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As well, during the 1990s, DVDs were increasingly recorded with ' surround sound' processes that included a low-frequency effects (LFE) channel, which could be heard using the subwoofer in home theater systems. With the advent of the compact cassette and the compact disc in the 1980s, the reproduction of deep and loud bass was no longer limited by the ability of a phonograph record stylus to track a groove, and producers could add more low-frequency content to recordings. Subwoofers came into greater popular consciousness in the 1970s with the introduction of Sensurround in movies such as Earthquake, which produced loud low-frequency sounds through large subwoofers. The first home audio subwoofers were developed in the 1960s to add bass response to home stereo systems.

Active subwoofers include a built-in amplifier.

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Passive subwoofers have a subwoofer driver and enclosure and they are powered by an external amplifier. Subwoofer enclosures come in a variety of designs, including bass reflex (with a port or vent), using a subwoofer and one or more passive radiator speakers in the enclosure, acoustic suspension (sealed enclosure), infinite baffle, horn-loaded, tapped horn, transmission line, bandpass or isobaric designs, representing unique trade-offs with respect to efficiency, low-frequency range, cabinet size and cost. Subwoofers are made up of one or more woofers mounted in a loudspeaker enclosure-often made of wood-capable of withstanding air pressure while resisting deformation. While the term 'subwoofer' technically only refers to the speaker driver, in common parlance, the term often refers to a subwoofer driver mounted in a speaker enclosure (cabinet), often with a built-in amplifier. Subwoofers are never used alone, as they are intended to augment the low-frequency range of loudspeakers that cover the higher frequency bands.

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The typical frequency range for a subwoofer is about 20вЂ“200В Hz for consumer products, below 100В Hz for professional live sound, and below 80В Hz in THX-certified systems. A driver is commonly installed in an enclosure (often a wooden cabinet) to prevent the sound waves coming off the back of the driver diaphragm from canceling out the sound waves being generated from the front of the subwoofer.ДЄ subwoofer (or sub) is a loudspeaker designed to reproduce low-pitched audio frequencies known as bass and sub-bass, lower in frequency than those which can be (optimally) generated by a woofer. 12-inch (30В cm) subwoofer driver (loudspeaker).

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