Saying that the diminishing return point does not exist or vary arbitrarily , is speaking of audio experience as the average audiophile ignorant of acoustics and which believe that only the gear design matter and the price tag ...
There is difference between my low cost modified speakers and more refined and costly one, this is a commonplace fact nobody can contradict and some are ready to pay the price for them ; once this is said this does not means that acoustic factors , as dynamics, transients, timbre, imaging , soundstage, immersiveness and other spatial acoustical qualities cannot be manifested as objective factors that can be reach and put under relative controls at low cost passing over some minimal acoustical objective satisfaction level ...Speakers well embedded at any cost transform themselves completely ...This fact is not recognized by most ...
There is three embeddings controls set for any speakers at any price ...Each well designed speakers at any price will be able to give an acoustical minimal satisfaction and more if we learn how to put speakers in the right environment and under the three main controls dimensions : mechanical,electrical and acoustical ... Add to that some effective tweaks ...
For sure i could upgrade my speakers but i am so happy i dont need to do it to listening music without too much evident defects ...
The upgrade will cost too much for what it will give me ...How much, it depend of the acoustic factors manifested in the right balance with my system for my ears , it does not depend of price as much as from a new adequate embeddings for the new speakers ...
I will give an exemple :
My low cost speakers are designed with a rear porthole...
It is only that : a hole ...
Any speakers is an Helmholtz resonators . if the porthole is simply a hole of a certain diameter in my case or a tube inside, this does not means that the hole or the tube are adequately designed as refined as they would be optimally ...With my small speakers for example at this hole without a neck, i add a complex bundle of straws of different size and volume to fine tune the porthole for greater extension in the bass but way more than that a redefinition of the timbre and soundstage expression ...
No speakers designers will claim that their speakers must be mechanically electrically and acoustically embedded and modified to work optimally before or after the consumers gives his money ... Not one ...They will claim that their speakers are perfect plug and play ...
But all speakers need that three embeddings and sometimes modifications ...
When well embedded in a room we reach this point of diminishing return, which vary for low fi, mid fi and high end , but which point exist so evidently that i will class good designed speakers in two categories : well embedded in a house or not well embedded more than with a price tag ...