Great results with a single Super Sleeve!
I "stretched " a 3.25" copper sleeve so that it became
oval. It could now encircle both plugs on a single
wall outlet.
One plug on a dedicated line (SR black outlet) contains the cord
to a SR Powercell 12 and a High Fidelity 0.5 magnetic wave guide.
I used 3 small cork rectangles: one in between the plugs
and the others between the plugs and the body of
the sleeve (top and bottom). There is an additional sleeve over the SR cord, that is easily fitting inside the Super Sleeve.
I recently treated the wires of the outlet with Total Contact,
and applied it to the face of the outlet, and the outlet cover.
I am hearing a more relaxed, natural presentation
of music, with no fatigue. Highly recommended.