Summary: Diameter: 6.5 Inch; Sensitivity: 92 dB; Impedance: 4 Ohm; Frequency Response: 38-22000 Hz; Peak Power Handling (Watts): 300 Watts; Color: Black; RMS Power Handling: 75 Watts; Marine Tested: Rockford Fosgate uses industry standard tests (ASTM B117 salt/fog and ASTM G154 UV) to ensure the M1-65B speakers are durable in the difficult marine environment.; Tweeters: The 1" balanced dome tweeters are made of LCP (liquid crystal polymer), a high strength/light weight material. The tweeters are bridge mounted, useful in a marine speaker because no opening through the middle of the woofer for the mounting post is needed.; Speaker Terminals: In addition to standard male quick slide terminals, each sp ...