I've used Brick Wall products for years with no sonic degradation that I can detect. Here's a link to the one I use:
https://www.brickwall.com/collections/surge-protectors-home-theater-hdtv/products/eight-outlet-audio-surge-protector
https://www.brickwall.com/collections/surge-protectors-home-theater-hdtv/products/eight-outlet-audio-surge-protector