Using “trickle-down” technology, inspired design, and performance cues from the Ultra-High-Resolution AlpineF#1Status systems, the Next-Generation R-Series Alpine Speakers are Hi-Res Audio Certified and able to reproduce up to 40kHz frequency response. This ultra-wide bandwidth brings music even closer to the original source while the classic R-Series design maintains the “loud and fun” performance quality that consumers have come to enjoy. Alpine's exclusive High Amplitude Multi-Roll (HAMR) surround technology which maintains linearity for more accurate music reproduction. Magnesium, hard-dome tweeters contribute to the signature sound and have a swivel-mount design for optimal listening positioning and threaded removable housing for application flexibility. The next generation R-Series speaker line offers two options for performance: the "Pro" and "Standard" models. The R2-S65C is a standard component speaker set that includes a 6.5" Mid-Range and 1" Tweeter with a flexible in-line crossover network that simplifies installation.