Thank you Rooskie, appreciate the response. I am somewhat familiar with the theory and I did the room EQ for up to 500hz with REW and fixed some holes in higher frequencies with wide bandwith filters as you suggested. For tilt EQ APO has this nice this high shelf filters in which you can specify the slope in DB which I used to force the higher frequencies down a bit if you will. My question is, is this good enough or should I try to EQ down to 3db deviation? Can I achieve flattter response with EQ and with my speakers or maybe I need sound absorbing materials on the walls, or need to move the speakers? Maybe put differently how do I proceed from here?
Hi, to continue from my 1st reply.
As some have mentioned SPEAKER 'correction' is where it is at above 300-500hrz.
Just to point out, note that I have not said anything about not using PEQ above 300-500, rather I do not use 'room correction' above that frequency area. Above 300-500hrz I typically only correct the 'Speaker'. To do that you must have Klipple or Anechoic chamber measurements.(or at least high quality gated measurements)
('Correcting' the speaker can also include broad(low Q) tone control or wide band PEQ.)
Once the Anechoic/Klipple NFS data is available, then it takes some skill interpreting it all and making smart choices about 'correcting' the speaker's response. I do not use exactly the same stuff published by the very generous others that post here but it often is similar to what I use, this is because we are going to have different goals and more importantly different interpretations of what is 'best'.
You may not end up with an in-room curve that looks exactly like what you want.
But again since that is not what you are hearing then how would it help if it was perfect? A perfect looking room curve does not even mean the speaker sounds that good. ( I guarantee you I can make a perfect room curve that sounds horrible at least in terms of an example)There is some correlation between in room and actual sound but it really requires knowing the Anechoic/Klipple NFS data 1st.
The goal according to research that has actually been published, is not a perfect in room curve. Rather it is something else.
Assuming you have a typically furnished room, room treatments are always optional and can make things worse just as easily as better. It takes some knowledge and skill to do it well. I can't tell you what to do outright, it is a function of the speaker's design, the room acoustics+furnishings and personal listening tastes.
I think your basic in room response graph looks great FWIIW.
Bass generally should be elevated well above 'flat' (2-10db based on tastes) unless you like thin bass and or listen very loudly. Use the area around 150-350hrz to determine the baseline SPL. It will rise toward the bass and drop to some degree toward 20,000hrz.
If you playback at very high SPL and want a flatter sound the tuning will be different. This is because it takes 10db in the midrange for a change in volume to seem twice as loud, but in the bass it only takes 5-6db to seem twice as loud.
A +/-3db variation is for Anechoic/Klipple data. A real room might have much greater variation and still sound great and again see my 1st post at the bottom where I discussed what resolution I suggest to view the in-room steady state data in.
So, I am not sure what the sound is like from you view and if you are enjoying it or not.
Ultimately to answer you big ?, I would proceed by listening a lot.
Then in future if you make tweaks you can perceive they do sound better or not. Right now the charts are good enough. You likely need to get to know your systems and rooms' sound. We don't hear charts, as helpful as they are they simply get one close and then you do have to get into the subjective.
Free advice and worth every penny. To me the bass area looks OK for what you have to work with. I would try to reduce the peaks @ 2.3 Khz and 4.3 Khz as those can be very audible and unpleasant. It is not "pure" like only EQ below 500 Hz but it may help a lot and it is free and reversible to try.
One should not assume that.
Certainly play around but it is likely not that simple.
We do not hear room curves, at least according to Floyd Toole in his publishings and many others. (of course what does Dirac say? But they publish zero.)
The OP would want Anechoic/Klipple data , or at least some quality gated frequency response tests, to make best judgement calls above 300-500hrz.
Those peaks may or may not represent fixable issues and they may not actually sound the way they look based on the various components that made up that steady state measurement.
OP needs to know if they are more influenced by direct sound, early reflections, room characteristics or even measurement errors. The steady state also includes later arriving reflections but we typically are not influenced by them. The mic is though.
