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B&C Speakers 8NW51-4 – 8" Neodymium Woofer (4 Ω)
Article number: 8NW51-4
Size: 8 inches / 200 mm
Impedance: 4 Ω
Power endurance: 200 W RMS / 400 W Program
Sensitivity: 97 dB (1W/1m)
Frequency range: 70 – 3000 Hz
Voice coil: 2" (51 mm) Copper / Fiberglass
Magnet: Neodymium ring
Cone material: TWP treated (waterproof on both sides)
Outer dimensions: 209 mm
Mounting diameter: 185 mm
Depth: 87mm
Weight: ~1.5 kg
Thiele/Small parameters
- Fs: 76 Hz
- Re: 2.5 Ω
- Qms: 5.3
- Qes: 0.26
- Qty: 0.25
- Vase: 11 liters
- Xmax: ±6 mm
- Bl: 11.2 T m
- Weight: 18 g
- Le: 0.2 mH
- Sd: 220 cm²
Description: The 8NW51-4 is a high-performance 8-inch woofer with neodymium ring magnet, waterproof cone and extremely high sensitivity. It is optimized for midbass in professional sound systems, portable boxes and installations where low weight and efficiency are crucial. Recommended volume approx. 15–18 liters with tuning around 65–70 Hz.