The best way to increase the low frequencies of the Android Equalizer is to use the BASS BOOSTER PRO app. It is a native application which will allow you to increase the bass level of your Android device. This application works with your Android device's built-in speaker or any device which has a built-in microphone. It is a very easy-to-use application and you will not need to make any configuration.

If you are using a device with Android OS 11 or higher, you will need to enable the microphone in the settings.

Bass Booster Pro is a standalone app, please uninstall the free version to avoid conflicts.