Boss OHC63 6.5" 3-Way Die Cast Frame Speaker The diecast aluminum frames will make a high end statement in your system. The metallic electroplate injection cones provide durability and superior sound quality. POWER HANDLING, PEAK 450 Watts; MAGNET STRUCTURE, 35 OZ IMPEDANCE, 4 OHM; FREQUENCY RESPONSE, 65Hz20kHz; SPL 1 WATT/1 METER 94 dB CONE MATERIAL, ELECTROPLATE INJECTION VOICE COIL, 1-Inch ALUMINUM; TWEETER, 1/2-Inch PIEZO; MIDRANGE, 3/4-Inch POLYIMIDE DOME