The Law of Accelerating Returns

Don't worry Jerry I hear Ukraine is going into the scrape Iron business and will become the new world leader in scrap Russian iron for building a BETTER Ukraine.  After they refine the crappy alloys used enough, they could use them for new toilets and sewage line infrastructure. You know, "here's thinking of you" FLUSH!  

This guy really understand the Helmholtz method, it is a COMPLETE system if used correctly. Bravo.. About 1 in 10,000 really get it.. 

The ROOM, and then the room and after that, the room and when it's all said and done, THE ROOM!

mahgister get's it..

The rest are settling for "good enough for me". That is just fine also. Some want more, some want less. That is what makes the world go round..

I'm 100% sure 80% of the audiophilers out there have spent a lot more on their systems than me.. I commend you.. The time I spent learning about room acoustics has been the single greatest enhancement of ALL the changes through the years of listening.. It was also the least expensive..

Thank you mahgister, MC, OHM, and a few other...

Helmholtz treatment "only" work on ONE frequency and to bring down a peak in that very specific frequency and nothing more or less.

NO! they can be used to notch around a frequency. To contour a particular frequency or by using slot vs tube vary a single resonator to encompass several frequencies with less control but over a much wider bandwidth. 

Helmholtz is the ONLY way to tune a room completely. 

I've even used passive radiators as frequency collectors vs frequency producers. 

The concept can be used to increase a given frequency by notching around it and lowering the over all SPL. I use several different resonators and  two huge 100+ cubic foot pipe collectors. It looks like a pipe organ turned sideways in both corners of the front wall, floor to ceiling 36 x 36 x 96" but they are behind the wall. Different diameter ABS tubes are sticking out of the wall.

Many of the tubes are capped, about 1/3 aren't, the ones that ARE capped are used to diffuse, the ones that are not, are used for tuning. You simply push or pull them further in or out of the wall. You pick the correct size 1/2" - 6" pipe uncap it and tune it. I also use 4 more adjustable tube traps for the rear and sides, with slot style wall resonators for fine tuning.

You can hear a fly fart if you want.. :-) I think that would be in the 18khz range.. LOL

10hz to 15khz 100% tunable..

BTW ALL the traps on the walls and floor are decoupled from the wall and floor..

Speakers, Subs, and any object with equipment on it.. (Especially TTs) are decoupled. A sound changing experience for life. The same for servo driver systems and small planars.. A different sound that is very appealing to me..

Equipment? Gear? Take your pick and go from there. After the ROOM everything else is pretty superficial. All those thing that did make such a big difference before don't amount to a hill of beans.. 10K integrated means squat then, when a 2K total system will sound better. It's the room and tuning it along with decoupling and refining the quality even more.

Did I mention electrical? :-) This is when "Doris get's her oats".