| 摘要 |
PROBLEM TO BE SOLVED: To emit clear sounds without confining the sounds within a main body such as a musical instrument case, to increase the mechanical strength of a speaker box and to improve the acoustic effect against the vibration of a second speaker such as a high tone speaker. SOLUTION: A sound guiding duct 25 is provided in a speaker box 20 to guide the musical sound emitted from a high tone speaker 5 mounted on the side wall located on the front side of the box 20 in the direction which is different from the sound emitting direction of a main speaker 4. Therefore, the musical sound emitted from the high tone speaker 5 are not confined in a musical instrument case 1 and clear musical sounds are emitted to the outside of the case 1. Moreover, the walls of the box 20 are made of a double structure having inner and outer wall sections pinching a hollow section. Since the hollow section constituted by filling a filler, the mechanical strength of the box 20 is increased, the vibration of the box 20 caused by the high tone speaker 5 is reduced and the acoustic effect caused by the vibration is improved. |
