The Impulse 8c is a two-way speaker system. The lightweight-yet-rugged molded enclosure is designed for install applications. These speakers work great for music playback or speech. These units work for 100v, 70v or standard 8 Ohm inputs. For 100v, 70v transformer operation there are selectable power levels. For 100v setting on the model 8C, there is a 30W, 20W, 10W, and 5W tap selection. On the model 5C, the taps are 15W, 10W, 7.5W, and 5W. Comes with steel wall mounting bracket.