I may end up eventually trying the mini dsp 2x4 or the dspeaker antimode 8033. I do have ringing in my room at 25hz and modest ringing at its harmonic at 50hz. These are length modes and affect the entire width of the listening area fairly evenly. Part of why the 8033 is appealing to me is it is a black box standalone solution. No licenses, computer hookups or time pouring over graphs and making adjustments. There just comes a point where analysis paralysis starts to set in. smile

A couple people here have the 8033, thoughts?