Most rooms don’t need acoustical treatment.

I forgot to say that my room is now near perfectly refined for my particular structured hearing abilities and potentials not for ALL human ears like in a very great hall...But i dont doubt that my room sound relatively  well tuned for all ears...It seems so if i see the reaction of my children...

Acoustic of irregular or difficult small normal room obey and react to sound in a different way than a theater, or than an ideally acoustically designed audio rrom... Geometry, topology and content matters.... The mechanical equalizer was a cheap way in money to design my own audio room without the need to reconstruct my room...Passive absorbing, reflecting, and diffusive materials, even well balanced are not enough sometimes...Especially in 13 feet, irregular, but square room with 2 windows and with a complex acoustic content.... We must accomodate the response of the room to the speakers not only the speakers to the room... the mechanical equalizer can do the 2 function at the same time without modifying the basic parameters of the speakers directly...The different pressures new zones created by the equalizer itself are intermediary between the speakers and the room in the 2 directions, because the pipes grid begin with a few inches straws from the speakers and increase to 8 feet high, like observed an astute observer, oldhvymec ,the organ tuning pipe in a church...

We can call the Helmholtz mechanical equalizer, a "silent organ" indeed and i called it so indeed in my first post about it in my thread...

My best to all....

I considered Helmholtz resonators decades ago but purchased two pair of Hallographs supplemented by SR HFTs.  I agree with Mahgister.   My tuning is for music, not scientific measurements just as an anechoic chamber is made for testing, not music.

DSP is just a tool, which most professionals use as part of their toolkit.  Room design, acoustic treatments, speaker location, and DSP together is the best solution for most.  Sometimes you can't treat the room, sometimes you can't place the speakers where you want to.

DSP is just a tool, which most professionals use as part of their toolkit. Room design, acoustic treatments, speaker location, and DSP together is the best solution for most. Sometimes you can’t treat the room, sometimes you can’t place the speakers where you want to.

I agree with you...

My mechanical equalizer so powerful it is cannot be used in a living room and setting it by ears is not for everyone... Not much more that setting a piano strings is for everyone...

But i learned much in the process about speakers/ room /ears relations...

Audiophile experience is here not in electronic design upgrade...

Acoustic is key but you know yourself already that...But most did not....

 Thanks for your numerous interesting threads....

Electronics and speakers are at most 50% or less and the other 50% or more is easily the room. But, we seem to have ’know it alls’ like the OP who seem to think the room doesn’t matter. It is kinda funny when guys spend thousands of dollars on power cables and such, but refuse to spend a dime on the room. For instance, if the upholstery on your big couch is leather or something else will have a much bigger impact on the sound than if your power cable cost 40 bucks or 4000 bucks (facepalm!).