Steelseries Arena 9. Audio output channels: 5.1 channels, Recommended usage: PC/notebook, Product colour: Black. Satellite speaker type: 2-way, Satellite speaker frequency range: 35 - 20000 Hz, Satellite speaker sensitivity: 100 dB. Center speaker type: 2-way, Center speaker tweeter diameter: 1.91 cm (0.75"), Center speaker mid-range driver diameter: 6.98 cm (2.75"). Subwoofer type: Active subwoofer, Subwoofer driver diameter (imperial): 16.5 cm (6.5"). Power source: AC, AC input voltage: 100 - 240 V, AC input frequency: 50 - 60 Hz