BOSS Audio Systems CH6930B Chaos Series 6 x 9 Inch Car Stereo Door Speakers - 400 Watts Max, 3 Way, Full Range Audio, Tweeters, Coaxial, Sold in Pairs Cone - Made from polyurethane, the CH6930B 6 x 9 inch car speakers provide a resilient and durable material that can offer great sound with the advantage of long lasting speakers Voice Coil - Our voice coils are able to withstand high temperatures yet maintain its strength and fatigue properties. This gives our speakers the advantage of longer play times with lower weights Surround - Rubber has the ability to endure much punishment without any sign of damage. It complements the whole structure of the speaker by allowing constant abuse where it is most needed, without the wear and tear Tweeter - A Piezoelectric tweeter is more resistant to overloads and can be used without a crossover due to its’ electrical property Basket - The stamped basket offers a strong and rigid platform allowing the listener to hear clean and clear music output