A waterproof acoustic chamber that is adapted to hold and protect a smartphone is disclosed. The chamber includes a body portion that is configured to encapsulate a smartphone, which exhibits an internal dimension that accommodates, at a user's option, a smartphone with (or without) its own protective casing. The body portion is configured to prevent water from entering an internal area of the body portion when exposed to water. The body portion includes at least one speaker area that includes a material through which audio content that is generated by the smartphone may leave the body portion. The chamber further includes a compartment having an open side that is configured to receive and attach to the backside of the body portion. The compartment includes two sides that each extend beyond a parallel side of the body portion, with the speaker area and compartment being effective to amplify and channel the audio content that is generated by the smartphone.