What Is a Passive Subwoofer?

Subwoofers are generally divided into active subwoofers and passive subwoofers.

Passive subwoofer

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Subwoofers are generally divided into active subwoofers and passive subwoofers.
The active subwoofer has a power amplifier, while the passive subwoofer does not have a power amplifier. There is only one speaker unit and crossover. Passive subwoofers must be powered by amplifiers. And generally need to add a low-pass filter is better. It is also possible to drive directly with an amplifier, but the signal selection and volume control are not on it. Passive subwoofers, like passive speakers, have no integrated circuits or power transformers. Compared to the active subwoofer, the low-frequency signal output of the passive subwoofer is stronger, the musical expression is better, and the price is slightly higher than the active subwoofer.

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