B PDF

Just to give some proportions to this, figure a 10″ driver in an 8″ cube. Wed Jun 10, 3: After those first projects, it was made clear that if I wanted to experiment more, it would be with my own allowance money. There was no way we could drop the price without changing the basic design of a perfectly smooth horn path. I sold him the horn because I did not like the sound anyway it was based on a Fostex FEEZ, a nice driver but too directive and “hard” for my tastes. Jekyll thing to horns and resonant enclosures.

All Gemme Audio clients are unique. I’m just wondering about the significance of that.

Fostex FE108EZ 4″ Full Range Sigma Series

I remember the first time I heard a horn loudspeaker. In pure horn fashion, the enclosure would need to be 10 times as big. So the corporate focus is working with clients once they’ve decided that the sound we offer suits them – to get exactly the right product variations.

Horns are resonant enclosures. This review confirms that bass response does not get down that far and paints a pretty ugly picture of the response between Hz.

Overall I feel that this change was for the better fodtex we can now offer full veneer as a cost-effective albeit cosmetic option.

Also, we are still working on the resonant aspect of the enclosure. I guess it’s like concentrated orange juice versus fosyex squeezed orange juice. Naturally, the design evolved over time, and I am working on the 3rd generation.