Features: 500 Watts RMS/1000 Watts Peak Dual 4 ohm Optimized for small ported enclosures Aluminum 1.75” voice coil former for superior heat dissipation High-temperature copper voice coil Double stitched surround Heavy-duty cast basket Spring-loaded terminals accept up to 8-gauge wire Stitched-on heavy-duty tinsel leads Solid pole with vent channels and aluminum shorting ring cap Rear gap-venting Top-Plate Cooling Channels Specifications: RE (Ohms): 6.6274 FS (Hz): 38.6925 VAS (L): 3.7701 Qes: 0.5005 Qms: 7.247 Qts: 0.4681 Le (mH): 5.5892 BL (NA): 20.0082 Mms (Grams): 124.3518 Cms (uM/N): 136.0613 Sens (dB @ 1w/1m): 78.1460 Xmax: 19mm Subwoofer Measurements: Displacement (Inches): 0.04 Depth (Inches): 5.71" Cutout (Inches): 5.94" Motor Diameter (Inches): 5.51 Ported Enclosure Specs: Ported Enclosure Size: 0.25 cu ft Recommended Port Area: 4-5 sq in Recommended Port Tuning: 35hz Sealed Enclosure Specs: Sealed Enclosure Size: 0.125 cu ft 4th Order Enclosure Specs: 4th Order Sealed Side: .09cu ft 4th Order Ported Side: 2.25cu ft 4th Order Port Area: 5.5sq in 4th Order Port Length: 6"