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In the Forum: Audio For Dummies ™
In the Thread: UHF capable tweeters and the moronic conclusions
Post Subject: Ok.Posted by Romy the Cat on: 9/15/2012
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Haralanov,

Yes and no. Of cause no one would deny the benefits of ULF reproduction but the key questions would be: 1) what kind of reproduction? 2) how to talk about it?

There is no language to convey the ULF message. The 20K repose is meaningless and it is not -3dB as any other frequencies but in the best case minus 12dB, with great fluctuation from sirloin specific local conditions. Then there is “what kind” of ULF. I do feel that if a playback can’t furnish a good quality of 20K and above then it is much better do not make an attempt to go for 20K.  With proper quality of let say 12.5K a playback might be very musical and perfectly usable. Would it make sense to get 2-3 octaves above? Sure but if the playback can handle it. This is very much as in case with ULF: of you can’t do 20Hz properly than stop at 40Hz and do not go to the dangers LF territory that will compromise your midbass and lover MF.
The phase response of course it critical but I do feel that it is mostly the subject of electronics. With acoustic systems in real rooms we have very ruined phase response at 20Hz. Trey to reconstruct any more or less reasonable pulse from a tweeter at the microphone installed at the listening position. It is very very questionable.

Yes, a twitter that starts from 2K as most of the dome metal tweeters are is very problematic but I have to admit that they are a bit “no” from conceptual perspective but they are well listenable in real world. A tweeter starting at 10K is very different topology of the whole acoustic system and I would even propose that this type of the tweeter can’t not be used by the people who do not know what they do (95% of folks in audio).

I personally feel that the above  10K tweeter have to be sold as an assembly along with MF drivers, I do not see anybody market such tandems.

The Cat

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