B & C SPEAKERS NA LLC 21SW152-4 21 in. Neodymium Subwoofer

The B & C Speakers NA LLC is a large format 21subwoofer with a newly designed, ventilation optimized chassis. It features a 150mm (6) split winding voice coil that allows over 60mm (2.5) of controlled peak-to-peak excursion. The subwoofer is rated at 4000W continuous power (2000W AES) with a sensitivity of 97 dB 1W/1 m.

• Nominal Diameter: 530 mm (21)
• Nominal Impedance: 4 ohm
• Nominal Power Handling (AES): 2000 W
• Continuous Power Handling: 4000 W
• Sensitivity (1W/1m): 97 dB
• Frequency Range: 30 - 1000 Hz
• Voice Coil Diameter: 153 mm (6)
• Winding Material: Copper
• Former Material: Glass Fibre
• Magnet Material: Neodymium Ring
• Winding Depth: 30 mm (1.18)
• Magnetic Gap Depth: 12 mm (0.5)
• Flux Density: 1.2 T
• Fs: 35 Hz
• Re: 3.3 ohm
• Qes: 0.33
• Qms: 7.3
• Qts: 0.32
• Vas: 176 dm3 (6.15 ft3)
• Sd: 1680 cm2 (260.40 in2)
• ?0: 2.4 %
• Xmax: ¡À 15 mm
• Xvar: ¡À 16 mm
• Mms: 437 g
• Bl: 32 Txm
• Le: 1.4 mH
• Overall Diameter: 547 mm (21.5)
• Bolt Circle Diameter: 527 mm (20.7)
• Baffle Cutout Diameter: 508 mm (20)
• Depth: 261 mm (10.3)
• Flange and Gasket Thickness: 0.63 mm (16)

• Large format 21subwoofer with newly designed, ventilation optimized chassis
• 150mm (6) split winding voice coil allows over 60mm (2.5) of controlled peak-to-peak excursion
• Rated at 4000W continuous power (2000W AES) with a sensitivity of 97 dB 1W/1 m
• Neodymium magnet allows for high force factor and linear excursion
• Double silicone spider with optimized compliance
• Ventilated voice coil gap for reduced power compression
• Aluminum demodulating ring for low distortion
• Surround shape: triple roll
• Cone shape: radial
• Magnet type: neodymium ring
• Spider: double silicone
• Pole design