Yes, these types of products hardly ever do any good for audio. Unless it is a power conditioner that is designed with audio use in mind, I don't bother with them and it is not for the lack of trying. The muddy bass and overall lean sound that lacks body and meat on the bones as well as making the upper end sound harsh and brittle is the pretty typical result. I have yet to come across one that does not have that effect. Stick to "audio grade" power conditioners, they can and do make a rather noticeable and appreciable difference in sound quality.