With an equalizer you are able to adjust the volume levels of various ranges in the audio spectrum. This means that you are able to, for example, increase the lower frequencies. This will increase the amount of bass you hear. The same goes for other frequencies along the spectrum, from low to high. It's recommended to use built-in equalizer presets. Below you can see a screenshot from the equalizer in the iOS app including presets:
The equalizer can be accessed by default on all iOS devices. Here's how to access the Equalizer on iOS:
Tap Equalizer, and switch it on
Tap a preset, or customize by dragging the dots on the equalizer
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. Here's how to adjust the Equalizer on Android if you have this option available:
Under Music Quality, tap Equalizer
You’re taken to your device’s Audio and Accessory settings. Now, you can select your preferred options (note that not all Android devices will have this option present).
The MacOS Spotify app or your Mac's System Preferences don't contain an Equalizer by default. For this, you'll need a third party app so in this case we recommend taking a look in the Mac App Store.
On Windows you'll need to find out if the Audio device you are using has an equalizer you can access. You might also need the most recent drivers for your Audio device. Keep in mind that not all Audio devices support an equalizer, but many do. The best thing to do is to reach out to the manufacturer of the Audio device as they will be able to tell you if you can use an equalizer.
Keep in mind that the equalizer can't be accessed when streaming via Connect. In this case we recommend finding out if the speaker/receiver you are streaming to, has a native equalizer built in the settings.
You can find more info about similar features like Audio Quality and Volume Normalization on our support page here.