The unique angled top allows the CSiA6 to be inverted so you can place the speaker below your TV and still enjoy great sound. A unique kickstand assembly that provides rear support to many projection TVs (will not work with plasmas or other TVs with completely flat rears). The proprietary curved, 6-layer DAHLI enclosure design creates the optimal shear damping for a more rigid, acoustically inert enclosure and minimal cabinet resonances. CSiA6 cabinets are designed for clean, accurate sound. Klippel motor optimization uses laser measurement technology to ensure a smooth excursion path at either end of the volume spectrum for uniform performance at both low and high volumes. Polk's proprietary, patented Dynamic Balance technology allows our engineers to design out distortion-causing driver and system resonances, so you only hear the good sounds.