Bass booster Speaker

Bass booster Speaker is powerful sound effect application.

Compatible with lot of music player application.

You can adjust all controls in one screen.

Simple, small, free app to boost your speaker or headphone sound volume. Useful for movies, audio books and music.

This is not for adjusting the speakerphone volume in phone calls (that has its own boost, I think), but for adjusting the volume of music, movies and apps.