Sundown Audio Nightshade NS-Series NS6 15" 3000W Subwoofer NS v.6

3500 Watt RMS / 7000 Watt Peak Dual 1 or 2 ohm voice coils Optional carbon cone/dustcap available Custom tooled basket Custom-tooled ultra-linear spider packs Extended shorting ring Eight-layer voice coil Custom tooled basket Cast aluminum cooling ring Ultra-linear spider pack Unique air exchanging system forces hot air out and cool air in Aluminum vent ring Ultra-linear Mega Roll V2 surround  Features: The Nightshade 3,000-watt Neodymium sub is engineered to deliver incredibly powerful low end, with an extremely linear excursion and next-level thermal management. It features an eight-layer voice coil for excellent power handling and an extended shorting ring to minimize distortion and deliver a smooth, highly accurate sound at extreme SPL levels. Specifications: NS V.6 15 RE (Ohms) 1.8398 3.5978 FS (Hz) 30.5930 30.8881 VAS (L) 37.0627 36.0601 Qes 0.4382 0.4133 Qms 5.3509 5.4272 Qts 0.4050 0.3841 Le (mH) 1.6641 3.4904 BL (NA) 21.1132 30.6711 Mms (Gra