What would be the easiest step you could recommend for all of us to try for ourselves?
It is a difficult question...Because each room is very different and pose an exclusive problem...a small room could be made a magnificient active acoustical tool...
It take me 2 years with a hundred at least modifications, with each one adding something to the others....
Some modification implemented in a first move will not give an extraordinary audible effect, but a barely audible one for example...There is an order to the acoustic treatment and controls...
The best is to begin with passive material treatment...
Remember that my room is exclusively an audio room and not a common room....
I dont think it would have been possible for me to go on with this acoustical journey in a living room...
i think the best possible thing to try in a living room, would be to use my Helmholtz-Fibonacci tubes and pipes...With crafty hand they can be made very esthetical work of art....
I created 18 of them , tubes or pipes with lenght around the golden ratio, by group of three...3 pipes inserted in a brick with a series of holes in it...You can begin with 3 sets of three for example....It takes few space and could be beautiful to see....
The pipes are regular copper plumber pipes and the tube are 2 types of PVC regular plumber tubes... I obstruct them with a sheet of thin plastic and introduce into the mouth of the tube a straw with a very thin diameter, half of the regular straw....You must experiment yourself with the diameter of the straw and his lenght....It is related heavily about the dimensions of the room and its geometry...
The goal with my 18 pipes and tubes was to work simultaneously on many frequencies scale in a complementary way.... And that work good.... I dont recognize any of my files ..... We dont know what we dont have in S.Q’ save if we experience it first.... Most people have no idea of what is lacking in their S.Q.
Acoustic is the golden road of audio, not upgrading......upgrading before listening to his system in the optimal condition and at his peak level is a waste of money....Upgrade must be made AFTER the embdeddings controls not before....
Bare in mind that passive materials treatment are only half of the way, the other way is the active non electronical controls, in the form of Schumann generators, Ionizers, and Helmholtz tubes and pipes....
The passive material treatment with reflective panels, absorbent panels and diffusive volume and their balancing distribution are half of the job... It is possible to make it in an incremental way but it takes time and it has been fun and rewarding...
The active way is also necessary why?
Because we dont listen only to the sound coming from the bouncing from the passive walls no more... We listen to the activated room now with the S.G. the ionizers, and the Helmholtz-Fibonacci pipes and tubes acting like different pressuring engines in the room.... The sound is a creation of the room now interacting with the speakers but the room is like a dynamical pressured engine but no more an homogenous one and a passive one....
The audible impact is huge....No upgrade can beat it save for the highly costlier one and even that to be satisfying must be in their controlled working dimensions.... A highly costly system can sound unnatural in a non controlled room and environment..I listen to some on youtube....Even with youtube the deficiencies were very audible coming from a bad room...
The sound waves in a room are like the tensed strings of a violin where the minimal touch create an intense precise sound.... The waves can make near a 100 bouncing in a second in a small room and this boucing in different pressure engines and zones of the room create a frequencies response very strong....Instead of making complicated calculus i decided to install with Fibonacci ratio different pipes with 3 different diameter and lenght and with different neck lenght and sometimes no neck only a hole in the plastic sheet....
The idea was to make the different pipes and tubes working complementarily.... Without calculus it worked for me i used my ears to decide for the lenght of the straws and their diameters.... The slightly modifications were very audible for me but in a room already heavily modified....
This is the best i can give for an advice.... It is fun but it takes time and cost me almost nothing....I dont need any upgrade now.... Consumerism is not always the way to create a very high S.Q. and it is not necessary the best way at all....
Dont upgrade, embed everything rightfully....Mechanically, electrically and acoustically.... It is the motto resuming my method....
My best to you .....