A full range speaker?

@bache , good enough? Not if you are trying to reproduce the live experience. With 40 Hz and under missing you are just listening to a HiFi.
Many people have noticed something special when they add a subwoofer to their system and have remarked about it here. It seems to add more than just bass. People say things like it adds "air" or makes "everything else sound better." You can only hear at best down to 16 Hz. But you can feel right down to 1Hz if the pressure is high enough (that would be an explosion).  Anybody who has been in the presence of a large pipe organ will tell you it is like the hand of god shaking you, an incredible experience. For those of you who have not heard (felt) one there is a list of the largest pipe organs in the world. Find the largest one near you and attend a concert. It will blow all your fuses.

I mean for regular listening  . For go down. 20hz you need sub or woofer. v big size 12-15 inch at least, A lot High end LS with small size 6" and less claimed low 30-35 Hz, don't believed

bache363 posts07-18-2021 7:15amfor good bass 40 hz and up is good enough

~~~~~~~~~~~~~~~~~
Troels Gravesen pretty much says the same thing about his 40hz+ MMT speakers with 6.5 inch mids.
**I don't EVEN miss the 40hz below region with DUAL W18's pumping out rock solid bass**
Paraphrase mine.
WE've been scammed , chasing this elusive 40hz below fq's. 
Just more snakeoil in this speaker industry.
We all drank  from the cup of baloney.

There is more to live music than the frequency of any given note especially when it comes to percussion. But, since you insist, the lowest note on a pipe organ is 8.17 Hz. The lowest note on a tuba is 16.35 Hz as is the lowest note on the Bosendorfer Imperial grand piano.

~~~~~~~~~~~~~~~~~~
Bach's organ concertos **Might** offer a  few seconds of these super rare organ notes, 
At the cost of what?? 
Crappy upper bass/low mids comming from the heavy duty woofer.
No thanks.
I do not want/need below 40hz in my system.
~~~However~~~ 
It would be nice to swap out a  W18 for a  W22 or W26 woofer. 
Just  for a  deeper bass transient.. Whether these larger  cones go down to 20-40hz I have no idea. 
If I can gain bass VOLUME/effects. , swapping out a  W18 for a  W22, I might make the tweak. 
 But this  tweak has nothing with attempting to capture 20hz-40hz, as there is really nothing there in full symphony orchestra... Cello lowest note is 60hz. 

 something special when they add a subwoofer

~~~~~~~~~~~~~~~~
That **something special*** would just grate my nerves to no end. 
Each his own I guess.
I am after clean , high fidelity, not HT effects.