I have an former PS Audio P5 and all components except my amp are running off from. The P5 made a noticeable improvement in my system and our power lines are fairly clean. My amp runs off a Nordost QB4 II with QV2 and QK1. The Nordost has its own ground post, which I have running to a dedicated external earth ground rod which is not tied to the main house ground rods, besides being connected to Mother Earth which indeed they are. System is dead quiet and the noise floor is six feet under. I have not tried the Audioquest or newer Shunyata’s, but before the P5 had an older Hydra and the P5 was superior. Also using AQ receptacles and dedicated circuits and both devices I use make a difference.
Power regenerator vs conditioner
If the goal is to improve the sound quality (soundstage, detail, dynamics, etc) and the issue is "noisy" AC, it would seem to me that a power regenerator such as PS Audio P15 would be far superior to a "conditioner" such as a Shunyata Denali or Hydra or Triton. Is this correct? Thanks .