- Indoor and outdoor all-weather speaker with fully-sealed cabinet- 70V- Black- 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 s