- To lay the speaker cables our 5.1 / 7.1 surround sound system - Even my wife can live with that! - With self-adhesive film and hinged lid very stable installation. The lid does not fly around in the area! - The installation area must be dust and grease free! - Laying in a cable duct 4 channels 1.5mm2 speaker cable to the rear - The smaller variant 4.5 x 9mm and the front of the viewing area to the front satellites - On white walls routed optimally - Very cheap - Fully satisfied