Science-Inspired Design SpeakersIf you are looking to upgrade your driving experience with amazing audio Infinity Primus has you covered with their patented Plus One woofer cone and edge-driven dome technology. Infinity's sound signature brings you lifelike vocals crisp cymbals and well-defined bass. Plus their rich all-black color scheme seamlessly integrates into the car interior. Their radial starburst pattern is inspired by the icon of a supernova punctuated with the mirror-like copper mobius strip logo. There are 8 models for the family and all features a compact design for easy installation in any vehicle. Primus delivers great Infinity sound at a price that's hard to beat.Features•Plus One Woofer Cone Architecture•Edge-driven Silk Dome Tweeter•Engineered to Fitment and Easy Installation•Vented Basket Frame Design for Cooling•Competitively TunedPlus One Woofer Cone ArchitectureHarmans patented (US patent #7548631) Plus One cones provide more overall speaker cone area (up to 35%) than other cones in its class - the result is higher sensitivity (increase up to 2dB) increased low frequency output and greater musical character.Edge-driven Silk Dome TweeterInfinity Primus speakers are engineered with edge-driven silk dome tweeters which expand the high frequency range and ensure you'll hear all the natural detail of your favorite tunes.Engineered to Fitment and Easy InstallationInfinity Primus speakers feature a compact design for easy installation in tight spaces allowing them to fit into more vehicles without the need for modifications and cutting. Vented Basket Frame Design for CoolingThe super-rigid vented baskets help to cool the voice coils making for a reliable speaker. Not only do these look cool but they provide a real world benefit by wicking heat way from the motor structure almost like a fan as the cone moves through its stroke. The benefits are lower distortion at high output levels a longer lasting speaker and higher power handling.Competitively TunedInfinity Primus speakers are carefully tuned to ensure each line has the consistent Infinity sound signature.What's In The Box•Primus 503F 5.25 2 Way Car Speakers - Pair•(8) Screws•(8) Speed Clips•(2) 18AWG 200mm Length Pigtail Cable•Foam Gasket•(2) Brand Stickers•Owners ManualSpecifications•Woofer 5-1/4" polypropylene driver•Tweeter 1/2" silk dome•Power handling 40W RMS 120W peak•Sensitivity (2.83V@1m) 91dB•Frequency response (-6dB) 75Hz 20kHz•Nominal impedance 3.0 ohms•Crossover point 6kHz@6dB/octave