B&W CWM650. System type: 2.0 system, Recommended usage: speaker set unit, Speaker placement: Floor, Tabletop/bookshelf. RMS rated power: 130 W, Frequency range: 45 - 30000 Hz, Impedance: 8 Ом. Amplifier output power: 130 W. Connectivity technology: Wired, Speaker interface type: Terminal. Housing material: Aluminium