Hmmmm,
what's the goal?
I've got a nearly new dual 31 band EQ I'm not using since I got my hearing aids. Live near me, Plainfield, NJ, 07062? Borrow it, find the frequencies that make a difference in your space, then re-define your quest.
btw, I start by using an SPL meter combined with test tones, then I refine for my preference.