BOSS Audio CH4620 Car Speakers - 200 Watts Of Power Per Pair And 100 Watts Each, 4 x 6 Inch, Full Range, 2 Way, Sold in Pairs, Easy Mounting CONE: Made From Polyurethane, The CH4620 4 x 6 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 Giving Them The Advantage Of Longer Play Times With Lower Weights SURROUND: We Use Rubber In A Lot Of Our Speakers. It Has The Ability To Endure Much Punishment Without Any Sign Of Damage. It Compliments 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. WARRANTY: BOSS Audio Systems Provides a Powerful 3 Year Platinum Online Dealer Warranty So Long As The Purchase Is Made Through Amazon Dot Com