Volume Booster Pro

Volume Booster - Raise the volume of your sound to prohibitive levels. This app is not an ordinary volume control, it amplifies your sound to the value exceeding usual maximum. According to the developer, you can exceed your maximum of 5 times, but there is one problem. At this volume the sound is likely to be bad, and in addition to this, you can damage your headphones or even hearing, so you should use it carefully.