Let's all agree on one thing: you do not want to plug your stereo into your neighborhood grid. Your music can only sound as good as the power that drives it. Noisy and dirty power is found in every outlet and if you care about your music, you need to find a way to block that gunk from your music. There are a lot of thoughts on the subject, and methods to scrub that power but it still boils down to you dealing with the issue.
Power management unfortunately is also a complicated issue and prone to oversimplifications and bad advice. There is no one single perfect way to tackle this issue for your stereo, but there are a number of reliable paths and with the guidance of an experienced partner you can implement a solution that meets your needs and leaves you to do what you want to do: listen to music.
Started over 25 years ago by highly focused audiophiles and engineers, Audiences' goal was to offer products that pushed music reproduction to new heights. After the release of their now famous loudspeaker, it became clear to Audience that additional products needed to be designed to achieve their goal. Audience quickly recognized that better audio and power cables were needed due to inherent weaknesses found in other offerings. The world needed audio cables that were both well executed and eliminated the inherent "coloring" other cables introduced. This was followed up with the release of power conditioners that utilized a proprietary design and in-house components which took the listening experience to new levels. After many years in business, Audience still builds its products in the United States and continues to provide unmatched service to its large customer base.