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In the Forum: Audio For Dummies ™
In the Thread: UHF capable tweeters and the moronic conclusions

Post Subject: The long story in shortPosted by haralanov on: 9/15/2012

Yes, Paul, you are right that it has to be pointed that the frequency extension, by itself, does not guarantee anything (but that’s why I posted the thread in Audio For Dummies section :-) ). OK, now let’s see how the tweeters should be used (in context of more or less serious installations). The working range of a real HF driver should be over 8-10kHz. It is real stupidity for somebody to use his HF driver, having a size of a fingerprint, as low as 1,5-2kHz. All those 25-30mm domes run out of energy well above 5-6-7kHz, despite they produce SPL much lower. Energy is not equal to SPL. One cannot reproduce midrange with funny sized driver and even the mid IQ morons know that. So when we define the working range of a given HF channel, we look higher than 9-10kHz. It is important to be mentioned that it is the crossover frequency, not the limits of the tweeter.
Now the morons, who have their audio IQ above the average level, are going to think they still can use their diamond, be or ceramic tweeters successfully if they use them above 10k. Well, it is not so simple. To reproduce anything above 10k correctly, one needs a HF channel which is able to work lower. Otherwise it cannot blend with the upper midrange (reproduced by other channel) in a convincing enough way and below the crossover point it will sound as the last accords of the following trombone player: http://www.youtube.com/watch?v=oe41VbsQdpQ (just like the 5 inch “bass” drivers “reproduce” LFs :-) ). I will not explain it further, despite there is a lot for explaining, but I will only mention one needs a diaphragm with at least 4-5 times the size of a conventional tweeter in order to reproduce the last octave correctly. So, Paul, the last sentence of your post is very correct.

Many, if not all, of the so called super tweeters are out of the game, because they are only able to produce UHF noise, but not Sound in the range where the human ear is still sensitive. The morons are still using them to reproduce UHF noise and they destroy the sound of their systems (there are zillions of brainless threads about that across the internet).

But the thread actually is not about the tweeters. It is for the morons who don’t understand the REAL need of having UHF capable tweeters (and again – it is the correct phase in the audible working range of the HF device).

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