PURPOSE:To reproduce a low-pitched sound having both echoes and a satisfactory transient characteristics by providing resonance ducts for low-pitched sounds respectively on the front face of the loudspeaker box and any faces excepting for the front face. CONSTITUTION:A resonance duct 24 for front face low-pitched sound and a resonance duct 25 for rear face low-pitched sound are provided. The resonance duct 24 for front face low-pitched sound is constituted by integral molding with a front face cabinet 22, and the resonance duct 25 for rear face low-pitched sound is constituted by integral molding with a rear face cabinet 23. Then, direct sounds are generated from the resonance duct 24 for low-pitched sound provided on the front face, and indirect sounds are generated from the resonance duct 25 for low-pitched sound provided on the rear face. Thus, the low-pitched sound having both the echoes and the satisfactory transient characteristic can be reproduced.
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