Most rooms don’t need acoustical treatment.

Delay, you know when your listening room is too cluttered when you have to ask where are the speakers.

The only mystery for me is whether some room treatment might dramatically improve imaging.

The stuff I've read so far sounds awfully complicated though.

This is simple acoustic law...

Yes it seems complicated... But it is not complicated at all with some basic principle in acoustic...

 The only thing which was difficult but also it was all the fun, was the time it take me to did it right.... 2 years at turtle pace in the beginning, but a high speed in the last 3 months...

My room is now very good ... Peanuts cost and only fun.... But it is a dedicated room, it will cost me much more to install "esthetic " solutions, and efficient one in a common room...I dont  even know if i could do it.....

 The greatest asset for sound quality  is not the costly gear, it is a room acoustically well set only for music....

 

dont insult my audio room because this is a "laboratory" for me not a living room




That's the problem, most people use a living room for their listening pleasure, so it can't look like a laboratory. I'm not trying to say all your ideas are bad, some are quite good, just seems like you have every tweak known to mankind in there. I don't know how every tweek you use can add up to a sonic benefit.

That's the problem, most people use a living room for their listening pleasure, so it can't look like a laboratory. I'm not trying to say all your ideas are bad, some are quite good, just seems like you have every tweak known to mankind in there. I don't know how every tweek you use can add up to a sonic benefit.

Thanks for your observation...

 You seems a fine soul then i apologize for my rude and direct asnwer...

 I perfectly understand that people cannot transform their living room like mine...

 In the other hand  we cannot erase the fact that an audio room is the best asset...

 if only one of my suggestion is  helpful i will be pleased thats all...

 My regards to you.....

The balance between absorbers and diffusers, scattering vs avoidance of coliding sound waves.  
And then the focus should be an understanding of which frequencies are handled by each panel.

no one talks about this