Small Room Optimization or Treatment

Last night i watched some Anthony Grimani podcast about subwoofer, he said that 4 small subwoofer, and another 1 giant subwoofer for the really low end frequency and play with the crossover settings maybe?

What room? Is it some kind of cinema hall?
Your room is tiny by all the standards, especially if you watch podcast from US guy where he talks about typical huge rooms in that side of the pond.
You have two directions: make smart decisions or make expensive decisions. They may be not the same. 5 subwoofers is expensive decision.
 
This is the New RT60 Graph.. Something kinda off with my soundcard before..

How do you guys think about this graph looks?
 

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Try EQ. This sounds awesome and is the cheapest way and probably only way to get correct amplitude:

Screenshot 2025-04-13 072406.jpg


The black curve represents Toole's trained listeners' reference curve, which I used as a guideline. I find that boosting frequencies below 50 Hz by 1 dB generally sounds better to me across most material. Since most bass notes in music typically fall between 100–200 Hz, this range requires particular attention. My solution to this was placing bass modules behind the speakers and cross over at 250 Hz. (Actually the speakers are on top of the bass modules, but the bass driver is around 25-30 cm behind the front speaker.)

I've attached Toole Trained listeners curve for use in REW if you want to try it.
 

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