Speakers The single most critical component

First, I agree 100% with you about the importance of acoustics. its a crucial aspect of sound quality. Id go as far as say that I dont think you can get hi-fi sound without a properly treated room.

" For the reflections point coming from front and back meditate this short abstract of a scientific paper"

early reflections coming from the front wall? physically impossible, reflections coming from behind the speakers are secondary reflections and will affect the SBIR, but apart from open baffle or Maggies, no early reflections are coming off from the wall behind the speakers.
secondary reflections are good by definition. early reflections are always bad. no matter the room. do you know the definition of a early reflection and the difference between early and secondary reflections?



" For the first reflection point all is relative to other factors in the room: geometry, topology, size, acoustic content of furniture, walls, ceilings floors etc. Then NO RULE is valid for ALL room save a balance that must be created by the tuning experiments by our own ears..."

ok, so no mics or measurements?

The understanding of early reflections and how to make a small-medium room transparent acoustically is well established by now. Acoustic is a science. Not much mysteries left there. every room is different, but every room will have early reflections points. and the same method to stop the detriments from early reflections is either diffusion if you have a huge room, or in any normal room, absorption. "furniture" wont change anything here. Rugs either.



" control of "timing" of early and late reflections complementing the passive treatment but control of the relation between each speaker direct wave with the location of different resonators near the speakers and around the room, this use of each speaker will make easier for each ear the recreation of distance then of "imaging"

wow, not sure i understand this sentence. Resonators tackle specific FR bands. every room will need wideband absorption at early reflection points.


Acoustics is relatively simple

1- find the best listening position. good guideline is start at the 38% rule.
2- Find the best speaker position. Place a mic at the Listneing position and move the right speaker around until you have the smoothest bass without major peaks, avoiding the most crude bass modes. repeat with the Left speaker.
3- absorb the early reflections ( ceiling, side walls, floor, behind the listening position)
4- add 20 inch bass traps floor to ceiling in every corner of the room

Everyone following these steps will have a good measuring room (FR and decay wise)

I dont want to argue but like i said EACH room is different...

And what is important save the optimal ratio between reflection and absorbtion and diffusion related to EACH specific room is the TIMING THRESHOLDS Optimization...

Then i use contrary to general rule some reflection at early reflection points this is NOT AN ADVICE i give to all.... This is MY SITUATION in my room....
General rule in audio thread are only that general rule, i prefer my listening experiments and optimization for my room and for my ears and scientific research to help me....😁

Read that to have some idea of what i speak about:

«An essential point is that an auditory temporal window
does not have a rectangular shape, but it has a slope at each
end. Therefore, the conventional rectangular division of
reflections into an early and late part in time is overly simplistic. As suggested by the definitions of ASW and LEV
mentioned before, the perception of them relates strongly
to the law of the first wavefront [17]. Namely, as Bradley
and Soulodre describe in their paper [4], sound arriving
shortly after the direct sound is integrated or temporally
and spatially fused with the direct sound. Thus, increasing
levels of early lateral reflections increase the apparent level
of the direct sound and cause a slight ambiguity in its perceived location. These two effects contribute to the resulting increase in ASW. Later arriving sound is not
integrated or temporally and spatially fused with the direct
sound, and leads to more spatially distributed effects that
appear to envelop the listener. This description well
explains the relation between the perception of spatial
impression and the law. However, it is insufficient for a
deep understanding of the relation, because it is qualitative
but not quantitative.
Here, to facilitate understanding of the relation, let us
suppose a simple sound field consisted of a direct sound
and a single lateral reflection of constant level. According
to the law, when the delay time of the reflection does not
exceed a critical value, which depends on the kind of source
signal, only one sound image is perceived in the direction of
the direct sound. Then, ASW is perceived, but LEV is not
as explained above. That is, the reflection contributes only
to ASW. On the other hand, when the delay time exceeds
the critical value, two sound images are perceived separately in the directions of the direct sound and the reflection [18]. This phenomenon is called ‘‘image-splitting.’’
Then, LEV is perceived as explained above. Furthermore,
only LEV is perceived, based on the conventional physical
measures which divide reflections into an early and late
part. However, some questions arise from this case. Should
not ASW also be perceived simultaneously? If ASW is also
perceived, how much does the reflection contribute to create each of ASW and LEV? »


https://www.researchgate.net/publication/223804282_The_relation_between_spatial_impression_and_the_law_of_the_first_wavefront

Resonators tackle specific FR bands. every room will need wideband absorption at early reflection points.

I use resonators in my own way to guide and change asymmetrically the driver and the tweeter direct wavefront of each of my speaker  then differently for each ear and i use reflection to guide these waves to my ears in time...This help me to create this listener envelopment impression....

The 32 resonators distributed in particular locations with variable and orientable necks help me to control the timbre perception and imaging....I even use 3 cylinders without neck....

Like i said general rule are only that general rule...I dont go with a general rule, it is useless for optimization i did LISTENING EXPERIMENTS.... And the extraordinary results are only reach by some optimization of the resonators and of the reflection/absorbtion timing ratio...I cannot give a rule always the same for each room sorry....

Optimization ask for timing threshold coordination with reflection not only absorbtion...I used reflection at early reflection

What i do anyway is not for a living room by the way....

My audio room is ONLY for audio ....

But the most important luxury in audio is not the cost of the gear but a dedicated room....

I would not disagree. If you start with the speaker then find the amp/preamp that sounds the best and go from there. 

But the most important luxury in audio is not the cost of the gear but a dedicated room....

I agree

On the other hand I also think that good speakers sound better in a non-dedicated room than some bad speakers in the same room ... that's why in my opinion, the speakers (after the room) are the single most critical component.