A portable and waterproof audio reproduction device is provided, comprising a case having a base and a lid defining an internal volume, and further including a seal between the base and the lid sufficient to prevent water from entering the internal volume when the lid is closed onto the base. The case includes control electronics within the internal volume, wherein the control electronics are adapted to receive an audio signal from an audio device located either inside the case or outside the case. The case also includes a battery, electrically connected to the control electronics. Surface transducers are electrically connected to the control electronics and operatively attached to an internal surface of the case, wherein the surface transducers are capable of receiving the audio signal from the audio device and causing vibration of the internal surface in response to the audio signal.