21NLW4000 Driver 21inch Neodymium...
 Made in Italy
 97 dB SPL 1W / 1m sensitivity
 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
 70 mm (2,76 in) peak to peak excursion
 Nominal Power Handling 1600W
 Continuous Power Handling 3200W
 Single Demodulating Ring (SDR) for lower distortion
 Composite reinforced straight ribbed cone
 Optimized high grade neodymium magnet assembly
 Recommended for subwoofer usage in vented enclosures