The HP129i is a 12inch, coaxial, hanging speaker with a surface-mount option and a proprietary BroadBeamHP® waveguide. Engineered to deliver true high-SPL performance, the HP129i incorporates a 12inch treated fiber cone and one 35mm (1.38in.) Mylar compression driver with a professional-grade electro-acoustic subassembly. The result is a pendant-mount speaker with maximum efficiency (97dB 1W/1M) and an extended frequency response from 73 Hz – 19kHz (-10dB). For lasting performance, the enclosure is made from injection-molded, glass-filled ABS. Developed specifically for true PA and sound reinforcement applications including arenas, stadiums, gyms, ice rinks, nightclubs and other open ceiling or outdoor applications where rapid installation, high-SPL and lasting durability are required.