Philips Multimedia Speaker 2.1 SPA9300/17, 2.1 channels, 50 W, Universal, Black, Silver, 100 W, 78.7" (2 m) Philips Multimedia Speaker 2.1 SPA9300/17. Audio output channels: 2.1 channels, RMS rated power: 50 W, Recommended usage: Universal. Subwoofer driver diameter (imperial): 8". Power source: AC, AC input voltage: 220 V, AC input frequency: 50 Hz. Connectivity technology: Wired, Line-in connectivity: 3.5 mm. Master (outer) case weight: 39.5 lbs (17.9 kg)