10"; 1,600W RMS; 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; Nonmagnetic nonresonate die-cast aluminum frame; 3" 4-layer voice coils with direct connect wire increases power handling; High-temperature-tolerance adhesives resist thermal failure; Nontransfer spruce pulp cone with UV & chemical protection; Stitched & glued surround/cone joints for strongest bonding; Extended excursion polyether foam surround with UV protection; Dual-polycotton suspension dampens violent accelerations; Stitched voice coil leads prevent potential damage; Efficiency: 83.8dB @ 1W/1m; Motor volume: 272oz; Mounting depth: 6"; Optimum sealed enclosure: .75 cu ft; Optimum ported enclosure: 1.25 cu ft; Includes 1-piece gasket/trim ring with concealed mounting holes;