Tantris
pfm Member
Its one of those things that 2 of us here have tried (both of us have 2 sets of 63s). Both up around a foot off the floor, arranged side by side, and in a curve so that both 63s are perpendicular to the listener. Much bigger impact and no penalty that we can detect. Similar in a lot of ways to stacking 57s, but horizontally rather than vertically. Both sets wired in parallel rather than series.
I’d like to hear that set-up!