Have not had the III, but had the Powercell SE mkII and sold it. I had to try it, and wanted one for years before I finally got it... The differences it made to my system sound were subtle and hard to describe, maybe providing a little more accuracy to the music, but not the reality I was seeking. Based on my experience having owned an SR Tesla power cord and the Powercell II, my curiosity with SR is done. I came away with the feeling that the products were overpriced and over-hyped; at least in my system. I'd recommend that you don't spend the retail $5500 for sure. YMMV
Overall, I'd have to say that power conditioning and power regenerating devices I've used have all been disappointing and I ended up moving on from each one of them.
Overall, I'd have to say that power conditioning and power regenerating devices I've used have all been disappointing and I ended up moving on from each one of them.