Are my " diamond " tweeters really diamond

@soundsrealaudio they’re not real diamonds. diamond tweeters are made of synthetic diamonds that are vaporized on a silicon mould. it’s a vapour depositing process. after the diamond cone is properly hardened, the silicon mould is melted with heat. those are very thin cones and it would be impossible to cut real diamonds like that. as has been previously mentioned, the breakup frequency is pretty high (hence the lower distortions), but a diamond cone has more mass than beryllium and needs a stronger suspension. it means that it probably needs more power and wont’t play lower frequencies as easily as beryllium does.

@helomech 

I fully agree with you but I see where this is going... Well, there are many non-diamond speakers out there as expensive (or more expensive) than their diamond competitors. Manufacturers are always looking for improvements and pushing each other. Call
it hype if you will, but my ears never heard as good speakers as we have nowadays (diamond or not) and the best ones are unfortunately big, heavy and quite expensive, regardless of the material used for their drivers. Such is life...