Product Description Model No. SUB-10B SUB-12B Features 10" Subwoofer 12" Subwoofer Magnet Structure: Y30 50 oz Y30 50 oz Power Handling(Max): 600 Watts 800 Watts Voice Coil: 2" Kapton 2.0" Kapton Impedance: 4 Ohms 4 Ohms Free Space Resonance(Fs): 34 Hz 32 Hz Efficiency(1W/1M): 88 dB 90 dB Frequency Response: 30 Hz-2.2KHz 30Hz -1.8 KHz Best High End Car Subwoofer has been presented above, want more similar products, please click HIGH END SUBWOOFER, CAR AUDIO WOOFER.