Keep in mind that the equalizer can't be accessed when streaming via Connect.
You can toggle it ON and OFF with the toggle called Equalizer.Scroll down until you see the Equalizer.Tap on your display name at the upper right corner of the app.If your device has a built-in equalizer, changes you apply also affect the sound of other apps. Not all Android devices will have this option present Now, you can select your preferred options You’re taken to your device’s Audio and Accessory settings.Here's how to adjust the Equalizer on Android if you have this option available: On Android devices you'll have the equalizer enabled within the Spotify Settings only if your devices' manufacturer has enabled you to access this feature. Tap a preset, or customize by dragging the dots on the equalizer.The equalizer can be accessed by default on all iOS devices. Here's how to access the Equalizer on iOS: Below you can see a screenshot from the equalizer in the iOS app including presets: It's recommended to use built-in equalizer presets. The same goes for other frequencies along the spectrum, from low to high.
This will increase the amount of bass you hear. This means that you are able to, for example, increase the lower frequencies. With an equalizer you are able to adjust the volume levels of various ranges in the audio spectrum.