Right-click on the default speakers, then select properties. There will be an enhancements tab in this properties window. Select it and you will find equalizer options.
Does Windows 10 have a built in equalizer?
Whether in Windows Mixer, Sound Settings, or Audio Options – Windows 10 itself doesn’t have an equalizer. However, this usually doesn’t mean that you have to compromise on sound adjustments for more or less bass and treble.
How do I get to the equalizer in Windows 10?
Settings > Devices > Bluetooth and other devices > Related settings > Sound settings > double-click on your default sound device ( mine is Speakers/Headphones – Realtek audio) > switch to the Enhancements tab > put a check mark in Equalizer, and you’ll see it.