Just wanted to interject: there is a huge amount of variation in beryllium drivers offered on the market right now, and it's not immediately apparent to most people. Just about all of them are produced via a thin-film coating technique called physical vapor deposition (PVD), but these coatings are not made equal. Even though beryllium itself is supposed to be one of the most "colorless" acoustic driver materials around, the fact remains that the beryllium used in earphones these days is PVD-coated onto a polymer base material such as PET. So a few microns of difference here and there confer very distinct differences in sound. That's why there are sub-$100 products that tout beryllium drivers, and $1000+ products with beryllium as well.

While it wouldn't be appropriate to comment on products from other manufacturers, if we take our own products as an example, we offer beryllium-coated drivers on five different models, ranging from $139 to $899. That's a pretty big range of prices. Our DK-4001, the 17th Anniversary Limited Edition model, DK-3001 PRO, and (not yet released) DK-2001 all have 13mm drivers with dual-sided PVD coatings, but they sound quite different because the coating thicknesses are different, the microscopic grain structure is different, and the base polymer material is different. So we can tailor the response of the driver to be ultra fast and clean in the transients, thick and bold sounding, or gentle and resolving.

DarkZunicorn a écrit :Ah, je comprends mieux ce que tu voulais dire par "ambitieux"... lool:
OK. Pas pour moi, alors.
Merci pour ta réponse rapide.