Teufel Cinebar 21 XL. Audio output channels: 2.1, Recommended usage: Home theatre. Satellite speaker type: 2-way, Satellite speaker tweeter size: 20.3 mm (0.8 "), Satellite speaker mid-range driver size: 80 mm (3.15 "). Subwoofer type: active, Subwoofer driver size: 200.7 mm (7.9 "). Power source: AC, AC input voltage: 230 V, AC input frequency: 50 Hz. Satellite speaker dimensions (WxDxH): 918.5 x 113.3 x 115.3 mm, Satellite speaker weight: 7.6 kg, Subwoofer dimensions (WxDxH): 280 x 280 x 465 mm