Theater Solutions 4 channel speaker selector box is used in conjunction with your current home theater amp/receiver This selector box allows you to add up to 4 pairs of speakers, while providing protection to your amp/receiver. The easy push button design lets you activate each pair individually to customize the listening experience in your home. Installation could not be easier!! Simply connect the left and right outputs from your amp/receiver to the left and right inputs on the selector box, connect up to 4 pairs/8 speakers and you are ready to enjoy. This selector box also features a single pair impedance protection, soft rubber feet and Black steel housing. Great sound when used in conjunction with Theater Solutions in wall and in ceiling speakers.