In the audio industry, the 15 inch subwoofer speaker is practically a giant. Its diaphragm measures 15 inches (378mm), allowing the speaker to produce extremely low sounds, in the 20Hz to almost 200Hz range. This results in the movement of a significant amount of air which creates extremely powerful deep bass. It is often found in professional audio systems such as concert sound systems and high-end home theaters. In concert hall venues, it can reproduce thunderous drum beats and the audience can actually feel the music. In home theaters, it improves sound effects like explosions and powerful musical themes, providing excellent audio.