How to treat room mode?

[k900733]

Hey there!

My listening room with dimension 7.4m x 5.3m x 2.2m (24.28ft x 17.39ft x 7.22ft) has a +8db peak around 66 Hz. Very likely the room modes 0-2-0 & 3-0-0, as my listening position is at the middle of Left/Right and the latter 1/4 of Front/Rear.

I already have 10 GIK 244 traps on first reflection, 8 GIK tri-traps stacking at corners, and 3 diy 244 traps. Also two of Rythmik F12 subs sitting at mid of Front and Rear wall, xo at 40 Hz.

How can I alleviate the 66Hz peak due to room mode other than EQ? Would putting more traps help?
Also there is a peak around 88Hz from the Right speaker, which I have no idea what causes it. Any idea and how to treat it ?

Thanks!

 

[Purité Audio]

EQ, Roon, JRiver some dacs such as RME, use the EQ feature on REW to determine, frequency, gain, Q.
Keith

 

[k900733]

EQ, Roon, JRiver some dacs such as RME, use the EQ feature on REW to determine, frequency, gain, Q.
Keith

Thank you!

Yes I do use EQ filters generated by REW on the HQPlayer. I also want to learn if there is other way to do that than EQ.

 

[Purité Audio]

Massive amounts of passive absorption, membrane traps, helmholtz resonators, impedance traps such as PSI’s
Keith

 

[MRC01]

Eyeballing the overall response curve, I'd take a different approach: reduce the peaks at 66 and 90 Hz by a small amount, like only 3 dB, and lift the dip centered at 37 Hz. That dip looks like it's about 1.55:1 on each side (24 - 58 Hz) and 6-8 dB deep.