About to invest in room treatments; GIK, RealTraps, DIY -- what is your experience?


I'm reaching the point soon where I'll invest in some treatments for my two channel listening room. Standmount speakers with tube amps. Room about 28x14ft with low ceilings, 6.5ft. Probably different kinds of treatments are needed. I'm not exactly sure yet what I'll need or how much to spend. This is not my final listening room, but I won't be able to configure another one for a few years.

I've seen many people tout GIK on this forum and I'm already communicating with them a bit. I will also reach out to Real Traps and possibly others. I do not feel bound to go with just one company or solution, so if you've mixed and matched, I'm curious about that, too.

Any recent comparisons between these two, or others? Do you have stories of good or not so good products or service? Any comments about the value of competing products? I'm not super handy or have a lot of free time, but DIY is also considered. 

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I'm not against the idea of a Helmholtz resonator type of solution, but I'm not yet sure which frequencies are most problematic. I do not have too many peaks, the greater problem is with nulls. 
My Helmholtz-Fibonacci resonators are not ordinary Helmholtz resonators... I use many ordinary one i created myself but this one is more powerful....

The most important factor is the ratio 1.618...between pipes



The series of proportionate lenght between this "silent organ" like set of pipes cleaned most frequencies ....It takes me one hour to make them with some 3 bricks in my basement and unused copper regular plumber pipes of 1 centimeter1/2 diameter....

They act marvellously at one condition: the ratio must be respected to not impair the balance between interacting frequencies...

Only one or 2 inches, too much or too less, on only one pipe, will produce a not well balance sound very audible...Approximate measure around 1 centimeter will do no audible harm tough ...

My idea come from the best Book ever about the mathematics of the golden ratio....Then i coupled the ratio idea with Helmholtz idea....The golden ratio, like pi or the number e pilot the universe at all scale....

https://www.amazon.com/Mathematics-Harmony-Contemporary-Computer-Everything/dp/981277582X

By the way the key to Greek acoustic and Egyptian acoustic is this ratio...I read a book about that 45 years ago....I remember the price of the book : 125 dollars in 1977.... A very great book i never regret it....In french or in english it is sold today at the same price than 45 years ago, a real bargain today in relation to inflation....😁 It was an analysis of the Karnak temple in 2 volumes in Egypt by Schwaller de Lubicz..." The temple of Man"...
https://www.amazon.com/s?k=schwaller+de+lubicz&i=stripbooks-intl-ship&ref=nb_sb_noss_2

But these 2 books are 1000 pages each almost and not easy reading.... 😁



«Did you know that branches dance around the trunk in a spiral which is the golden number? For sure my wife also dance always like this around men»-Groucho Marx
One thought as well, before investing anything, spend $100 on a measurement microphone and learn how to use REW or something similar.  We are not talking cables here where the difference if at all is debatable. Acoustics can provide measurable improvements and a good place to start is knowing where you are starting from.
I have ASC, GIK, Michael Greene, and acoustic field products in my room. I have anywhere from sub-bass absorbers to diffusers. Both GIK and acoustic field offer diy products and videos to build your pieces. I bought the 8 dvd set from acoustic fields to build pieces. Any of the above mentioned companies will work with you on what you need to treat your room. Also, I think argent is no longer in business.