An amplifying cover for an audio device that enhances the audio output of the device, such as voice or music, louder and clearer, without adding to the bulk of the device. The cover redirects the audio output of the device to a different location that enhances the ergonomics of the device. The amplifying cover can redirect the sound (while also amplifying it) to the top of the device, closer to the user's ear, or to the side of the device. The amplifying cover can redirect the sound to a plurality of different directions, making it easier to make conference calls. The cover is a protective case for an electronic device that also amplifies the sound produced by the electronic device. The cover provides a portable and compact acoustic amplifier for an electronic device that can be permanently or semi-permanently attached to the electronic device.