[. . . ] This guide is designed to make installing and using this product as easy as possible. [. . . ] 1 Connect to left and right Line inputs if using with a 2-channel hi-fi system. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference, including interference that may cause undesired operation. 2 Connect to the left (LFE/Sub) Line In socket if using an AV receiver or Amp with Sub out. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference, including interference that may cause undesired operation. 1 Your subwoofer can be placed almost anywhere in the room as bass sound is largely non-directional. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference, including interference that may cause undesired operation. [. . . ] 4 Auto feature will switch your subwoofer on and off automatically by signal detection. [. . . ]