Why not try these stacked, where the lines are parallel, then at right angles.
Hear a difference?
For me, the best use is on top of electronics, IECs.
I use them inside my power amp, on the rail cross member near
the transformer. Tame the micro vibrations, hear the difference.
Try these for yourself... what component(s) would you have to upgrade,
in order to achieve the same results, and at what cost?
My answer: these squares operate on a different level.
I am thinking the positive effects may be more apparent
on high quality components, for example, on the glass top
of my Powercell UEF 12 power conditioner!