Surge protectors without noise rejection


Is there such thing as a duplex outlet or power strip surge protector, that won't alter sound because of built in noise filtering with surge? Seems there is filtering with surge only protectors. Even Brickwall seems to have some sort of filtering...is this inherent with surge devices?
dejule
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Thanks everyone, are Zero Surge the same as Brickwall, the enclosures look the same...
Hi Bob, Surge X says that the SA1810 does have filtering...is this audiable? The site also says they ues chokes and inductors...wouldn't that compromize the sound?

Mooglie, Good to know about brickwall...that you don't hear any change in sound. Wounder if they also use inductors..?