Patent ID: 7711135

Claim:
A loudspeaker apparatus, in which a partition wall provided at a right angle to a center of a speaker that is installed on a front board of a cabinet divides an inside space of the cabinet into at least two to emit sound in middle and low frequency range from one of the divided space in the cabinet and to emit sound in middle and high frequency range from the other divided space in the cabinet, wherein a first opening is provided on a bottom surface side of said one of divided space in the cabinet and a second opening is provided on a rear board of the other divided space in the cabinet, and the front edge of the bottom board of the cabinet is tilted at a predetermined angle, wherein said first opening on the bottom surface of said cabinet is bored approximately right beneath said speaker and is trapezoid in shape, and the area of the trapezoid-shaped opening is selected to be 80% of the horizontal cross-sectional area of a diaphragm of the speaker.