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Naim had got it right when it comes to 'letting the engineers do their thing' for what is clearly a highly engineering-led product: after an introduction from company boss Paul Stephenson and an overview of the streaming market as Naim sees it from marketing manager Alison Esposti, the R&D team took centre stage, each explaining their own contribution to the project. I managed to fit neither of those categories. But I think this is accurate.Brave, then, of Naim to go against the grain and let the engineers off the leash – well, almost – at the first showing of its new NDS high-end player, held at its Salisbury HQ on Monday.Ī smattering of journalists from around Europe were in attendance, with one or two notable by their absence – playing the 'I'll only come if you guarantee me an exclusive' card apparently cuts little ice with Naim – and we gathered in the company's boardroom after lunch in the works canteen for early arrivals, and factory tours for those paying their first visit to the company. > On Christoph’s (Silvercore) custom horns (he affectionately calls the Vulvas) he likes the relatively higher powered custom 2 tap SETs > On the WE Munich systems that he mainly loves, they are always with low power flea watt SET > On the Altec 817 based horn system by Mischo, for sure he likes the 3.5 watt SET amp sound. > On his favoured Horns Universum, I think it is fair to say he likes SET amps but has also enjoyed push pull. It must be acknowledged that the Dionisio is much less efficient than the aforementioned horns so perhaps there is something in that or simply that you can’t beat a bespoke custom system where the speaker engineer builds amps for that exact system > The Yamamura Dionisio back loaded horn that he loves so much (once in Italy but now elsewhere) had custom amps by Yamamura that are solid state current drive designs not SET. > Ked adores Leif’s horns using TADs with SETs. He was absolutely not in favour of that sound on the end of some higher power SET and solid state amps.
#Cogent field coil horn speakers drivers
> Ked has mainly enjoyed the AER drivers on the end of the really low power Mayer SET (the 1.25 watt 46 in particular). But this does not apply to pseudo-Beryllium diaphragms which may find their way into the dome tweeters of fairly inexpensive speakers (those diaphragms containing a very low percentage of Beryllium).Īl I think the answer is somewhere in between and my evidence is as follows:
![cogent field coil horn speakers cogent field coil horn speakers](https://www.6moons.com/industryfeatures/oswaldmill08/5.jpg)
The Radian compression drivers with Beryllium diaphragms that I have worked with have sounded very smooth to my ears, subject to the "voicing" of the crossover. Ringing is arguably not a significant issue with true Beryllium diaphragms, as it typically occurs above the range of human hearing. My guess is that they have addressed it, as imo that would be an area where improvement can be made over other very rigid diaphragms. That being said I don't know enough about the behavior of Alon Wolf's diaphragms to know whether they have successfully avoided the ringing issue which most rigid diaphragms have.
![cogent field coil horn speakers cogent field coil horn speakers](http://1.bp.blogspot.com/-8s7GnSAlP04/VHGKNzx3QOI/AAAAAAAAvDs/fsMM-AZFtgI/s1600/feastrex%2BD9eIII.jpg)
Thus in my opinion the requirements for the motor system itself may become more stringent if a rigid diaphragm is used.
#Cogent field coil horn speakers driver
Normally that ringing is suppressed by a steep crossover, but it can still be excited to an audible (and objectionable) level if the driver generates much in the way of harmonic distortion, as this distortion occurs AFTER the crossover so it is not suppressed by it. Stiff cones usually ring severely when they do go into breakup.
![cogent field coil horn speakers cogent field coil horn speakers](https://i.ebayimg.com/images/g/QW0AAOSwdQFdneLO/s-l640.jpg)
Intuition might tell us that we're better off with a cone sufficiently rigid to behave pistonically across the driver's passband, but what happens above the passband can still be an issue. Some manufacturers are working with innovative materials (or combinations of materials), and some are working with unorthodox computer-optimized geometries, to improve diaphragm behavior at lower cost than Beryllium.ĭown in the midrange and woofer region, there are tradeoffs between rigid cones and well-damped cones. True Beryllium diaphragms usually are.Īt the risk of over-simplifying, other compression driver diaphragm materials juggle stiffness vs damping. While there are definitely benefits to the relatively small excursions required of compression driver diaphragms, inherent pistonic behavior is not one of them.įew compression driver diaphragms that I am aware of are pistonic across their passbands.
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