| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker system of a low pass frequency characteristic suitable for reproduced software by making a resonance frequency variable. SOLUTION: A speaker unit 2 is attached to an upper half part of the front surface 1a of a box-shaped speaker cabinet 1, a first duct 4 for performing ventilation to the outside is provided at the lower half part of the same surface, and both the speaker unit and the first duct respectively project backward inside the speaker cabinet 1. Also, a second duct 5 for performing ventilation to the outside is provided at a lower half part of the rear surface 1b of the speaker cabinet 1 and projects forward inside the speaker cabinet 1. In addition, the rear surface 1b is provided with a shielding cover 6 for opening/closing the second duct 5. COPYRIGHT: (C)2005,JPO&NCIPI
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