Boston Acoustics BA7500RUS Digital 5.1 Computer Speaker System (White) SST technology delivers outstanding sound from speakers one-inch thick Includes a 6.5-inch bandpass subwoofer for enhanced lows Employs Dolby Digital Surround processing for movie audio from your PC DVD-ROM Experience multichannel PC gaming with a 4-channel soundcard Easy, front mounted controls: master, surround, and subwoofer volume and surround balance