| 摘要 |
The invention relates to loud-speaker enclosures comprising a sealed box with several loud-speakers. More particularly, the invention relates to a sealed box enclosure comprising an amplifier and in which the loud-speakers form two groups which, connected in series, constitute the first two arms of a bridge circuit. The other two arms of said bridge circuit form a voltage divider. A negative feedback loop is connected to the node of the first two arms while a positive feedback loop is connected to the node of the other two arms.
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