Features: 5-1/4 Inch 2-way Speakers (Marine Certified) Power Handling: Peak: 275 watts per pair / 135 watts each RMS: 90 watts per pair / 45 watts each Impedance: 4 ohms Dynamic Balance polymer/mica composite mineral filled cone is stiff yet lightweight for big sound and little distortion 19mm liquid-cooled silk/polymer composite dome tweeter with neodymium magnet for clear and detailed highs Low-mass 2-Layer 25mm Kapton voice coil former is lightweight for high sound output Multi-hole mounting pattern and shallow depth for easy drop-in installations in most cars ABS Grilles, computer optimized and based on exclusive MOMO designs Durable butyl rubber surround won’t fall apart under the stress of extreme temperatures, sunlight or time Pole Plate Heat Sink promotes better heat dissipation for superior power handling and reliability Acoustically inert stamped steel basket Flat Spider for faster, longer excursion linear motion Flexible woven tinsel leads sewn directly into Spider for greater reliability Frequency Response: 60-22,000 Hz Specifications: Series: db (Polk) Priced Per: Pair Speaker Size: 5-1/4 Inch Design: 2-way Tweeter Design: Dome Tweeter Composition: Silk Woofer Composition: Polymer/Mica Composite Woofer Surround: Butyl Rubber Peak Power Handling: 135 watts RMS Power Handling: 45 watts Sensitivity: 93 dB Frequency Response: 60 - 22000 Hz Impedance (Per Voice Coil): 4 ohms Shallow Mount Installation: Yes Top-Mount Depth: 2-5/16 Inch Bottom-Mount Depth: 2-7/16 Inch Cutout Dimensions: 4-11/16 x 4-11/16 Speaker Grilles: Yes