A speaker system utilizes dipole speaker drivers in conjunction with monopole speaker drivers in a listening area to disperse a surround sound effect to a listener. The frame including overlying top and bottom sheets that are generally parallel and spaced apart in the erected condition of the frame by two webs which are spaced apart to extend in generally parallel realationship lengthwise along opposite side regions of the frame. A first part of the plurality of columns is selected in response to a first voltage applied to the selected word line. The eraser may have a surface hardness of 50 to 80, and also a sticking strength of 1. Methods of making and using these gel systems are also disclosed herein.