For those interested in room correction especially bass - I have shared a bit of my experience with corrections in acoustic and electrical domains in this post.
Additionally: don’t focus on SPL only but
- ETC for early reflexions (cannot be fixed by DSP, absorber/diffusers required at early reflexion points)
- RT60/Topt for room reverb (cannot be fixed by DSP, bass traps/absorption/diffusion help)
- Spectrogram for 20-300Hz for the amplitude and decay of room modes (amplitude can be lowered by DSP, decay time requires bass traps)
- EQing the overall response using a room curve that is not flat but slowly decreasing, and EQing with caution : no big boost, no need for a super flat target. Allow for high Qs for low frequencies, but not above 250Hz.