| 摘要 |
PURPOSE:To improve the sound of a speaker to be clear tone quality by providing plural woofers to oppose each other through a protrusion. CONSTITUTION:Holes 11 opening to a central room 2 from roomes B are formed at the bulkheads 9 and 10 of both end rooms 3 and 4 which opposes each other and the woofers 12 are respectively attached to these hole parts 11 with opposing their prouts against the other. At the central part of the central room 2, the protrusion 13 which protrudes forward from the rear wall 5 and gives sound wave from the woofers 12 forward the central room 2 is provided. By the speaker composed in the way, a in-phase component given from the plural woofers is increased and the sound of the woofer can be improved to be the clear tone quality.
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