Quality sound should never be compromised, especially when music is your way of life. Right from gold plated screw terminals to a rigid, light non-pressed paper cone for punchy, powerful sound, we have used quality components to ensure the sound of your choice. Pioneer carefully selects materials and applies a non-pressed paper process-giving these new cones the light, rigid qualities needed to create punchy, powerful sound. plus extra durability to go to the limit. New Pl (Polyimide) cone has great characteristics of rigidity and durability that help to reduce harshness and enhance clarity of sound. New dual layer minimizes unnecessary cone resonance for higher cone durability and clearer sound. More magnetic field increases power output and optimizes heat dissipation.