American Bass XD 300W 6.5-inch High Performance Car Audio Subwoofer 4 ohms impedance; Handles 150W RMS, 300W Peak; 60 oz magnet. Ultra thick black powder coating deep bottom basket for strength and anti-resonance. NT multilayer foam surround for better stable linear excursion even at high power running. Stiff and rigid non-press paper cone with sunlight-pollution-moisture proof coating. Ultra-length voice coil for high excursion without distortion.