BLINDTEST: Midrange 360-7200hz, NO audible difference whatsover.

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Jon, I'm trying to find my measurements, but I think I lost them...

Do you match FR with 12dB smoothing? I remember that it was almost impossible to match FR below 1K because the room is so disturbing. If you would not mind publishing the example of measurement files, I'll use them as a reference for my next ABX test. I would like to referee.
 
A wide variety of music was present at this test.

Rock, jazz, classical, electronic, pop, you name it. All with enough material so the 360hz-7200hz bandwith would be tested in all sorts of ways. That's sure not an angle you can attack the test's integrity. But thanks for trying. 😉

Now, about the unfiltered thing, like explained previously the 360hz-7200hz was not an option, it was mandatory. Anything else would have made the drivers exceeds their limits, which defeats the purpose entirely.

As for the usefulness of the test, for DIYers, I think, on the contrary, it gives a very useful guideline in regards of the midrange selection in a 3-way speaker projet.

It shows very clearly that a midrange should be selected for his output (SPL) first, related to the bandwith needed, and the sub/woofer + tweeters own mechanical limits.

So basically, if you're using a subwoofer than cannot be properly used above 120hz, you cannot use a compression driver as a midrange.

Also, if you're using a small ribbon tweeter that is limited to 3khz+, you know you can't use most of the bigger cones as a midrange.

Also, if you're looking for 95db in-room, it's entirely different than a 110db project, which will restrict a lot the midrange's selection.


So, again, FR is king.
And SPL factor just follows the FR...

Again you oversimplify the entire subject. Nowhere do you include parameters such as harmonic distortion and dynamic range, which are essential to listener satisfaction.

And to assume that someone knows that they will never want to exceed 95db is naïve and misleading. Maybe if all you ever listen to is Diana Krall it would be alright, but certainly not for Tchaikovsky or Mahler. So why would anyone want to invest in a speaker that had inherent limitations.

Sure, you can make the case that FR and SPL are important. But that's just the beginning of the story. Not the end. There are other very important parameters that should not be ignored just to save a few dollars.

To put it another way, those are necessary, but not sufficient parameters for a satisfying driver selection. Yet, you tend to minimize the others to the point of misleading people here. That has been and continues to be my objection to your posts.
 
Nowhere do you include parameters such as harmonic distortion and dynamic range, which are essential to listener satisfaction.


I'm starting to think that you're making fun of me... 😱

okay let's play a game with some scenarios: driver A measures 8% THD and driver B measures 0.1% THD...

Scenario 1: nobody was able to identify A from B.
Scenario 2: someone or everyone was able to identify A from B.

What's next?
We adjust the SPL or change whatever you want to reduce the THD to 0.1% from driver A.

Then, scenario 3: nobody is able to identify A from B, once adjusted.

Scenario 4: doesn't exist because the THD was not a factor that triggered an identification because... guess what... wait for it... NO positive identification happened.

You follow?

So basically, whether 8%, 0,1% or 0,0003% THD each single drivers were during that test... No (AUDIBLE) threshold was found, about anything, including THD.

But before you drift in your reasoning, please, don't me wrong (again).... That was NOT, and I repeat, that was NOT a blindtest about THD. The threshold could have been ANYTHING. Imperfect FR, Power response, or Harmonic Distortion...

But no threshold. None. Niet. Nada.

No further analysis was needed BECAUSE no threshold was found.

NOW, if it pleases you to make blindtest strictly about THD, be my guest. You may find the audible threshold to be 5% for 40hz or 0.3% for 12345hz... I don't know. Studies were already made about it, i'm just to lazy to ask Google...

... also, that was the 3rd blindtest that showed we are overestimating our hearing capabilities.

It's a pattern.
 
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classicalfan, oh please, I am not misleading anyone here. Especially not in the ocean of misleading (dis)informations that is audiophilia in general...


But since you're gracefully accusing me to ''oversimplify things'', let me introduce you to my dear friend, William of Ockham.

Occam's razor - Wikipedia

You may not think you're misleading people, but I do.

Your conclusions are based on a very specific and somewhat complicated set of test conditions. Conditions that most people here will not typically encounter in their listening environment. You then try to extrapolate your conclusions to the general case. But it does not follow.

