[Wayne A. Pflughaupt]

But you’ll still have the phase issues Chris spoke of, unless all of them are equidistant to the seating position. This will show up as ragged, saw-tooth response, and since it is a time-alignment issue, you’ll get different results at every listening position. You might note that Mr. Welti stated in the quote field from your initial post that four subs “aren’t practical in most rooms.”

It also should be noted that experience in sub placement like the ones evaluated in that white paper are relevant only in the room they’re performed in. Unless your room is identical, or at least pretty close, your results will be different.

Regards,
Wayne