Replacement POD Only, Dual 1" Concave Aluminum Drivers, Polystyrene Transducer Protector. When combined with the separate dome utilizes a patented Dual-Parabolic dispersion control technology that provides a targeted audio footprint with true stereo separation. The POD features twin 1 concave aluminum high-excursion drivers in individually sealed compartments for stereo or mono music and messaging. The ZeroReflection enclosure technology allows for accurate sound reproduction and the speaker offers a coverage angle of 30? for sharp focus. The transducers have a concave aluminum diaphragm with high-impact polystyrene transducer protectors. The single-point balanced mounting provides easy and clean-looking installations.