Dual 2 ohm 10″ Subwoofer 500W – 1,500W optimal power range 3 inch voice coil Triple stack 225oz motor Double high current tinsel leads Nomex spider Designed for use in small vented enclosures. Engineered in the USA. Also available in dual 4 ohm Description The 4000 series 10 employs a finely-tuned balance of damping and extensive motor force to achieve very high efficiency, offering exceptional versatility and unmatched performance in a variety of real-world functions. Fs 38.63 HzQms 7.724Vas 6.819 litersCms 0.047 mm/NMms 362 gRms 11.35 kg/sDia 202.4 mmSd 319.6 sq cm Qes 0.571Re 4.286 ohmsLe 5.867 mHZ 62.29 ohmsBL 25.68 TmBL^2/Re Qts 0.532no 0.0664 %SPL 80.37 dBEBP 67.65 Nominal Diameter 10inOverall Diameter 10.79in / 274mmMounting Hole Diameter 9.25in / 235mmBolt Hole Circle DiameterMotor Outer Diameter 7.72in / 196mmMounting Depth 7.28in / 185mmRequired Pole Vent ClearanceDriver Displacement 0.108 cu ft / 3.07 l