I have acquired a Powerstation and three SupaNova cables.
The best-sounding setup I've found in my system is to connect the Powerstation with a regular passive cable to the outlet and then connect my equipment to the Powerstation with SupaNova cables, OR to connect the Powerstation to the outlet with a SupaNova cable and connect my equipment to the Powerstation with regular passive cables. Either of these combinations results in powerful bass, impactful transients, and a black background to the music. This arrangement is more forgiving of poorly-recorded music.
When I try to stack the cables by connecting the Powerstation to the outlet with a SupaNova and connecting my equipment to the Powerstation with SupaNova cables, the sound becomes crystal clear with a black background but also very analytical and technical. It's like having a thousand individual speakers tuned to different parts of the music, where I can hear everything in the recording, but the music is so up-front that I don't enjoy the music as a whole. This arrangement is not forgiving of poorly-recorded music.
That's been my experience so far.