And thanks for bringing up Occam's razor, which is essentially "other things being equal, simpler explanations are generally better than more complex ones". It seems to me the very complex conditions encountered in your testing are in direct conflict with this principle.
 
And to assume that someone knows that they will never want to exceed 95db is naïve and misleading. Maybe if all you ever listen to is Diana Krall it would be alright, but certainly not for Tchaikovsky or Mahler. So why would anyone want to invest in a speaker that had inherent limitations.

Here we go again....


giphy.gif




Classicfan... I never assumed that Jane Doe would never want to taste the immense joys that listening to Tchaikovsky could bring at 97db, 102db or even 147db if she really wants to live an experience as much physical as transcendent ...

We simply determined, for strictly practical reasons, that the maximum listening level of 95db was both realistic and comfortable in the context of this test. We received exactly 0.00 complaints in this regard from participants, which included grumpy audiophiles in need of donuts. I try to put humor in my answer, do not blame me, It's saturday, I'm isolated in a cabin, thank you, it's appreciated.
 
I'm starting to think that you're making fun of me... 😱

okay let's play a game with some scenarios: driver A measures 8% THD and driver B measures 0.1% THD...

Scenario 1: nobody was able to identify A from B.
Scenario 2: someone or everyone was able to identify A from B.

What's next?
We adjust the SPL or change whatever you want to reduce the THD to 0.1% from driver A.

Then, scenario 3: nobody is able to identify A from B, once adjusted.

Scenario 4: doesn't exist because the THD was not a factor that triggered an identification because... guess what... wait for it... NO positive identification happened.

You follow?

So basically, whether 8%, 0,1% or 0,0003% THD each single drivers were during that test... No (AUDIBLE) threshold was found, about anything, including THD.

But before you drift in your reasoning, please, don't me wrong (again).... That was NOT, and I repeat, that was NOT a blindtest about THD. The threshold could have been ANYTHING. Imperfect FR, Power response, or Harmonic Distortion...

But no threshold. None. Niet. Nada.

No further analysis was needed BECAUSE no threshold was found.

NOW, if it pleases you to make blindtest strictly about THD, be my guest. You may find the audible threshold to be 5% for 40hz or 0.3% for 12345hz... I don't know. Studies were already made about it, i'm just to lazy to ask Google...

... also, that was the 3rd blindtest that showed we are overestimating our hearing capabilities.

It's a pattern.

You still don't understand what I am saying. I don't care if everything you just posted above is true or not. It's not relevant to my point.

My complaint is that based on tests you have run in the past you have made a very strong point that in choosing a midrange driver for a project cost and quality are pretty much irrelevant. You are saying that the drivers are all pretty much the same, so the person might as well choose the cheapest one.

That's the bad advice that I keep complaining about.
 
And thanks for bringing up Occam's razor, which is essentially "other things being equal, simpler explanations are generally better than more complex ones". It seems to me the very complex conditions encountered in your testing are in direct conflict with this principle.

classicfan, don't misinterpret Mr. Ockham for god sake the guy is dead for over 700 years he can't defend himself on diyaudio!!
 
My complaint is that based on tests you have run in the past you have made a very strong point that in choosing a midrange driver for a project cost and quality are pretty much irrelevant. You are saying that the drivers are all pretty much the same, so the person might as well choose the cheapest one.

That's the bad advice that I keep complaining about.


May I interest you in a pair of Voxativ AC-2.5 ?

Sounds delicious. It's very expensive. You'll love it.
 
you have made a very strong point that in choosing a midrange driver for a project cost and quality are pretty much irrelevant. You are saying that the drivers are all pretty much the same

Do I really need to go all the pages back and self-quote everything I already said about that?

I am, at this very moment, testing a speaker project, that is using a 250$ midrange.

250 dollars. 500$ a pair. That's hardly the cheapest one, is it?

why, then, would I go against my own ''very strong point''...

?
 
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So what it seems you're announcing is that high end sq as an exclusive concept whose attributes for the past 60 years have been out of reach for most of us is not only out of date, but usurped and rendered obsolete by readily available cheap electronics. So what's new?



I don't care what you say, I can still remember the difference I heard 40 years ago among the gear I auditioned when shopping at the brick and mortar shops.


But that doesn't change your point, a good one.
 
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