Low-sensitivity speakers — What's special about them?

What it comes down to is... really good mids with any type of top end extension without cone break up is hard to find in true high sensitivity speakers.

The Classic Audio Loudspeakers use a beryllium diaphragm with Kapton surround in their compression drivers; the first breakup is at 35KHz. The model T3 which I have at home is 97dB and 16 ohms, flat to 20Hz owing to dual TAD 15" woofers.

All transistor amplifiers (except class A) have thermal distortions (similar to low sensitivity box speakers). The transistors parameters change with changing of temperature.  
This distortions have inertia. As result you can't fix these distortions by feedback.
Our brain is very sensitive to these kind of distortions. These distortions cause tiresome and decrease enjoyment from listening music.
So, if you use combination of low sensitive  sensitivity box speakers with powerful  transistor amplifiers you get thermal distortions in a square.
As a result, you have a tiring, depressed, suffocating, annoying sound.
I think this combination is the worst delusion of audio industry.
Sadly, most of audiophiles don't understand it. 

Thanks. I'll try to watch the video. Extended auditions are in order. 

@tomic601 , Happy Valentines Day to you too, sir ! LOL. We all have a story, so I hope my story is interesting, and not too long, so, I apologize. I have stated in many posts, that personal taste, is what this hobby is all about. The arguments between SQ differences folks have, have been ridiculous, as far as I am concerned. The earlier someone finds their cup of tea, the easier it will be to build a system around that, tweak it, get it closer to their ideal. During my childhood ( before 10 ), my dad had a Fisher 500C, Dual 1229 with Shure cartridge, feeding AR3a speakers ( all of which I had acquired after his passing, and just recently sold, very reasonably, to a listener who would enjoy them much more then I ). My dad, wanted to move away from the Fisher, with the onslaught on these ss Japanese receivers, and replaced it with a Sansui 881 Deluxe. At that same time, I had just received my pair of Klipsch Cornwall Verticals from my singing coach / music teacher ( he upgraded to Khorns ), and I used the Fisher, along with an AR table. That was the time, when my ears became " tuned " to the horn sound. I found the AR3’s amazing, do not get me wrong. I became a tweaker, sold and managed at a few audio stores, became a rep for a short time, and then became an independent audio consultant, helping people spend their money on systems. Not everyone liked Klipsch, Altecs, JBL’s, etc, as much as I. I understood the varied differences between all of the speaker designs, and at the same time, I understood the weaknesses. I owned multiple systems, having owned Vandies, Maggies, MLs, DQ10s, Gale 401s ( a wonderfully musical, yet very inefficient speaker ), and so many others, and heard a plethora of others during my travels. Same with the front end gear. Before, and during the intro of digital, I was enamored with open reel tape, which was fabulous, in every sense of the word. I also realized and understood, at an early age, that recorded music, will never sound like real, unamplified music. Once the instrument, or voice, reaches the microphone, it is a done deal. Those listeners who keep changing equipment, like I, underwear, fall under several categories. ( 1 ) Have not found their flavor, ( 2 ) Are looking for a " sound that does not exist ", meaning, very high expectations, ( 3 ) Does not have the auditory expertise in system matching and development, ( 4 ) Have not spent enough money on the equipment, ( 5 ) Have spent too much money on equipment, to the point, they are hearing every weakness of the recordings, which are many, and is why, what they listen to, are only the best mastered, and not necessarily, the most musical, ( 6 ) Does not have a " reference " of music reproduction, to guide them, ( 7 ) Have a serious, neurotic personality, ( 7 ), Can simply, never find happiness in a system / room........There are more, and of course, a combination, of many above. I am not trying to sound like, or appear to be, a know it all ( although to some extent, I do know a few things, lol ). Again, I apologize to all. Enjoy ! MrD.