They aren't coatings - they're just made of the stuff.
For hard tweeters, the following things matter a lot:
- Speed of sound through the material (i.e. how fast the sound travels across the dome from edge to center; the higher the better)
- Stiffness to weight ratio (higher the better; an ideal speaker diaphragm has infinite stiffness and zero weight)
Beryllium has a very high stiffness to weight ratio (it's extremely low density for a metal) and its internal speed of sound is high as well. The first breakup mode in a 1"-ish Be tweeter is very high (an octave or so above the top of human hearing).
Diamond, on the other hand, has a density about twice that of Be (1.8g/cm3 vs 3.5g/cm3) and only about a 20% higher internal speed-of-sound (13,000 m/s vs 16,200 m/s), but it's very very stiff.
But... It doesn't really matter what the tweeter is made of. What matters is how it's implemented. An aluminum dome in a good design performs better than a beryllium (inverted) dome or a diamond dome in a bad design.
This is down pretty much entirely to frequency response. Distortion plays a role here too, somewhat.
Nope! Frequency response is far and away the most important factor.Thanks ...this is very educational.
And it makes sense , as I observe that new generation tweeter sounds more life like (realism) in reproducing the sounds of cymbals, bells, breaking glass (in movie tracks).
It seems frequency response is not the main factor for sound quality (since there is bass/treble adjustment and some speaker crossover knobs to tailor the upper frequency response).....how it produces the sound with the good material property on bass/mid/tweeter are more important, right?
Nope! Frequency response is far and away the most important factor.
Sure can. Definitely experienced this before.Agreed, but midrange and tweeter distortion can be an audible factor too. I remember some kevlar midranges had distortion problems, and some tweeters (obviously not the 800/802D tweeters or the Salon2 tweeter) are known to have limited headroom, especially in the lower end of their recommended bandpass.
3) Mebbe. Aside from the cannons, not a great recording. (Which recording btw?)
The curve for the Shure mics looks terrible.
Sounds like anti-Harmon biasIf you like the sound of B&W's house curve, more power to you. Home audio is at the end really all preference- you're not aiming for something that can be used as a studio monitor (though, I do know of a few mastering guys who use B&Ws).
There is a massive Harman bias in this forum, that's for sure. But that said, I can't say I've ever heard any Harman family speaker that I've particularly liked.
Also the on axis increase is more than compensated by the increased directivity at that region and usual high "highend" listening distances as it can be seen from the horizontal 30° measurementThe 3 kHz peak will emphasize upper vocal overtones. A lot of vocal mics have a similar "presence peak" (marketed as such) to help vocals "cut through" the mix. A lot of people like it, and it works on some material, just not all IME/IMO. The rising response to 10 kHz will emphasize the higher transients and such but we are less sensitive to those frequencies. Note the 3 kHz peak is about 3 dB; I would consider it "noticeable" but it is not a huge bump up. The combination can emphasis upper frequencies and explain why some folk might use words like "faster" or "greater presence" and such when describing the sound.
I had B&W 804 Nautilus for a while. I generally liked their sound but the thing that bothered me was that the soundstage was messed up if i listened to them toed in. All the cymbals, hihats, HF stuff was fixed on speakers. When I toed them out almost facing the rear wall, only then the soundstage got right, instruments were between speakers. But then they sounded darker and always felt something was missing.I wonder if people who claim the 800-series B&W's are overly bright are listening with them completely toed in and aimed directly at the listener (I.e. What Revel, Genelec, and Kef tells you to do).
Also people here have a tendency to freak out when they see the treble emphasis from the stereophile FR graph, perhaps not realizing that it represents a narrow on-axis window. The HF response of these B&W's can be easily adjusted by varying the amount of toe-in.
Could be. Was an impressive demo but, of course, there were two Telarc 1812s.I'm sure he's talking about the now famous Telarc recording originally released on vinyl.
Could be. Was an impressive demo but, of course, there were two Telarc 1812s.
Thanks, Kal. One recording of the 1812 Overture is enough for me.
I have that SACD (first on the above pic) version.Yup.
I wonder if they used compression to fit all of the dynamic range of this recording onto vinyl.
Also I just figured everyone skipped ahead to the cannons to test their subwoofer.