f 2,000W – 4,000W optimal power range 4 inch flat wire high temp voice coil Triple stack 500oz motor 87lb total weight 23.5mm Xmax Double high current tinsel leads Triple blend material spider Designed for use in vented enclosures. Engineered in the USA. Sold individually ALL AUDIO DYNAMICS IS PICK UP INSTORE ONLY Description The 6000 series 15 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 36.81 HzQms 8.277Vas 22.14 litersCms 0.026 mm/NMms 720.3 gRms 20.09 kg/sDia 314 mmSd 774.3 sq cm Qes 0.68Re 1.675 ohmsLe 1.73 mHZ 22.06 ohmsBL 20.26 Tm Qts 0.628no 0.157 %SPL 84.09 dBEBP 54.13 XMax 23.5mm Nominal Diameter 15inOverall Diameter 15.5in / 395mmMounting Hole Diameter 13.77in / 350mmBolt Hole Circle DiameterMotor Outer Diameter 9.8in / 250mmMounting Depth 10.6in / 270mmRequired Pole Vent ClearanceDriver Displacement 0.285 cu ft / 8.075 l Minimum Sealed Volume N/AMinimum Vented Volume cu ft / l net*