Since I don't wanted to invest too much into acoustic treatment, I set up my monitors and the subwoofer the best way I could in my room, by measuring with a software called Room Equalizer Wizard (REW, freeware) and an omnidirectional mic. I then started to apply equalization to get at least my frequency response as flat as possible.
I know that doesn't help with reflections, delay time (not too much a problem here) and room modes, which are definitely a problem in my room too.
Now the setup sounds quite amazing, and is quite linear as well - I feel like mixing got way easier than ever before. Having a monitor setup that you can fully trust is essential for good mixing/mastering I'd say, and my mixes never sounded as good on other speakers before too.

Is there any major downside to doing room correction by this method? I know that the EQ changes are quite extreme so I'd love to hear your opinion on that.

Here's the correction that I applied:


Would love to hear your opinion on this!
Artless Venture ♢