Summary: Diameter: 7 Inch; Sensitivity: 92 dB; Impedance: 4 Ohm; Frequency Response: 20-24, 000 Hz; Peak Power Handling (Watts): 180 Watts; Color: Black/White; RMS Power Handling: 92 Watts; Marine Grade Protection / IPX Rating: LIFE SHIELD - Tested to the highest marine and motorsports standards for protection against sun fade, fresh/salt water spray as well as dust and sand.; Tweeters: 1 inch pure Titanium dome tweeter for very smooth musical response, high output with minimal required amplifier power.; Cone Material: 8 inch Composite Poly Midrange: Water resistant composite polypropylene cone with temperature stable Butyl rubber surround mounted on a lightweight composite frame.; Surround / Cone C ...