The Scosche HD4004A-WM1SD 4 inch HD speaker set has been designed to maximize the listening experience of your standard car audio or entertainment system with a clean signal which is lost with most factory speakers. They provide your vehicles system or satellite radio with a brilliant high-definition sound experience filled with powerful bass . smooth mids . and brilliant highs. The 4 inch woofer . 1.2 inch midrange . and 0.6 inch dual tweeters provide up to 120 watts of peak power and 30 watts of Rms per speaker for increased performance. The polypropylene cone is IMPP injection molded for enhanced durability and the rubber surround provides fast reacting low distortion musical reproduction. The oversized 6 oz strontium magnet provides the speakers with a strong . deep bass sound. They are CEA-2031 compliant with a 1 inch copper wound voice coil for high power handling with maximum output and reliability for amplifier upgrades to give you the freedom to customize your sound. Mounting hardware comes included in the box and the speaker design allows for a quick and easy install in either a 2 or 4-hole factory location. New