The NEO is a subwoofer built for SPL!! It comes stock with the AR cone and surround .5 stiff spiders and an 8 layer 3" high temp voice coil. Sub Size       18" Mounting Depth       11" Mounting Hole Diameter       16.75" Outside Driver Diameter       18.5" Motor Width       8.25" Weight       36lbs VC Diameter       3" Displacement       .26³ ft Power Handling RMS/Peak       2000 / 4000 Impedance (Ohm)       D.7 / D1 / D1.4 /D2 Sd       1159.00cm² Vas        na Cms        na Mms        na Fs        na BL        na Re        na Le        na Qms        na Qes        na Qts       na  Xmax       na  Ref SPL @ 1 watt       na  Suggested Sealed       na  Suggested Ported       5.5³ ft   NEO SUB       Key Features • Extremely rigid AR paper cone assembly • Multilayered polymer foam surround • Polypropylene dust cover with DC logo • 5 8” OD semi cup progressive roll spiders • Dual extra heavy duty interweaved tinsel lead wire • Cast aluminum black frame • FEA analyzed and optimized motor assembly – Fully CNC machined • Rubber mounting gasket • Chrome spring loaded push terminals • Dual 0.7: 1.0: 1.4 or 2 ohm 3" 8 layer hi-temp aluminum voice coil