Super Tweeters - Fact or Flights of Fancy?

[Welder]

Nope, I’m quite prepared to accept there are harmonics that are not directly audible to the majority of humans. I’ve seen them on a scope when playing my Sax


Still not convinced that a decent “ordinary” tweeter won’t reproduce these harmonics up to say 30kHz and I’m extremely skeptical of any sort of human perception beyond this
Anyway, I certainly wont be forking out £300 to £400 to find out if anything above 30kHz makes my brain go, Ahhhh, bat music.


Edit. I cant help wondering if these harmonics are perceptible then why aren't we all running around clutching our heads because the natural world produces them in abundance never mind all the electronically generated high frequencies that we've surrounded ourselves with.

[Reid Malenfant]

Most tweeters will be in serious breakup mode from about 20KHz upwards..

Soft domes will start at about 13KHz, but it's fairly innocuous as they are soft & it is damped. Aluminium will start complaining in a nasty way at about 16KHz, Titanium approximately 19KHz...

But Beryllium is way out there at 27KHz 2425_animado.gif

[goraman]

Most tweeters will be in serious breakup mode from about 20KHz upwards..

Soft domes will start at about 13KHz, but it's fairly innocuous as they are soft & it is damped. Aluminium will start complaining in a nasty way at about 16KHz, Titanium approximately 19KHz...

But Beryllium is way out there at 27KHz 2425_animado.gif

This post is very educational,Is this why people love the old Yamaha's with the Beryllium tweeters?
I am often shocked at the price of these old Japanese speakers.

Look at number 2 ,Yamaha NS 1000 http://forums.audioreview.com/speake...ears-1885.html

[Reid Malenfant]

Probably Jeff The midrange is Beryllium as well by the way

If you'd have seen my face the first time I got to listen to a pair I think you'd understand, my jaw would have hit the floor if I was close enough

You need the right type of amp to drive them though, give them the wrong one & they sound bloody awful. They simply show up how bad the amp is

[Welder]

Hmm, I think it rather depends on the quality of the tweeter
However, I agree that soft domes break up more nicely than metal
Anyway, dancing time, or in my case this is prolly more like it with a bit of thisand maybe if i dont trip over much some of this

[goraman]

What do you guys think about these tweeters.
They are in my speakers.
http://www.madisoundspeakerstore.com...-dome-tweeter/
http://www.madisound.com/store/manuals/TW025A28.pdf

Do they spec well?

[Welder]

I’ve deleted this comment because I can see some very silly arguments ensuing.

[bobbasrah]

I would argue that despite all scientific evidence to prove we cannot, there are aspects of science which have not yet nailed down what we perceive. I also always thought a super tweeter was something like Stephen Fry. Go figure....

[goraman]

A human super tweeter (Meet Fred)

http://www.youtube.com/watch?v=0EiM8Pa91SQ

[Reid Malenfant]

What do you guys think about these tweeters.
They are in my speakers.
http://www.madisoundspeakerstore.com...-dome-tweeter/
http://www.madisound.com/store/manuals/TW025A28.pdf

Do they spec well?

Audax make some rather good drive units & I'd say that those look pretty damn good to me I'm not sure about the gold plating as it looks a tad bling, though there may well be some sound () reasoning behind applying it. Like lead, gold is a very soft metal & will tend to damp the titanium diaphram. Lead oxidizes & it's not particularly good for you, where as gold doesn't oxidize & looks a lot prettier

Must be a really thin layer of the stuff or the tweeter could never be as sensitive as it appears to be. 104Db @ 0.5m is equivalent to 98Db @ 1m

Distortion looks to be very low to.. Nice I just hope a mild contour network was stuffed on the tweeter to lower the output a tad between 8 - 16KHz to bring the whole thing flat. Not too difficult at the end of the day..

I would argue that despite all scientific evidence to prove we cannot, there are aspects of science which have not yet nailed down what we perceive. I also always thought a super tweeter was something like Stephen Fry. Go figure....

Science never really proves anything, it's just there to debunk bad theories