Teufel Columa 300 Set S. Audio output channels: 5.1, Recommended usage: Home theatre. Satellite speaker type: 2-way, Satellite speaker frequency range: 140 - 22000 Hz, Satellite speaker crossover frequency: 150 Hz. Center speaker type: 2-way, Center speaker frequency range: 140 - 22000 Hz, Center speaker crossover frequency: 150 Hz. Subwoofer type: Active. Power source: AC