Patent ID: 8194904

Claim:
A speaker system with broad directivity using a speaker unit having a cone type vibration plate with a front opening, the speaker system comprising: a first horn; a diffuser; and a plurality of high frequency speakers, wherein the first horn has a small-diameter opening and is disposed such that the small-diameter opening is positioned inward from the front opening of the cone type vibration plate and an outer surface of the first horn is arranged along an inner surface of the cone type vibration plate from the small-diameter opening to form a first acoustic path between the outer surface of the first horn and the inner surface of the cone type vibration plate, wherein the diffuser has a base portion, a front end portion opposite the base portion and an outer peripheral surface extending therebetween, and is disposed such that the base portion is positioned inward from a front opening of the first horn and opposite the small-diameter opening of the first horn, and the diffuser has a shape such that the outer peripheral surface of the diffuser expands along an inner surface of the first horn from the base portion to form a second acoustic path between the expanding outer peripheral surface of the diffuser and the inner surface of the first horn and such that the outer peripheral surface of the diffuser is then narrowed toward the front end portion of the diffuser so that a cross-sectional area of the diffuser narrows toward the front end portion of the diffuser, and wherein the plurality of high frequency speakers are accommodated in the outer peripheral surface of the diffuser which is obliquely cut around the front end of the diffuser such that the plurality of high frequency speakers are arranged radially around a central axis of the diffuser.