Black Hydra HDC-2.25 6.5" 150W Max 2-Way 4-Ohm Component Speaker SystemBRAND NEW BLACK HYDRA HDC 2. 25 6. 5 inch 150 Watts Max 2 Way 4 Ohm Component Speaker System Key Features: The woofer cone is made of thermally dried pulp with a special impregnating composition, which reduces the resonance processes in its structure, due to the increase in internal losses. In combination with a surround made of styrene butadiene rubber, which has a low mechanical loss ratio, it helps minimize parasitic noise caused by resonant