IDQ10 V.4 D2 - Image Dynamics 10" 1000W Peak Dual 2-Ohm IDQ V.4 Series Subwoofer 10" Dual 2 ohm IDQ V.4 Series Subwoofer | 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 | New V4 Metal Basket | High-temperature aluminum voice coil | Proprietary voice coil attachment design Power Handling: Peak: 1000 watts | RMS: 500 watts | Recommended Power Range: 50-500 watts Nominal Impedance (IMP): Dual 2  | DC Resistance (Re): 1.85  | Resonance Frequency (Fs): 31.77 Hz | Equivalent Volume (Vas): 44.71 L | Electrical Q Factor (Qes): 0.79 | Mechanical Q Factor (Qms): 2.90 | Total Q Factor (Qts): 0.62 | Peak Excursion (Xmax): 28 mm | Piston Area (Sd): 383.58 cm2 | Sensitivity: 84.50 dB 1w/1m Sealed Enclosure Suggestion: 1.1 cu.ft. | Ported Enclosure Suggestion: 1.45 cu.ft. | Displacement: 0.07 cu.ft. | Mounting Depth: 5.81 in | Outside Diameter: 11.04 in | Cutout: 9.57 in