First check your wires and make sure they're away from electrical power line. Lower your base and trebel. if you turn the volume down and if the issue still there, maybe you have a damage software or hardware. try reinstalling the drivers and codec. If the hardware is the problem then you may borrow a sound card to test before buying one it maybe just the speaker that can handle your settings. or maybe you just have a lose wiring. Make sure you speakers are not damage, test it with an portable MP3 player or something.