| 摘要 |
PURPOSE:To prevent the deterioration of a sound pressure and to improve a home position by mounting a speaker only for a low pitched sound on the side face of a cabinet, connecting, disposing and driving a speaker only for a high pitched sound in a reversed polarity to said speaker only for low pitched sound in a front face. CONSTITUTION:In the front face of the cabinet 8, the small speakers 4, 4' only for the high pitched sound are disposed. To the side face speakers 1, 1', a preventing coil 7 so as not to emit the high pitched sound is serially connected and the front face speakers 4, 4' are connected in the reversed polarity to the side face speakers 1, 1'. Accordingly, the output sound wave of the speakers 1, 1' for the low pitched sound is reflected on reflecting plates 2, 2' in cross over frequency areas in which both the sounds are added, so that a phase is inverted, however, they are driven in the reversed polarity to the speakers 4, 4' for the high pitched sound, so that it is heard as the same phase at the time of listening in the front face. Thereby, since the sound pressure is not lowered, but the high pitched sound is outputted from the front face speakers 4, 4', the home position feeling of a sound can be improved. |
