Harman/Kardon HKTS 30WQ/230. Audio output channels: 5.1, RMS rated power: 440 W, Recommended usage: Home theatre. Satellite speaker type: 2-way, Satellite speaker frequency range: 45 - 20000 Hz, Satellite speaker impedance: 8 Ом. Center speaker frequency range: 45 - 20000 Hz, Center speaker impedance: 8 Ом, Center speaker tweeter size: 19 mm (0.75 "). Subwoofer type: Active, Subwoofer RMS power: 200 W, Subwoofer frequency range: 45 - 20000 Hz. Power source: AC, AC input voltage: 100-240 V, AC input frequency: 50/60 Hz