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RE: EMS LB12EX field coil full range driver by Catherine Fertin

Posted by adriatika (A) on August 30, 2009 at 11:06:43

In Reply to: RE: EMS LB12EX field coil full range driver by Catherine Fertin posted by ThomasG on August 30, 2009 at 02:19:13:

Hello Thomas,

Thanks for your interest in our product. My english is a bit bad, but I hope you'll understand me well. Sorry if words are not so clear as they could.

LB12EX (and LB12, in a minor note as well) presents some advantage compared to alnico or other well designed LB. Firstly, it's very linear, without any usual accident in the critical area of 1500-11000 Hz. Another point is the ability to greatly enhance the result using well conceived stabilized power, or even battery. In the other hand, the level of performance is constant in times, compared to alnico.

We have developed a technology with no standard values applied to magnetic fields. In fact, the absolute values are equally displayed into the entire mobil elements and match only as a global one. If you measure at a particular point, you will not find the value which is considered by industry as the optimal one. We discovered that this kind of measure is not suitable with a stable performance, as the theorical ideal value changes according to the movements of the mobil elements, causing very short moments when the membrane is not well driven, due to the coil moving out of the optimal magnetic fluid. With our technology, the coil is ever moving in optimal conditions, not matter its position (in normal conditions, of course, our drivers are not sono pa systems).
We have test a lot of drivers from other brands, and none uses our technology. Fortunately (for us), the great brands are buzy to develop new materials, new up to date look to suit marketing demand. Then, we have a slightly technological advance which make the difference. Maybe another developer : Janus by François Deminiere, is working in a similar way... I don't meet him yet, then I'm not sure : http://fdacoustic.fr/JANUS50_ecoute.htm

the technical datas are here : http://www.emspeaker.com/LB12EX_fiche_technique.pdf

Well, I know about Tannoy dual Concentric drivers (all). EMS LB12EX delivers a slightly more stable 3D image, more dynamic live sound and (by consequence ?) a very much more analityc power.
Thanks to their good tweeter, Tannoy's are a bit softer and match well with amps of the highest level. Curiously, I've heard enhancement with dynamic amps like Creeks ones or Lavardin, probably because of their high dynamic in the mid low range. A characteristic which can be favored by high end 300B amps.
But if you want to immediately hear the difference between a Bösendorfer and a Yamaha, then you will have to choice the LB12.

Vantage Altec Duplex 605B are old school drivers at their finest, in my opinion. Coupled with an amp like yours, it's a very interesting marriage. Well, LB12EX is another completely different solution. I have no idea what could be the result with a horn Fostex T825A, but talking about measures, it could be a very suitable association (chord and efficiency).

I can ask to Katy Fertin if you need more accurate informations.

This post is made possible by the generous support of people like you and our sponsors:

Kimber Kable

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