Indoor and outdoor all-weather speaker with fully-sealed cabinet 70V White Metal-alloy MDT mid/bass speaker cone delivers naturalsound with ultra-low distortion Extremely stable long-lasting MDT cone structure High efficiency and power handling for optimum performance Dual-layer voice coil with separate inner and outer windings for high output with ultra-low distortion MLS fluid voice coil suspension replaces distortion-causing mechanical spider Compound rubber surrounds resist UV rays and salt spray Gold-plated rust-proof connectors High-density injection-molded cabinet resists chipping and scratching Low-resonance cabinet structure Easy-to-grasp multi-faceted mounting brackets with 180o swivel Easy to grip oversized mounting knobs Brackets mount with knobs attached for easier and safer installation in hard-to-reach locations Heavy-gauge aluminum bracket Corrosion-resistant driver frame & mounting hardware Attractive styling with Armadillo ridges for stiffness Coaxial speaker system