The experts assert that the speakers have wide frequency ranges which allow them to place TS-D6902R and TS-D1602R on par with the best car audio solutions on the market.
Pioneer D series is not the only one that contains basalt fiber in the cone. Mid-market E series uses a polypropylene matrix composite reinforced with Aramid/Basalt fiber. The combination of aramid stiffness with temperature stability and viscosity of melted basalt provide unique features for the speaker.
The search for new materials and technical solutions is a necessary condition to achieve “Smooth and Open” sound quality that the Pioneer designers strive to provide for the owners of Pioneer speakers.