
AcuDefTechGuy
Audioholic Jedi
I think many of us have seen accurate speaker measurements from almost all types of driver materials (soft dome, Beryllium, Titanium, Aluminum, Magnesium), except for Diamond.If you look at my measurements of the 800 D3, you can see that peak slightly in the on axis measurement and in the waterfall plot slightly. However if you look at the off axis response it disappears. So the in room response is likely good. However the waterfall plot gives the suggestion that things are not quite right at 10 KHz.
I'm not convinced diamond is the best material for a tweeter diaphragm. The SEAS diamond tweeter is not that good either come to that by measrement. The fabric dome SEAS excel tweeters I use in my mains measure better.
So I am seriously concerned this drive to diamond is driven by the marketing department more than anything else. Rigid versus flexible cones has merits they go both ways. I have never been convinced that all truth lies in the rigid camp, but my be I'm in the minority on that, but may be not. To me a really good soft dome tweeter sounds much more natural than any hard dome. Although I had some Titanium dome tweeters in the living room speakers in Grand Forks that went with house. I liked them very much.
So I agree that synthetic diamond is more of a marketing scheme - people think “exotic diamond” even if it’s synthetic and not real diamond.
I mean synthetic diamond is not the worst, but just not as accurate as all the other materials.