B&C 21SW152 21-Inch Speaker Driver - 2000W RMS, 4 Ohm, Spring Terminals

The B&C 21SW152 21-Inch Speaker Driver boasts legendary B&C technology made with their famously critical quality control, allowing loudspeaker designs with appropriately scaled performance.

Recone Kit: JP101966 (B&C RCK21SW1524)

B&C 21SW152 21-Inch Speaker Driver Features

- 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

B&C 21SW152 21-Inch Speaker Driver Specifications

- Nominal Basket Diameter: 530 mm (21.0 inches)
- Nominal Impedance: 4 Ω
- Minimum Impedance: 4.2 Ω
- Nominal Power Handling: 2000 W
- Continuous Power Handling: 4000 W
- Frequency Response: 30 - 1000 Hz
- Sensitivity: 96.0 dB
- Voice Coil Diameter: 153 mm (6.0 inches)
- Winding Material: Copper
- Former Material: Glass Fibre
- Winding Depth: 30 mm (1.18 inches)
- Magnetic Gap Depth: 12.0 mm (0.5 inches)
- Flux Density: 1.2 T
- Connection: Spring Terminals

Design:
- Surround shape: Triple Roll
- Cone shape: Radial
- Magnet material: Neodymium Inside Slug
- Spider: Double Silicone
- Pole design: T-Pole
- Waterproofing Treatment: TWP Waterproof Both Sides
- Recommended enclosure: 190.0 dm³
- Recommended tuning: 33 Hz

Parameters:
- Fs: 32 Hz
- Re: 3.3 Ω
- Qes: 0.31
- Qms: 7.0
- Qts: 0.3
- Vas: 200.0 dm³
- Sd: 1680 cm²
- η₀: 2.2 %
- Xmax: ± 15.0 mm
- Xvar: ± 16.0 mm
- Mms: 460.0 g
- Bl: 62.5 Txm
- Le: 1.5 mH
- EBP: 103 Hz

Physical:
- Overall diameter: 547 mm (21.5 inches)
- Bolt circle diameter: 527 mm (20.7 inches)
- Baffle cutout diameter: 508 mm (20.0 inches)
- Depth: 261 mm (10.3 inches)
- Flange and gasket thickness: 16 mm (0.63 inches)
- Air volume occupied by driver: 20.8 dm³
- Net weight: 18.5 kg