Large format 21” subwoofer, the 21SW152. This next generation 21” subwoofer transducer features a newly designed, ventilation optimized chassis. The 150mm (6”) split winding voice coil safely allows over 60mm (2.5”) of controlled peak-to-peak excursion. The 21SW152 is rated at 4000W continuous power (2000W AES) with a sensitivity of and 97 dB 1W/1 m. It weighs in at a mere 41lbs (18.5 kg).* 4000 W continuous program power capacity* 153 mm (6 in) split winding copper voice coil* 30 – 1000 Hz response* 96 dB sensitivity* 60 mm peak-to-peak excursion before damage* Neodymium magnet allows a very high force factor and linear excursion* Double silicone spider with optimized compliance* Ventilated voice coil gap for reduced power compression* Aluminium demodulating ring for very low distortion* Nominal Diameter: 530 mm (21 in)Nominal Impedance * 4 ohm Minimum Impedance * 4.2 ohm Nominal Power Handling (AES) * 2000 WContinuous Power Handling * 4000 WSensitivity (1W/1m) * 96 dBFrequency Range * 30 - 1000 HzVoice Coil Diameter * 153 mm (6 in)Winding Material * CopperFormer Material * Glass FibreMagnet Material * Neodymium RingWinding Depth * 30 mm (1.18 in)Magnetic Gap Depth * 12 mm (0.5 in)Flux Density * 1.2 TParameters* Fs * 32 HzRe * 3.4 ohmQes * 0.31 Qms * 7 Qts * 0.3 Vas * 200 dm3 (7.00 ft3)Sd * 1680 cm2 (260.40 in2)?0 * 2.2 %Xmax * ± 15 mmXvar * ± 16 mmMms * 460 gBl * 32.5 TxmLe * 1.5 mHMounting and Shipping info* Overall Diameter * 547 mm (21.5 in)Bolt Circle Diameter * 527 mm (20.7 in)Baffle Cutout Diameter * 508 mm (20 in)Depth * 261 mm (10.3 in)Flange and Gasket Thickness * 0.63 mm (16 in)Net Weight * 18.5 kg (40.7 lb)Shipping Weight * 20.9 kg (46 lb)Shipping Box * 590x590x300 mm (23.2x23.2x11.8 in)Design* Surround Shape * Triple RollCone Shape * RadialMagnet Type * Neodymium RingSpider * Double SiliconePole Design * T-Pole
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