Audiophilepure

https://hometheaterhifi.com/reviews/audio-accessory/power-conditioner/clarus-concerto-power-conditioner-review/

“The point I want to make here is that high-end audio equipment will likely not have a lot of noise peaks because they already have noise-reducing circuitry. However, they may very well have some high-frequency noise that makes its way into the signal. The origin of this high-frequency noise is not known. It could be coming from anywhere in your home, including appliances, Wi-Fi router, etc. Everything these days seems to have Wi-Fi capability, so this noise can be in the megahertz range.

Removing high-frequency noise is a matter of your own priorities. If you want to maintain the purest signal possible, then adding a high-quality power conditioner is desirable. The Clarus Concerto is certainly of that category.”

https://www.audioholics.com/news/bose-to-close-half-of-their-stores-worldwide

“Bose Corporation, a leading manufacturer of headphones and other audio equipment announced that they will be closing HALF of their retail stores worldwide due to a dramatic increase in online purchases. Although founded in Massachusetts in 1964 by Amar Bose, the first retail store was opened in 1993 in Kittery Maine.  Bose was founded on creating speaker systems which used multiple drivers aimed at the surrounding walls to reflect the sound to replicate the sound of a concert hall, it has diversified its products to include smaller portable speakers, earbuds, and the highly promoted and profitable sports, military, and consumer based sound cancelling over the ear headphones.”