I have been thinking about buying a new power conditioner. During my research I found that the Shunyata Denali has vibration mats attached to the inside of the covers. There is a video on their website that talks about it. They probably wouldn't add them if they don't feel they were needed. Typically, adding damping to a chassis tends to smooth the highs a bit. Short story.....Many years ago I purchased a Kyocera CD player. After a few weeks of having it I opened it up to look inside. They had a big bar of steel bolted to the bottom of the chassis. I am pretty sure it was done to make it heavier, not for sound quality. It worked as it was heavier than the other one I was looking at...lol.