2,500W max; 1,200W RMS; 25 dual 2ohm voice-coil configuration; Overcompensating motor structure for increased magnetic strength; 10mm T-yoke & top plate improve low-frequency dynamics; Vented T-yoke & frame reduce voice-coil heat buildup; 2.5 Dual 2ohm 4-layer voice coils with nickel-plated 8-gauge spring-loaded terminals; High-temperature-tolerant adhesives resist thermal failure; Composite spruce pulp cone with twisted & woven flax fiber; Extended-excursion NBR surround with UV protection; Stitched & glued surround/cone joints for strongest bonding; Poly-cotton suspension dampens violent accelerations; Stitched voice lead leads prevent potential damage; Efficiency: 83.6 @ 1W/1m; Motor volume: 254oz; Mounting depth: 6.5; Optimum sealed enclosure: 1.5 cu ft; Optimum ported enclosure: 2.25 cu ft; Includes 1-piece gasket/trim ring with concealed mounting holes;