Speaker fq range, bass, low bass, low mids, mids.upper mids etc


The ther day while looking over Troel Gravesen's super high tech speaker designs,. I came across on one of his designs, a  descript of how he breaks down the fq ranges, and how he addresses edach range in that particular design. 
I just looked and can not find where he made these fq band width segmentaion.
If anyone can find it on Troels pages, plaese post the link
Or else if you know of a link taht shows how each fq range  can be generally divided up, please , be kind enough to post the link

Anyway, while searching for such a  fq band width description, I came across this article. 
Not saying I have read it carefully, but skimming over the article , lets me know this science is way out my range of understanding. Although I get a  idea of what they are talking about.
Distortion/coloration/poor voicing of certain fq;'s in  a  given music source.
All of which will 100% guarantee result in  that~~ old ~~but ~~faithfully ubiquitious~~ enemy,  Listeners fatigue.
Some speakers I get this fatigue within minutes,  While other speakers, such as my DavidLOuis 4 unch full band,,is right on the border line. At certain full orch passages this distortion goes over to grouchness = distoryion. 
Livable, but only for short term.
Anyway, 'Here is the article,.\
Please post other tech articles which will help us all to grasp the fundamentals as to why so many xover designs suffer from these distortions in various critical band widths. 
Low bass, The  Vandersteens are like Top Dawgs, maybe highs as well, vandy's come out top desigbn. Its  in the 200hz- say 3khz where Vandersteens' have  serious issues of distortion. 

Any speaker, even Bose , has some level of acceptable low bass.
High fq's above 10k hz, just about any  xover design has accepatble performance, even B&W's has acceptable high fq voicing. 
It is the critical 200hz-say 3,4,5k hz, where xover designs get into *turbid* waters, 
have you seen how many xover components Troel uses in his bigger more full range designs??
Cost  a  fortune to build those xovers. And the result? 
Perahps lower listeners fatigue, but still it exists.
= WE have serious issues that need attention in speaker design. 
I am not at all concerned about the 40hz-200hz range , nor the 10k+hz range, Not at all. As I say, most any xover speaker gets these 2 end ranges with some degree of success.
Its that super critical mid area where all distortion can be found resulting in folks buying all sort of speakers in order to escape this syndrone, this  disease  called listeners fatigue. 
It is time to stop and think through what really is going on in xover designs. 
Lets all be honest here and admit that most xover speakers have not lived up to the hype. 

caveat
: Classical music is the golden benchmark for testing any speaker, Not jazz, nor any other genre.
That most audiophiles mostly listen to all genres, with CM at the bottom of their list, its no wonder none of  the complainst I rasie above are being considered nor accepted. 
Classical music will clearly reveal all the faults and weaknesses that you can not hear in your xover speaker. 
Its there (to SOME DEGREE), either you pretend not to hear these distortions or else you  have no clue as to  how high fidelity should  be voiced.


Vandersteen low bass #1, highs #1, Mids,, ahhh we have problems folks.

https://asa.scitation.org/doi/10.1121/1.5078770



mozartfan
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The truth of the matter is 90% of the audiophiles here in the USA have no idea what a  wide is, how it works./sounds, 
sad state of things, if you ask me
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Catch your breath now.. Slow down..

I like MY speakers.

I like my STUFF that makes them work. How’s that?

I’m a simple fella , FELLA!

  Any time you want to listen instead of TALK let us know.. Might get you fixed up..:-)

Come on dog.. Time to feed the chickens..


Regards
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He did. Don’t bother trying to post anything folks as his mind is closed and this next point is key. Of all the knowledge available in the world of audio on this planet, both past and present, Mozartfan thinks he alone surpasses it all! The fact is no human could ever possess even 5%, but here we have someone that possesses 100 plus percent. When you sense that fellow Agoners, it’s time to step away from the foolishness.
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Mozartfan,

From this, and other threads, I gather that you are a fan of the wide-range Voxativ and AER drivers.  I am a fan of both companies too, but, that hardly makes everyone else "frauds," or "fakesters" or "snakeoil."  I've heard dramatically different sounding systems using Voxativ andd AER drivers such that, if you blindfolded me I could never identify these drivers in a system; everything else about the particular system will dramatically affect what is the perceived sound from the wide-range driver.  In fact, the more variety of systems I hear with any driver, the LESS likely it is that I can identify the driver.  The AER BD1 and BD2 drivers I heard in back-loaded horn and in open baffle setups and the systems sounded totally different.  I've also heard a variety of systems using Voxativ drivers and some sounded incredibly smooth and natural, while others sounded quite edgy and brittle--implementation counts more than the particular component utilized.  The same can be said of the other wide-range drivers I've heard, such as Lowthers, Feastrix, G.I.P. Laboratories, Tangband, Jensen. . . 

I hesitate to say which drivers I like the most because, just when I think I don't like a particular driver that much, I will hear a design that changes my mind (e.g., G.I.P. 4165--I heard a system that I did not like that much with this driver, but, a recent audition where the speaker system has been refined and voiced a little differently has changed my mind).  The best system I've heard with a wide-range driver utilized the Jensen/ERPI M10 and a tweeter set to come in WAY up on top (Jensen run full-range, first order high pass set around 10k for the tweeter).  Can it be bettered?  I am sure anything can be improved, even when the goal is to satisfy just me (I imagine a fieldcoil tweeter, to match the fieldcoil M10, would be an improvement).