New listening room problems

Hello,

I am moving to new audio room. Its quite complicated due to very low ceiling and.. its all bare concrete. Current dimentions are 2.3x5.8x6 meters (Height, Width, Length). I have great success in the pats using golden ration of 1 x 1.6 x 2.56, and that would result in 2.3x3.68x5.888 meters, which mean I would only need to “narrow” one wall.

What could be an easy partition to put in place to test the optimisation?

Otherwise, what other suggestions may somebody have to deal with a low ceiling reflections? I have read that quite a of absorbtion on the ceiling can help.
 
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Room 2 is my current layout. R1 could be modified by building a partition wall. I don't know if its worth the effort, perhaps somebody can advice? Is there a way, and perhaps somebody has done it, made a movable refractive/insulating panels on casters just to check?

Height remains the same at 2,3 meters.
As far as my experience goes, first I need to increase surface absorption - carpets, drapes etc. I could apply ~60-100mm of dense rockwool to the ceiling (see picture), ideally would not like to "gap" it as the height is already limited.
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And then start measuring (get a calibrated mike + some software) and start setting up refraction panels?
I have really little to no experience in acoustics, so any guidance on the right course of actions is appreciated.
 

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Hi, I also have a problem since I've changed my room , now I have to much reverb !, bass just sounds bad, loud and bad , kicks aren't kicks anymore , they are short 808's.
I need some foam to kill the reflexions , As the couch , window curtain, ain't enough anymore.
Any suggerstions ?.
Room is medium size : 5 x 4 x 2.7 meters.
 

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Skip the calibrated microphone unless you have other plans for it. Measuring room acoustics is mainly comparing before and after. And not that simple, in small rooms there is hardly a diffuse field.

Generally, 6cm of absorption is (very) effective above 300Hz. If you can however, use a thin layer of 20mm on 100mm air gap. That gives you broad band absorption from 100Hz upwards. Standard suspended ceiling stuff, how ugly it may be, is very effective and appropriate.