Dual 2ohm ; Overcompensating motor structure for increased magnetic strength; 12mm T-yoke & top plate improve low frequency dynamics; Vented T-yoke & frame reduces voice coil heat buildup; Die-cast aluminum heat sink dust cap absorbs voice coil heat; Aluminum dust cap fins dissipate heat & strengthen cone; Nonmagnetic nonresonate die-cast aluminum frame; 2.5 4-layer voice coil with large-gauge wire increases power; High-temperature-tolerance adhesives resist thermal failure; Nickel-plated 8-gauge spring-loaded compression wire terminals; Nontransfer spruce pulp cone with UV & chemical protection; High-density polyether foam surround with UV & chemical protection; Dual-polycotton suspension dampens violent accelerations; Stitched voice coil leads prevent potential damage; 2,400W max; 1,200W RMS; Efficiency: 83.62dB @ 1W/1m; Motor volume: 288oz; Mounting depth: 6.125; Optimum sealed enclosure: .75 cu ft; Optimum ported enclosure: 1.25 cu ft; Includes 1-piece gasket/trim ring with concealed mounting holes;