Features: 1.Superior Performance: Coaxial car speakers feature a superior, durable and innovative design that blends high volume speakers with high powered drivers. 2.Superior Heat Dissipation: Coaxial car speakers feature superior voice coils that can handle extreme heat and maintain their structural integrity for long life. 3.Upgraded Design: Car speakers have 91dB/W (1m) sensitivity and a 4 ohm impedance rating to compensate for the undersized wires in many of today's cars. 4.400W Power Output, Clear Sound: Car speakers have a maximum peak power output of 400W, so you can play your favorite tracks at will. Enjoy crisp, clear sound with reduced distortion. 5.Surround Stereo Sound: Car speakers with a frequency response of 30Hz?30,000Hz to complete your current car midrange speaker enclosure system for full stereo sound. specification:Item Type: Car Speakers Material: Magnet, Metal Iron Fixed Power: 100W x 2 Maximum Power: 400W x 2 Impedance: 4 Ohms Sensitivity: 91dB/W (1m) Frequency Range: 30Hz-30000Hz Application Range: for All Car Sound Systems PackageList: 2 x CarSpeakers 2 x Cable 2 x Speaker Panel 8 x Screws