| 摘要 |
<p>Sounds of the lower audio frequencies can be reproduced efficiently and excellently. A cabinet (102) may house therein subwoofers (104L, 104R), each of which is made of Kelton-type speaker, at its left and right. Ducts (104d) of the subwoofers (104L, 104R) may be protruded from second air chambers (104c) to the outside, and ports (104e) which are tip end portions of the ducts may be provided at the front of the cabinet (102). Sounds of the lower audio frequencies from the subwoofers may be radiated from the ports (104e) to the outside. Therefore, standing waves can be prevented from being generated within the cabinet (102) due to acoustic waves, thereby avoiding a tone quality from being deteriorated. Also, since speakers for reproducing sounds of the middle and high audio frequencies disposed at the front of the cabinet (102) and the ports (104e) of the subwoofers may be flush with each other, amplification factors of audio signals by which the subwoofers may be driven need not be increased in order to balance sounds of the lower audio frequencies and sounds of the middle and high audio frequencies. <IMAGE></p> |
