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.