The R-Series speakers use Alpine’s exclusive high-strength, lightweight Carbon Fiber Reinforced Polymer (CFRP) cone technology. CFRP can be custom-formed so that its fibers align in the same direction as the curve and shape of the cone, thereby reducing resonant peaks and increasing the speakers’ mid-bass performance and dynamic range. CFRP is also used as a tweeter diaphragm, enabling the speakers to perform into the 45kHz range and making them compliant with High-Resolution Audio playback.
The R-Series speakers use a neodymium magnet which gives them a smaller mounting footprint, compared to other speaker brands. The R-Series speakers also use a new, shallower grill design. The result: An improved fitment design that lets the R-Series speakers fit into tighter install locations without sacrificing motor force.