Eminence NSW4018-8 18" Tour Grade Subwoofer Driver

 SPECIFICATIONS 3,200 Watts continuous program power capacity (RMS) 4.0-inch copper voice coil 18.2 mm xmax @ 1/3 gap; 22.4 mm usable excursion @ 2/3 gap 26.7 mm peak excursion (damage point is even higher) Neodymium magnet provides very high force factor  Optimized cooling system 18” Nominal Diameter 96.6 dB sensitivity 20.9 lbs. Available in 8 Ohm only Designed and assembled in the USA Manufacturer's Datasheet (PDF) All Genuine Eminence loudspeakers are supported by a 7-year warranty against any manufacturer’s defect in the continental United States.  USAGE NOTES The Tour Grade line-up represents Eminence's top-of-the-line subwoofers.   The NSW4018-8  works well in all our 18" cabs where a good balance between low-end output and hard hitting mid-bass is desired.