Subwoofers Explained

A subwoofer looks like a large speaker.

Subwoofers are a very popular addition to both car audio and home theater systems. These special speakers are available in a wide range of sizes, prices and styles and will add an extra dimension to almost any stereo system. When upgrading a stereo system, subwoofers are an important component to consider.

What Is a Subwoofer?

A subwoofer is a type of speaker that only creates low frequency sounds. These speakers tend to be large, heavy and consume a large amount of power. Subwoofers are popular additions to car stereos as well as home theater systems. Subwoofers, like many other speakers, can greatly range in price and quality.

Sound Pressure Level

The sound pressure level, or SPL, is an important measurement to many audio enthusiasts. SPL is measured in decibels and refers to the volume output of a speaker. Large, high-quality subwoofers can have massive SPL outputs. Generally, sound output increases as the size and power requirements of the subwoofer increase.

Sound Quality

Sound quality is another term that is important to audio enthusiasts. The sound quality of a subwoofer is simply how clear and crisp its sound is. Larger and louder subwoofers tend to have poorer sound quality than smaller ones. Sound quality can also be reliant upon whether or not the amplifier that powers the subwoofer is an appropriate size and power output.

Subwoofer Enclosure

One vital accessory to subwoofers is a subwoofer enclosure. These enclosures not only maximize the performance and sound of a subwoofer, but they also hold it in place. Subwoofer enclosures, when used in a car audio system, are typically located in the trunk due to their size and weight. Home theater subwoofer enclosures are usually smaller and easier to find a place for.

Part of a Complete Stereo

While a subwoofer may complete a stereo, it should not be used in place of other speakers. A stereo with only a subwoofer would lack medium and high frequencies. The resulting sound would be deep, thumping bass. When installed with complementary speakers, a subwoofer will enhance the sound and add depth to the music.

References

• Crutchfield: Subwoofer Shopping Guide
• Crutchfield: Subwoofers Frequently Asked Questions
• Crutchfield: Subwoofers Glossary