Compression Horns for Far field listening

The exotic dealer in my area, Deja Vu Audio, makes custom designed systems, including systems built around full range drivers.  Quite often, the full range driver is utilized full range (i.e., no low-pass crossover network feeding the driver) with a tweeter that comes in way on top 5 to 10 kHz crossover points (typically first-order crossover and an L-pad attenuator).  I've heard several of the full range systems before and after the tweeter is added; I always prefer them with the tweeter.  The tweeter does not act so much as to add high frequency content, rather, it seems to smooth out the frequency response and make the full range driver seem less peaky and harsh.  

Now i mentioned to Richard, classical really does not have much highs,

Nope. Classical has just as much in the highs as anything else.

The tweeter does not act so much as to add high frequency content, rather, it seems to smooth out the frequency response and make the full range driver seem less peaky and harsh.  

I've seen some where the tweeters actually fired to the rear, since the main speaker (in this case a 6" PHY did quite well past 15KHz but like any FR drive is beamy. The rear firing tweeters opened up the sweet spot a bit and corrected the room energy if you are off axis.

Fostex FE208EZ is built to work with a tweeter. It doesn’t have extended HF and low-mid range dip. But I’m not sure if it can work with simple ported box.
Most of FR drivers have extended HF and as result they have recessed low-mid range. To get a balanced mid-range FR driver needs a front horn that amplifies low-mid range.

Here is the video - Tune Audio Marvel with Fostex FE208EZ and Horn Mid-tweeter
https://youtu.be/JCLuH_NeVgI

Fostex FE208EZ is built to work with a tweeter. It doesn’t have extended HF and low-mid range dip. But I’m not sure if it can work with simple ported box.
Most of FR drivers have extended HF and as result they have recessed low-mid range. To get a balanced mid-range FR driver needs a front horn that amplifies low-mid range


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Been watching a few, well there is only a few vids of FR in action on YT, One one Lowther vid,  one YTer comments , saying he has built many FR speakers, then goes to list them all, , states FR   top end will require  a  tweeter,,Which is my exp  with this 6.5 DavidLouis,  
having mentioned to Richard Gray the fac most of my classical listenings do not require the need for highest fq range (such as jazz, blues have drum snares, cymbols, = high end demanded) he did say the need for a tweeter is for <<ambience>> in the classical. 
Now that was the key word/concept that helped me understand the need for the Tweet/TIHorn. 
Which i have no issues with addinga  tweeter. 
I've been listening to my 6.5  and have come to the conclusion, FR with or w/o tweet is the listening experience i've been searching for past 20 years. 
I was stuck on  following the traditional/conventional xover /lower than say 91db model. 
THis style of voicing music will not in any shape/form meet my criterion as <,High Fidelity>> at least not with a  tube amp. 
Each  style of speaker has its own characteristics, = ambience. 
Tradition xover speakers I have tagged as << the wet blanet>> group. all of them next to FR will sound like a  wet blanket is thrown over the speaker.
For me there is no contest, FR will beat out any lower than 91 db/xover speaker in the world. 
FR + TI Horns are the future of the speaker industry. 
In 10 years labs such as ScanSpweak/Seas will shut down all production on any under 91/xover variety drivers, = 99% of their inventory. 
The future is FR/Compression drivers. 
I can see it, feel it, hear it. 
Its just a  matter on time.
Hopefully my series of YT vids will give audiophiles a chance to hear what a  FR/Compression Tweeter  is all about. 
My mantra is <<sensitivity is everything in speakers>> if the Sens is not over 92, just forget it.
Another way of saying is <,if its not FR/Compression, just forget it>> 
Those boxed types we all grew up with since the 1960's, til today((??!!??!!)  have been replaced by FR/Compression drivers.
Once you hear a  FR/Compression , you'll never go back to traditional speakers. 
How those xover concepts lived on so so long, is a mystery to me.
You;'ve been duped, scamed. 
Seas sells a  FR, $800, each. I would never pay that kind of money, when i can get a  pair under $500.