Summary: Diameter: 6.5 Inch; Sensitivity: 92 dB; Impedance: 4 Ohm; Frequency Response: 30-24000 Hz; Peak Power Handling (Watts): 150 Watts; Color: Black; RMS Power Handling: 75 Watts; Marine Grade Protection / IPX Rating: LIFE SHIELD Protected 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 ...