Abstract: Speaker systems having simple structure, high output power, and desired directivity are disclosed. In one embodiment, a speaker system includes a first sound emission surface that emits a first sound in a first direction and a second sound emission surface that emits a second sound in a second direction that intersects with the first direction at a predetermined angle. The first and second sounds include at least sounds respectively generated from a common first signal source and different in phase from each other.

Abstract: An array speaker system includes a plurality of speaker units that respectively emit sounds in accordance with an input signal and an outer casing that supports the plurality of speaker units. Each speaker unit can be provided with a speaker operable to vibrate a vibrator in accordance with the signal, and a cavity back box that supports the speaker. The cavity back box forms a rear space with the vibrator on the opposite side with respect to the sound emission surface. The array speaker system thus constructed can emit a high power sound with a simple structure and improved stability in acoustic properties.