product description : logitech z-cinema 2.1 speaker system includes : 2 satellite speakers, subwoofer, remote control power : 180 watts total rms connector : auxiliary input, headphone jack dimension (h x w x d) : speaker - 250 x 115 x 113 mm subwoofer - 292 x 291 x 414 mm sys req : intel pentium or equivalent processor; 256mb ram; 20mb of available hard disk space; usb port os : win xp media center edition or win vista home premium or ultimate; win media center required for complete remote functionality * srs trusurround hd * hybrid class d + class ab tri-amplifier * 2 x 2.54cm/ 1" textile dome tweeter; 2 x 7.62cm/ 3" ventilated midwoofer, 20.32cm/ 8" long-throw subwoofer * 24-bit usb digital audio * 180w advanced surround sound system * immersive surround sound without rear speakers * high-power, high-performance audio for a natural, balanced sound * incredible frequency response, detail and clarity * powerful, distortion-free bass * pure usb digital fidelity