I have a soundfield encompassing the listener position (3 feet) and 2 feet outside of the speakers with depth...
I used 100 bucks modified small active speakers ...Natural timbre and pin point imaging ..
But i modify the porthole design ...
On most speakers the porthole is not well design for esthetical and cost reason ...
The volume of the porthole must be tune , any speakers with a porthole is a Helmholtz resonators... In these resonators the ratio between the volume of the box the cross ratio of the neck dimensions is fundamental ...Most speakers designer generally did not invest invest in supplementary research cost to implement a complex porthole, especially extending outside of the wooden box...
And those designers who create an internal labyrinth for a well designed porthole ask for more than the cheap amount i paid for my 2 way speakers with a small inefficient tube as porthole... So well reviewed thy were my M-audio AV40 were disliked by me for 10 years BEFORE i redesigned the porthole ...
https://www.avsforum.com/threads/labyrinth-cabinets-are-they-good.2725345/
Then i recommend in near field a two way speakers with a rear porthole which you can simply redesigned using straws of different volume or lenght, inserted in one another and flexible ...
Doing this i goes from 85 Hertz to 50 hertz clear not boomy ...No need for a sub anymore ...
I also redesigned the wave guide tweeter form with cylinder of the right lenght adjusted for my listening position ...
Absolutely transformative ...
But no audio company will sell these modified speakers because it is too bizarre and unesthetical ...
i dont give a damn listening music quality soundfield and timbre better than all headphones i ever own ( save the AKG K340 )..
Viva near listening at peanuts costs!