These units are loudspeakers with a 15-inch diameter woofer component, designed for use in professional audio applications requiring higher sound pressure levels and extended low-frequency response. They find typical application in live music reinforcement, DJ setups, and installed sound systems within performance venues. The 15-inch designation refers to the nominal diameter of the cone driver responsible for reproducing lower frequencies.
The utilization of these audio components offers significant advantages in scenarios demanding high-impact sound. Their larger driver surface area enables efficient air displacement, resulting in a more substantial bass response and greater overall loudness capabilities compared to smaller speaker sizes. Historically, their development stemmed from the need for robust and powerful audio reproduction in larger performance spaces, evolving alongside advancements in amplifier technology and materials science.