The JBL PD544 is a professional, high-output horn-loaded full-range loudspeaker engineered for precise, long-throw sound reinforcement in demanding installed applications. Its design centers on a 15-inch low-frequency driver integrated with a high-frequency compression driver mounted on a constant-directivity horn. This configuration provides exceptional acoustic efficiency and controlled dispersion, enabling the system to deliver significant sound pressure levels with outstanding clarity over considerable distances. The defining feature of this model is its 40° by 40° square coverage pattern, which offers symmetrical, narrow dispersion. This focused pattern is ideal for applications where precise targeting of sound is required to minimize reflections and maximize intelligibility, such as in large reverberant spaces like cathedrals, auditoriums, performing arts centers, and transportation terminals where sound must be projected accurately to specific audience zones.

Performance is driven by the synergy between its large-format transducer and the focused horn. The 15-inch woofer delivers powerful low-frequency and mid-bass output, while the compression driver and horn handle the high frequencies with high efficiency and minimal distortion. The narrow, square coverage pattern ensures that acoustic energy is concentrated within a well-defined area, providing excellent speech articulation and musical detail at long distances while reducing energy spill onto walls, ceilings, and other reflective surfaces. As a passive system, the PD544 requires connection to an external amplifier and system processor. This allows for the use of external digital signal processing (DSP) to apply precise crossover points, equalization, and protective limiting, tailoring the speaker's performance to the specific acoustics of the venue and ensuring optimal integration within a larger, zoned audio system.

Constructed for permanent installation and long-term reliability, the enclosure is built from durable, void-free plywood with extensive internal bracing and finished with a rugged, textured coating. The cabinet includes multiple integrated rigging points compatible with professional flying hardware, allowing it to be flown in arrays or clusters for optimal audience coverage, or securely mounted on walls or structural supports. Its substantial build reflects its professional pedigree, requiring proper handling and installation. The JBL PD544 is engineered for audio consultants and system integrators who require a powerful, articulate loudspeaker with a narrow, controlled dispersion to deliver pristine, intelligible sound reinforcement for challenging, long-throw applications in large, acoustically complex environments.