Boston Acoustics Voyager 50 Black Outdoor Speakers Specially voiced for open-air environments Kortec dome tweeter for crystalline high-frequency sound and Deep Channel Design for more bass from less amplifier power Heavy-duty, aluminum C-brackets and wedge shape make mounting easy and aesthetically pleasing Waterproof design built to IEC 60529 IPX5 standards. Rustproof hardware and connectors, powder-coated aluminum grilles and UV-resistant polypropylene cabinets to withstand the harshest weather and temperature extremes Internal mounts for standard 70V/100V matching transformers for commercial applications