Giving 5oo€ for a audiophile power conditioner sounds crazy but depending on the tech inside it might actually help prolong the lifetime of your Hi-Fi gear. Yes, I actually wrote that and I’m not joking.
Archimago’s blog has a great objective test and review about a power conditioner from a very reputable brand called Belkin.
Belkin unlike some audiophile brands actually has some pretty amazing engineering behind their surge protectors and power conditioners.

Sadly its not always the case with audiophile brands, often selling their so called filters and cheap surge protectors inside glamorized power strips.
Anyone with a little knowledge about electricity will notice the ripoff on the components and so called tech. I had the sad vision of a so called power conditioner selling for 5oo€ that had a very minimalist construction, so minimal that my Lidl brand surge protector power strip might have more engineering inside.

Audiophiles will buy that kind of gear and expect better sound because the power line is being filtered, but the gear in question is so basic any DIY enthusiast can actually build something similar from way less money and do a better job at filtering and surge protection. I won’t point fingers at bad brands because I don’t want any legal problems but I advise anyone who really needs a solid power conditioner to search for reputable brands like Belkin or APC.

I also advise anyone who doesn’t have a surge protector to buy one for their sensitive gear, I might actually save the day, specially during thunderstorms.