Depending on the audio drivers, you may or may not have a setting to change the Bass on the audio.
Open the old Control Panel, then set View at the top to large icons.
Open the Sound applet.
On the Playback tab, select your speakers, then click Properties.
Check in there if you have any Audio Enhancements settings and if so, disable any Bass Boost setting or disable all audio enhancements to test if that resolves the problem.
If not, check if the laptop manufacturer has installed any utility that allows you to change the bass/treble settings on the audio.