Simple Explanation

A special kind of speaker that focuses and amplifies sound by using a horn—typically used for clear, loud mid or high frequencies.

Concise Technical Definition

A high-efficiency transducer that uses a diaphragm to produce sound which is then channeled into a horn throat, resulting in compressed sound waves that expand and amplify through the horn's flare, commonly used in PA and high-SPL systems.

Layman-Friendly Analogy

Like cupping your hands around your mouth when you shout—it makes your voice louder and more focused.

Industry Usage Summary

Widely used in professional audio systems, concert sound reinforcement, and high-output speaker designs. Their ability to project sound efficiently over long distances makes them ideal for large venues, stadiums, and auditoriums. Often found paired with waveguides or horns in PA speakers.

Engineering Shortcut

Compression driver + horn = higher SPL with lower power.

Full Technical Explanation

A compression driver is a type of loudspeaker driver, typically for mid to high frequencies, designed to operate in conjunction with a horn. The diaphragm of the driver vibrates and pushes air into a small throat that leads into the horn. This causes the sound wave to be "compressed" and then expanded through the horn’s flare. This design greatly improves acoustic coupling with the air, resulting in high sound pressure levels (SPL) and efficient long-distance projection with minimal distortion.