Abstract: A coneless, no-moving-parts dynamic speaker has its internal components firmly locked within a plastic housing structure to prevent their movement relative to the housing, and may be secured to a wall of a room. During operation of the speaker, mechanical sound energy that it creates is transmitted through the walls and ceiling of the room to provide an expanded sound generation pattern. The internal components of the speaker include a voice coil internally anchored to a wall of the housing, an annular magnet member sandwiched between and fixedly secured to first and second annular metal washer members, and a metal alignment shaft having one end closely received in the core portion of the voice coil, and an opposite, radially enlarged end press-fitted into one of the washers and forming with the side surface of the central magnet member opening a reverberation chamber which is closely adjacent the voice coil but does not physically receive the coil.