The Morel Maximo Ultra 602 Coax MKII is a 6.5-inch two-way coaxial speaker with a sensitivity of approximately 91dB and a wide-range reproduction of 55Hz to 20kHz. Designed to replace factory speakers, it offers "easy sound quality upgrades." The combination of a woofer with a high-rigidity paper composite cone and butyl rubber edge, and a soft dome tweeter produces a well-balanced sound with a rich mid-low range and clear, extended highs, elevating the sound inside your car to a higher level.