A sound diffuser includes a front plate defining a plurality of sound exit holes. An outer frustoconical wall extends from the front plate, the outer frustoconical wall decreasing in diameter from the front plate. An inner frustoconical wall extends from the outer frustoconical wall toward the front plate, the inner frustoconical wall decreasing in diameter toward the front plate and defining a sound entry opening spaced apart from the front plate. A plurality of legs are coupled to at least one of the front plate and the outer frustoconical wall, the legs extending away from the front plate to contact a speaker cover. First and second straps operatively extend from the front plate, the first strap having a distal end with a fastener for connection to a speaker case. The second strap also has a distal end with a fastener for connection to the speaker case.