Specs - Impedance: 4 Ohms, Frequency: 85 Hz to 23.8 kHz, Sensitivity: 89 dB, Mounting Depth: 1-3/4”, Mounting hole – 4-15/16”, Grills included, Template and Specs on Package CONE - Carbon Mica Woofer. Carbon Mica combines two minerals and is lightweight yet extremely durable. Smooth sound with low frequencies and refreshing accuracy. SURROUND - The JVC Hybrid design for the woofer surround combines the lightweight material of cloth with the reliability and strength of rubber. The result: an extremely efficient speaker with lasting durability in the harsh environment of a car. FACTORY FIT - Upgrade your factory speakers. The Woofers are a perfect fit in OEM situations and the tweeters mounted higher in your car will give you incredible detail and separation TWEETER - 1" balanced dome polyetherimide (PEI) tweeter giving vocals, guitar, horns and other height notes new life. The neodymium Tweeter features excellent detail and high power handling POWERFUL SOUND: These JVC Speakers produce incredible sound. 300 watts of peak power, ensure they'll sound great with any car radio or paired up with an Amplifier