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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Horns are resonant enclosures. For instance, if we compare the moving mass including air of the FEEZ vs. Also a Ferrari is fw108ez Fiat with a fancy engine. Jean-Pierre then takes over and tests everything on all kinds of equipment chip amps, solid state, tubes of all varieties, different CD players, etc. The product core is where we want it to be but the details are still being worked on.

The ‘s voice coil tostex 20mm while the Revelator’s is 38mm. I listened casually over a couple of hours and then suddenly, somehow, those aforementioned colorations didn’t offend as much. The air trapped inside the compression chamber is – well, highly compressed.

Have you heard the Gemme Vivace speaker?

DIY Audio Projects Forum

My first love was a JBL scoop. Those speakers sounded – well, horny if you catch my drift. The driver is mounted on a birch plywood plate finished with a compound called Effecta Gomma a form of rubber coating.


This means that the lighter cone has less inertia so it should be “faster” or easier to move.

It turns out that horn- loaded speakers, while hardly perfect, offer a totally different yet completely valid listening experience that may startle those raised on conventional dynamic speakers. A few years ago I spent some time running simulations of the design based on my reverse engineering of it from info I found on the Internet. I do not want to imply that the Concerti will reach 42Hz flat but there is some output at that frequency, enough to give a credible image of the double bass.

If someone requests a water buffalo wrapped enclosure as someone did ask forwe get our maroquinnier on the assignment. Music became curiously more real and visceral.

6moons audio reviews: Gemme Audio Concerti

The whole enclosure sits on machined leveling feet. A creased piece of paper is more rigid than a straight piece of paper.

But no matter what you think about the “first horn” or Vivace speaker designs, I think everybidy would agree that the worksmanship and finish of the enclosures was very good. Thanx to Gio and Mr. We are constantly fiddling with the design of the Concerti. I carried out my first speaker project at the age of 8 by destroying a portable AM radio I got for Christmas.

There was some discussion of the Gemme speakers on the Internet forums a few years ago in which claims made by the manufacturer were met with some skepticism. But I also discovered that full-range sound meant absolute integrity of harmonics. The design of the cone and dustcap is called hyperbolic paraboloid.


Hi Gio, I started by modeling the “first horn” design. Using a critically damped design meaning a box with a larger volume of air than what would be required for a max-flat alignment gave us just enough volume to fit the driver and amplifier in a one cubic foot box and still get in-room extension to 15Hz with no boominess, just ultra fast transients.

DIY Audio Projects Forum • Fostex FEEZ Gemme Audio Vivace Speakers

The paper material actually banana pulp is so thin that it’s translucent. The brass ring is a factory option. Instead of this, we use a low Q driver below 0.

Furthermore, I could hear a cupped-hands sort-of-boxy coloration. Fortunately, it was designed for such use low mass and low inductance equal rising frequency response and no bass.

King for responding the questions. I also noted that my driver is mounted on a suspended plate whereas others seem to be mounted directly to the front baffle. He tries to get a hold of the best possible way to integrate our products in the audio chain.