Car Audio Speaker FeaturesWIDE Frequency Response - Covering a broad frequency range from deep lows to clear mid-bass, our subwoofers ensure you don t miss a single note.rubber Edge Cone - Superior flexibility allows the replacement subwoofer cone to move freely and accurately, resulting in precise and responsive bass performance.superior Build - Steel frame Endures high power levels and extended use. Better heat dissipation and maintain top-notch sound quality over time.easy Installation - Standard 8 inch size, easy to install in a car door, speaker holes, under seat. Perfect for replacing bad speakers or upgrading from low powered Oem ones.Subwoofer Specification:Type - WooferSize - 8 InchRMS - 50WMax - 100WPeak - 500WImpedance - 4OhmMagnet - 13 OzWoofer Frame - SteelVoice Coil - 0.81 InchVoice Coil Material - CCAWPackage Includes :4x Woofer