Beta. Be621 1" and 6-1/2" (165mm) 2-way component speaker system Opening a window to an intensely pure audio experience. The Infinity BeTA Be621 Component Speaker System leverages Infinity's decades of audio expertise and use of advanced materials to deliver a perfect audio performance. No expense was spared throughout the systems architecture. A 6-1/2" supremo Carbon Fiber cone was developed to ensure low distortion and optimium cone rigidity even at high output levels. It is supsended using a high roll rubber surround which is both durable and provides the ulitmate in cone edge suspension and Specially formulated acoustic adhesive chosen to provide stronger strength and sound quality. For high frequencies Infinity chose Beryllium due to its incredible stiffness and high damping properties. The result is a tweeter with resolution clear out to 40kHz, which guarantees incredible accuracy free from harshness and unwanted acoustic anomolies. The crossover network developed for the Infinity BeTA Be621 uses ultra high tolerence components to eliminate coloration, so that the mid-woofer and tweeter are able to be fully appreciated by the listener. The Infinity BeTA Be621 will deliver a level of listening that can only be delivered by Infinity. Specifications: 6-1/2" (165mm) 2-way car component speaker system 1" Beryllium dome tweeter 6.5" Carbon fiber cone with cast frames Bi-Amp Capable Precision Outboard Crossover network Frequency Response (-6dB): 20Hz – 40kHz Power Handling: 100Wrms, 200W peak Crossover Frequencies: 2.5K or 3.5kHz (selectable) Nominal Impedance: 4 ohms Sensitivity: 90dB (2.83V @1M) Woofer mounting depth: 2.83 in./72mm Tweeter flush mounting depth: 0.77 in./19.5mm *By request/order.