KEF's Uni-Q driver enables the mid-range and tweeter to act as a single point source. This patented technology allows the listener to sit anywhere in the room and still enjoy KEF's world-renowned sound and clarity without having to be positioned in the narrow "sweet-spot" found with conventional speaker designs. The E Series also features KEF's Ultra-Thin Bezel (UTB) technology which offers the thinnest possible visible rim around the speaker assembly. The bezel and grill can be painted to match the interior décor.