I agree 100% with Hhiggins.
You will find that a parametric equalizer is ineffective above about 80Hz for standing waves room mode equalization.
A typical room of 25 feet by 16 feet by 9 feet will have a total of six room modes below 60 Hz. At 120 Hz this jumps to thirty five room modes (many sharp peaks and troughs in the frequency response and spatially too).
In practice it becomes impossible to do much parametric equalization above 60 HZ to tame bass standing wave modes.
Concentrate on acoustic broadband absorption and speaker placement for modal issues above 60 Hz.
I find that four GIK corner Tri-Traps offer a modest improvement in room response above 100 Hz (subtle clarity improvement in lower mid range vocals was just audible and sweetspot became noticeably larger). See my virtual system to get an idea of the aesthetics. Any less size/surface area of treatments and you are unlikely to make an audible change. I should probably do twice as much treatment to get my RT60's even lower, but, for aesthetic considerations, I stopped at four of these thick broadband absorbers.
You will find that a parametric equalizer is ineffective above about 80Hz for standing waves room mode equalization.
A typical room of 25 feet by 16 feet by 9 feet will have a total of six room modes below 60 Hz. At 120 Hz this jumps to thirty five room modes (many sharp peaks and troughs in the frequency response and spatially too).
In practice it becomes impossible to do much parametric equalization above 60 HZ to tame bass standing wave modes.
Concentrate on acoustic broadband absorption and speaker placement for modal issues above 60 Hz.
I find that four GIK corner Tri-Traps offer a modest improvement in room response above 100 Hz (subtle clarity improvement in lower mid range vocals was just audible and sweetspot became noticeably larger). See my virtual system to get an idea of the aesthetics. Any less size/surface area of treatments and you are unlikely to make an audible change. I should probably do twice as much treatment to get my RT60's even lower, but, for aesthetic considerations, I stopped at four of these thick broadband absorbers.