Teufel System 10 Ultra 2. Audio output channels: 5.1, Recommended usage: Home theatre. Satellite speaker type: 3-way, Satellite speaker frequency range: 80 - 22000 Hz, Satellite speaker crossover frequency: 2200 Hz. Front speaker type: 3-way, Front speakers RMS power: 130 W, Front speaker frequency range: 80 - 22000 Hz. Subwoofer type: Active, Subwoofer RMS power: 750 W, Subwoofer frequency range: 40 - 240 Hz. Power source: AC