Audiophilepure

https://www.stereophile.com/content/shunyata-research-everest-8000-power-conditioner

In a high-quality audio system, a reduction in noise can manifest in various ways, some of them indirect. Often, one notices an increase in inner detail and an improvement in precision. Perhaps a note’s decay extends further, or, as with two oboes playing together, the identity of the individual instruments can be heard through more of the decay. I expected much the same with the Shunyata system—and indeed that’s what I heard with the first few albums I played, all recordings of live, large-scale orchestral performances. Such recordings are inherently noisy, and yet I heard improvements of this kind.