This 5-1/4” three-way speaker is a product of Pioneer’s experience in applying technology to music. Now you can apply this technology to your vehicle to enhance your music experience ! With long aramid fibers interlacing together inside, this IMPP cone design provides the strength and rigidity that powerful bass sound requires. High-density compressed internal architecture is resilient, stacks up against high power well and transfers sound quickly. The result is full-bodied, rich sound character with midrange depth that conventional IMPP cones cannot match.