That was one of my concerns, between the solarium and marble flloors, and granite surround,its a LOT of smooth surface, but so far I can not notice it. Not saying there is not, but if there is, its not bothering me, with 1400 watts on the Outlaw 770 and the 600 watts on the EP600, I just turn up the volume and don't worry about any imperfections. <g>