Patent ID: 6796401
Filing Date: 2004-09-28
Classification: H04R

Abstract:
A speaker apparatus comprising:a speaker unit including a magnet, a frame and a diaphragm, said speaker unit electromechanically transducing an input low-frequency signal into oscillation to oscillate said diaphragm, and to generate and radiate sound waves from a front surface of said diaphragm; a speaker housing having a substantially cylindrical shape, said speaker housing having such a structure that said speaker unit is secured onto one end surface of said cylindrical shape of said speaker housing so as to substantially cover said speaker unit except for front and back surfaces of said diaphragm, and said speaker housing having an opening in another end surface of said cylindrical shape thereof; and a bar-shaped weight extending and having one end secured to a back surface of said magnet of said speaker unit, said bar-shaped weight holding itself in a substantially vertical direction and grounding said magnet acoustically and virtually, to attenuate and suppress oscillation transmitted from said magnet to said bar-shaped weight and to ensure high stability of said speaker unit free from said speaker housing, thereby preventing torsional oscillation of said speaker unit around an axial direction thereof by an inertia of a pendulum comprising said bar-shaped weight.