Specifications: 12" Dual 4 ohm IDQ V.4 Series Subwoofer Power Handling: Peak: 1500 watts RMS: 750 watts Recommended Power Range: 50-750 watts Mica-reinforced polypropylene cone woofer Parabolic roll surround Ability to custom match the basket color to your personal installation Conex spider with integrated tinsel leads Fiberglass composite basket High-temperature aluminum voice coil Proprietary voice coil attachment design Nominal Impedance (IMP): Dual 4 Ω DC Resistance (Re): 1.90 Ω Resonance Frequency (Fs): 30.47 Hz Equivalent Volume (Vas): 69.72 L Electrical Q Factor (Qes): 0.59 Mechanical Q Factor (Qms): 4.40 Total Q Factor (Qts): 0.52 Peak Excursion (Xmax): 28 mm Piston Area (Sd): 519.45 cm2 RMS Power: 750 W Sensitivity: 86.80 dB 1w/1m Box Recommendations: Sealed Enclosure Suggestion: 1 cu.ft. Ported Enclosure Suggestion: 1.5 cu.ft. Displacement: 0.10 cu.ft. Mounting Depth: 5.91 in Outside Diameter: 12.46 in Cutout: 10.87 in