TDK S150 Tremor 2.1 Computer Speakers (3-Speaker, Black) Three piece system: radical new Balanced Force Pipe Sub Bass System with two slim profile satellites Space saving Multi-Mount satellite flexibility enables desktop, wall, or monitor mounting Revolutionary NXT technology activates omni-directional sound for an immersive listening experience 150 watts, 75 watts RMS 50 Hz to 20 KHz frequency response