Power regeneration - good idea? PS audio?

A long time ago I formed the opinion that a good power source has low impedance.  Such a power source should have low load regulation which should be desirable where the load is an audio amplifier. The PS15 claims a very low impedance for its amplifier supplying power to connected devices. In my system, the PS15 seemed to improve soundstage and dynamics.  My suggestion is to pay attention to the manufacturer's claimed output impedance when shopping for regenerators or conditioners.  I.E., look for a low number.  

@chungjh We have a P20 and customers running the P15. The P20 easily supports our smaller amps and the rest of the system. We've also worked with the Elgar power conditioners and have customers running those. Some of them are so large you can literally run the entire audio room circuit off of one conditioner.

Most conditioners IMO are glorified power strips. For them we generally recommend running our amps plugged directly into the wall.

@atmasphere I have Torus RM20 power conditioner, but I am not sure if P20 will lead to actual SQ improvement. I still hear a significant improvement in SQ late in the evening (with RM20). I am looking for conditioner/regenerator that will improve the day time sound to equal that of the night. I thought P20 was the answer until I read some mixed reviews on P20 on whether it is actually better than a good conditioner like Torus.

@chungjh I think you'll find that the P20 does a better job. The Tourus lacks active circuitry and if you look at their website you'll see that they don't have a spec for distortion on the output waveform.

FWIW, if you want to know if a given power conditioner will do you any good, just look at the distortion spec of the conditioned power. If you don't see one, that tells you that if there is distortion on the incoming power it will be there on the output as well.

A proper power conditioner will always have a distortion spec.

PSAudio specifies 0.5% for their P20.

I have the entry-level PS Audio P3 feeding my Class-D Rogue amp and my sources. I think it lowers noise floor and improves articulation. I listen to mostly acoustic and classical, so I find it worthwhile. Maybe not the most “bang for the buck” $1500 I ever spent, but I never considered returning it.