Creative GigaWorks T40 Series II 2.0 Multimedia Speaker System with BasXPort Technology Refer the user manual below for troubleshooting BasXPort technology enhances the low frequency response without the bulkiness of a subwoofer. Convenient front access to volume, bass, treble and input jacks. Connects to your computer, MP3 player, LCD TV or other stereo audio sources. Comes with a power-saving feature that puts the speaker on standby when audio is not detected, and wakes it up automatically when audio is played. This item is non-returnable. Please refer the User Manual before use,