You could try checking this out, it or may not help!
'Windows Start>Control Panel>Hardware and Sound>Manage Audio Devices'
- You should then see a Window displaying the Audio Devices installed on your system . Highlight the name of the current active Audio devices something like 'Speaker / Headphones' but may be referenced different depending the type of speaker system / drivers installed.
- Select 'Properties' which will display some additional options such as 'Level, Custom, Enhancements, Advnaced' for the various Audio functions available on your system. Try 'playing around' with some of those settings to see if it makes a difference.
- If that does not work you could try checking on your Computer manufacturers support website to see if there are any more recent Sound drivers available for system and if so, download and install to check if it offers increased sound performance.