Summary: Diameter: 7.7 Inch; Sensitivity: 91 dB; Impedance: 4 Ohm; Frequency Response: 45-25000 Hz; Peak Power Handling (Watts): 250 Watts; Color: Gunmetal; RMS Power Handling: 100 Watts; Marine Tested: JL Audio's marine speakers are tested in ultraviolet chambers to simulate years of sun exposure, and salt fog chambers to simulate years of exposure to salt-water environments.; DMA (Dynamic Motor Analysis): DMA is JL Audio's proprietary method of improving dynamic motor behavior. The DMA-optimized long-excursion design enhances output, bass extension and power handling of the speaker.; Polymer Basket And Grille: The baskets and grilles are UV-resistant polymer. The baskets encapsulate the ...