Super tweeters are very important! For your dog, your cat or your dolphin, if you have one.

My tweeters go up to 40khz. My dog alerted to a passage on a Miles Davis CD. I heard nothing abnormal.

Sooo.. why go beyond the 44.1khz of a CD? 🤔

Everyone talks about "audio bandwidth" as though there is actual music at 20khz. In fact, virtually all musical content occurs below 4200hz. The top key on the piano keyboard .. C8.. is at 4180hz. Middle C .. C4.. is at a mere 261hz Ride symbols usually crash at about 600hz. Hi-hats are typically at about 2,000 hz. Even that delicate tinkling triangle is unlikely to be any higher than 3khz. So where are all those harmonics, we keep sweating over? If we take the tuning frequency ..A4.. which is 440.hz we have harmonics every 440hz ... the 10th harmonic of A4 is at 4,400hz ... yes the 10th harmonic. Once you get past the 4,200hz musical boundary, all content is harmonic in nature. By the time you get an octave above that (8,400hz), all you will hear is pss pss and ting ting... and an octave above that (16,800hz) is virtually silent. That expensive super-tweeter will just sit there doing nothing... But you won't know that, because you can't hear it. Most people don't hear anything over about 15khz. Then there's the matter of wavelength ... at 20khz a sine wave, in air, is only 1.7 cm (5/8th inch) and even the tiniest misalignment will result in cancellation, not augmentation. That is, misplacing the super tweeter device by even 8mm (1/4 inch) could have a destructive effect on the highs you already enjoy. I will agree with Paul that going beyond 20khz with the electronics makes sense in terms of time alignment and not skewing the phase of actual musical content at lower frequencies ... but to do that with speakers is just a complete waste of effort and money.

Not easy to phase align tweeter and supertweeter.

Hebden Bridge is just a few miles from where I live, I have 2x sony vintage super tweeters but not much knowledge how to install them in a 3 way X-overs

After 23 years, in 2023 I bought thin-film AMT ribbon tweeter speaker GoldenEar BRX and I love them so much that I bought a 3rd one as the center speaker for the home teater. source=Apple Music lossless

As someone else's comment mentioned in the comments, if you're not an audio expert (a real one,t not a phony one), you should refrain from making absolutistic statements about things you have no experience with. It's sort of like the audio cable thing; like the fact that most cable doubters, with their theories about cables have never actually owned real expensive audio cables to know what they're talking about.Most commenting on super tweeters have never actually owned and lived with a good super tweeter. As far as this subject is concerned, rather than playing a single test tone over 20k, it would be better to play two test tones together,; one at 10k or 15K and one maybe at 25K, and see if people can tell the individual tone, from the one that has the combined tones. Our hearing can sense vibrations. On the other end of the audible spectrum, we are supposed to be able to hear only as low as 20hertz. Yet if there is lightning and thunder, we can sometimes hear rattling sounds from the thunder as the the noise of the thunder goes below 20 hertz. Same with super tweeters and their frequency range. I have had two different brands of speakers with built in super tweeters. When you disconnect the super tweeter,s you can always and easily tell a difference. They usually cross over from the regular tweeter at 12 or 14K. I hear crisper and quickerr transient response. My one one super tweeters diaphram weighs less than the air in a whisky shot glass, says the manufacturer. While I don't think that a super tweeter is absolutely mandatory; you can tell the difference even though only the highest overtones of musical frequencies can reside that high up in frequency. When they list highest frequencies of musical instruments, they don't generally list what their highest overtones can be.This is a perfect example of how bad and wrong information can be dispersed in a comments section by theorists (flawed ones) and the accompanying follow the leader mentality. If you've never lived with a superb super tweeter, you just don't know. Once again, it's like people discussing what Spain is like, who' have neve actually been to Spain; or even been to the European continent at all.

I always thought super tweeters were used in older speakers that had paper cone tweeters, as they struggled up so high. So it doesn't really effect dome, ribbon, amt, etc type tweeters.. Though like many things in high end audio. Could be just a myth..

Low distortion with the existing tweeter has to precede the importance of connecting up a super-tweeter. Get that first and only then think about adding super-tweeter. Me, I don't need it much.

It's purely academic seeing as at our age and any age above about 12 our hearing starts to decline from the 20-20 hearing to ...well at our age 20-14 or less. But I still like the chat

Naim amps generally have a brick wall cut off after 20khz

Love my JVC Ribbon tweeters that go out to about 40kHz.

Trading my pair of super tweeters for a pair of Hokas. Standing up to listen.

If you can only hear up to 20 kHz, what benefit will a super tweeter that goes beyond your hearing have? It’s like saying my TV can display infrared and ultraviolet light.

I use premium class A/B amplification. My speakers are described as ‘high end’ whatever that means, by all reviews. The manufacturer’s website described them as mid-range flagships. I do have a £1200 pair of ‘super tweeters’. They do make a notable improvement. The question is, had I spent £1200 more on my floorstanders, instead of my existing floorstanders plus super tweeters, would I have ended up with a better all round package?

I haven't had the pleasure of listening to any speaker system with a super tweeter. If they actually do make the kind of difference that Paul is speaking about then that falls into the category of high-end audio and should be available in the marketplace. Unless anyone who is commenting is an audio design engineer, I think they should refrain from making remarks about dogs and bats without knowing the real psycho-acoustic facts.

Super tweeter makes sense, if you are Batman or a Bat.

my AVA amps and pre amps go out to 500kZ, and min distortion...well under .01% at all freqs...and they don't cost the price of a Porsche, cus there is no reason for most over priced jewelery. Drives my Legacy Whisper so fine

Just what have I looking for this week.

WWW: what works where. In a few environments there super tweeter are appropriate, however you are probably building that room.