Philips SPA7300 Multimedia Speaker 2.1, 2.1 channels, 30 W, Universal, Black, Silver, 60 W, Wired Philips SPA7300 Multimedia Speaker 2.1. Audio output channels: 2.1 channels, RMS rated power: 30 W, Recommended usage: Universal. Satellite speakers RMS power: 5 W. Subwoofer RMS power: 20 W, Subwoofer driver diameter (imperial): 15.2 cm (6"). Power source: AC, AC input voltage: 220 V, AC input frequency: 50 Hz. Connectivity technology: Wired, Line-in connectivity: 3.5 mm