Car Subwoofers: 5 Fast Facts

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Fact #1. One of the very first subwoofer patents was filed as early as 1964 by a resident of California. Originally marketed under the name Octavium, the purpose for this patent was to provide a portable enclosure capable of reproducing low-frequency sound. The Octavium was popular through the mid-1970s and was even used by well-known musicians, including the Grateful Dead.
Fact #2. The 1980s saw the dawn of more customized car stereo systems. These included elaborate speaker and subwoofer setups with multiple configurations. The evolution from tape-based audio systems to the CD technology of the 1990s provided additional incentives for car owners to upgrade their vehicular audio setups.
Fact #3. A subwoofer is dedicated to the reproduction of low-pitched bass audio frequencies. This reproduction of sound is accomplished through the movement of air back and forth to create displacement. The device itself is usually housed inside a speaker enclosure made from wood or MDF materials.
Fact #4. Two basic types include passive and powered devices. As the most basic, the passive unit consists of a loudspeaker and enclosure connected to an external amplifier. It's small, with less of a dramatic bass effect than its powered counterpart. Setting the powered version apart is the integration of its amplifier within the speaker enclosure itself. This saves the driver precious interior car space.
Fact #5. Why would someone want or need such a high level of amplification for blasting music inside a car? Because a car's speakers are typically on the smaller side, they need a boost in order to produce the desired level of depth and omnidirectional resonance. Furthermore, these devices don't just amplify the bass. They also take the burden of doing so away from the vehicle's factory speakers. They would otherwise be forced to bear the load of all the low-pitched sound, with a risk of damage or blow out.