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B&C Speakers 21SW152 – 21" Neodymium Subwoofer (4 Ω / 8 Ω)
Article number: 21SW152
Impedance: Available in 4 Ω and 8 Ω
Power endurance: 2000 W AES / 4000 W Program
Sensitivity: 96 dB (1W/1m)
Frequency range: 30 – 1000 Hz
Voice coil: 6" (153 mm) Copper / Fiberglass
Magnet: Neodymium (Inside Slug)
Cone material: TWP treated (waterproof on both sides)
Outer dimensions: 547 mm
Mounting diameter: 508 mm
Depth: 261mm
Weight: 18.5 kg
Thiele/Small parameters
- Fs: 32 Hz
- Re: 3.3 Ω (4 Ω version)
- Qms: 7.00
- Qes: 0.31
- Qty: 0.30
- Vase: 200 liters
- Xmax: ±15 mm
- Xvar: 16 mm
- Bl: 32.5 T m
- Weight: 460 g
- Le: 1.5 mH
- Sd: 1680 cm²
- Efficiency: 2.2%
- EBP: 103 Hz
Description: The 21SW152 is B&C's flagship for extreme subwoofer applications. With a 6" voice coil, vented slot, aluminum demodulation ring and dual silicone spindles, it delivers brutal power and low distortion. Recommended volume approx. 190 liters with tuning around 33 Hz. Perfect for horn-loaded systems, reflex boxes and concert applications.