1,000 watts maximum power; 500 watts RMS; 8 in. dual 4 ohm mobile subwoofer; 2.5 in. black-coated voice coil for higher thermal capacity; Heavy-duty industrial-strength aluminum cast frame; Black design patterned and treated semi-press pulped cone; Elevated motor structure cooling design; Oversized spider; Oversized polish black chrome finished terminals; Shorting ring for lower distortion; Polished bumped backplate; Mounting diameter: 7.13 in.; Mounting depth: 4.76 in.; Includes mounting screws; Each;