Kam KT15 Active Subwoofer, The Kam KT15 sub is an active bass speaker with dual amplification to power a pair of satellite speakers with 700w peak power from the sub and 400w peak @ 8 ohms output. Incredibly strong in design, rear castors, reinforced grill, ingregal handles and pole mount, 2 x speakon type speaker outputs, earth lift and 60kg in weight.