In today's HI-FI fever coils, the subwoofer system with both "quality" and "quantity" has become the object of the "hard work" of audiophiles. The so-called subwoofer refers to the range that extends from below 40Hz to infrasound. When listening to music, it is almost felt by the human body surface, giving a shocking pleasure. This article refers to a bass replay mode developed by a Japanese company using Pascal's law, designed and tested the speaker system shown in this article, with a frequency response of 30 ~ 20000HZ and a sensitivity of 85DB.
The structure of the speaker is shown in Figure 9-48. The sealed box is adopted, and the tweeter is made in the same way as the general box. A slanted partition is placed in the woofer box, and a Pascal driver (speaker) is installed on the partition, which is driven by an independent low-frequency power amplifier.
Its working principle is shown in Figure 9-49, the signal IC1 and peripheral circuits
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