The Level 4 m2 was designed to take even more power and get even louder than the m1. With fantastic power handling and smashing lows its hard to beat. The Level 4 sub is a large triple stacked motor with a chrome top plate and T yoke yielding 23.5mm of X-Max. Furthermore, you get the upgraded triple progressive spiders, cone, surround, 3" coil, cast basket, push terminals and upgraded lead wire sewn to the spider. This sub is rated at 1400w RMS and 2800w peak. Sub Size       18" Mounting Depth       9.5" Mounting Hole Diameter       16.75" Outside Driver Diameter       18.5" Motor Width       7.75" Weight       36lbs VC Diameter       3" Displacement       .26³ ft Magnet Weight       29lbs Power Handling RMS/Peak       1400 / 2800 Impedance (Ohm)       D1 or D2 Sd       1217cm² Vas       175.29 liters Cms       .085 mm/N Mms       427.53 g Fs       26.4 Hz BL       19.18 NA Re       3.82 Ohm Le       3.78 mH Qms       11.82 Qes       .746 Qts       .701 Xmax       23.5 mm Ref SPL @ 1 watt       88.2 dB Suggested Sealed       4³ ft Suggested Ported       5.5³ ft   LEVEL 4 SUB     Next Key Features • Extremely rigid non-pressed paper cone assembly • Multilayered polymer foam surround • Polypropylene dust cover with DC logo • Triple 8” OD semi cup progressive roll spider • Extra heavy duty interweaved tinsel lead wire sewn to spider • Cast aluminum black frame • FEA analyzed and optimized motor assembly – Fully CNC machined • Rubber mounting gasket • Chrome spring loaded push terminals • 3” Hi-temp Aluminum voice coil wound on black anodized voice coil former