Summary: Diameter: 8 Inch; Sensitivity: 92 dB; Impedance: 4 Ohm; Frequency Response: 20-24000 Hz; Peak Power Handling (Watts): 180 Watts; Color: Black; RMS Power Handling: 90 Watts; Marine Grade Protection / IPX Rating: Life Shield: Protectect for Water and Dirt. Uv Protected Against Sun Fade.; Tweeter Dome Material: 1 Inch Pure Titanium Compression Diaphram: Very Smooth Musical Response, With Very High Output With Minimal Required Amplifier Power; COMPRESSION HORN: Coincident Mounted Compression Horn Overall Volume is Improved as Much as 5db Over Conventional Speakers, Wavelength Transparent Acoustic Lens Improves Midrange Frequencies Through the Cone; Surround: Natural Butyl Rubber Remains Musical ...