What kind of tweeters do you own?Audio devices are for making audio. Of course you can investigate past what's audible.
Tell me why one wouldn't measure with 100MHz bandwidth
What kind of tweeters do you own?Audio devices are for making audio. Of course you can investigate past what's audible.
Tell me why one wouldn't measure with 100MHz bandwidth
Because this is audio for human hearing?Audio devices are for making audio. Of course you can investigate past what's audible.
Tell me why one wouldn't measure with 100MHz bandwidth
That’s a massive straw man and you know it. The graphs show distortion of the audible frequencies. For that you need more than audible bandwidth.. 100 MHz does not contain any measurable distortion products of audio from 1 Hz to 20 KHz.Tell me why one wouldn't measure with 100MHz bandwidth
To be fair, we don't know how high he can hear.That’s a massive straw man and you know it. The graphs show distortion of the audible frequencies. For that you need more than audible bandwidth.. 100 MHz does not contain any measurable distortion products of audio from 1 Hz to 20 KHz.
That is irrelevant. Air cannot move at 100 MHz.To be fair, we don't know how high he can hear.
Sometimes a joke is just a jokeThat is irrelevant. Air cannot move at 100 MHz.
ExactlyBecause this is audio for human hearing?
Wrong.That is irrelevant. Air cannot move at 100 MHz.
If it did not make sense to me that the two graphs showing THD+N calculations had different bandwidths, my first reaction would be to ask. This is a forum after all. People ask questions. But not you. You don't need to ask. You already know better. You are here to make a recommendation.
How fascinating.
And there is no audible distortion between 22 and 45kHz (my entire point...)That’s a massive straw man and you know it. The graphs show distortion of the audible frequencies. For that you need more than audible bandwidth.. 100 MHz does not contain any measurable distortion products of audio from 1 Hz to 20 KHz.
ATC SH25-76s.What kind of tweeters do you own?
On this site (what we're talking about), the DAC and amplifier charts use 22kHz. I say the frequency sweep should as well, unless the hierarchy charts should be switched to 45.A 22kHz bandwidth is way too narrow. I use 200kHz, as does just about every single audio analyzer ever made. This is because THD is typically calculated to the 10th harmonic. Of course you can narrow a bandwidth, but if you don't have it in the first place, numbers cannot be compared.
But then came along amplifiers with high levels of HF THD and spewing garbage above 20kHz. Times change and now we have reviewers making up their own bandwidths to keep manufacturers happy and manufacturers narrowing the bandwidth to even 20kHz so their silly numbers look better to the uninitiated.
But I'm not testing class D amplifiers.
On this site (what we're talking about), the DAC and amplifier charts use 22kHz. I say the frequency sweep should as well, unless the hierarchy charts should be switched to 45.
I think if all went to 45, all devices with no multi tone/power (like img 2 in OP) would need to be retested or removed
Yes there is a whole discussion about the how THD should be measured with regards to bandwidth, and which measurement is relevant to our hearing and psycho-acoustics...You need 45 kHz bandwidth to measure distortion at 15 KHz and higher. Otherwise you’ll need to limit to a max of 10 kHz or so.
That’s why I rather look at the multitone and brought it up. It’s a much more realistic view of how it handles real music in the audible range.
If there is a big difference between the 22 kHz and 45 kHz bandwidth measurements, it means there is quite a lot of things going on above 20 kHz. That should not be audible indeed, but that’s not really what that graph is about. You’ll probably not hear any distortion above 6~7 kHz at all…
We also do don’t use A-weighting, which would make sense for audibility.
Well, I've read your OP twice and, although I (think I) understood what you were saying, I didn't see any question but a statement that both measurements should use the same BW.the trend of so many of the threads I start, the first replies are not replies, rather statements that are only somewhat relevant or even entirely irrelevant.
I needed to read your OP twice to understand what you are saying. You are correct - the single SINAD number is 13dB better than the line in the graph showing the THD+N at 1kHz across the band.- the THD+n measurement at the very top is done @ 22kHz, multi tone: 45.
The two images below show a 13dB diference