JBL Control HST Wide-Coverage On-Wall Loudspeaker (Black)The Control HST utilizes JBL's patent pending Hemispherical Soundfield Technology to achieve extremely wide coverage of the listening space along with eliminating the primary wall reflection that tends to cause inconsistent sound when speakers are attached to a wall. The wide hemispherical soundfield covers from wall to wall, allowing a single speaker to provide high fidelity full range sound to a large listening area. This can reduce the number of