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B&C Speakers 8NDL51-4 – 8" Neodymium Woofer (4 Ω)
Article number: 8NDL51-4
Size: 8 inches / 200 mm
Impedance: 4 Ω
Power endurance: 200 W RMS / 400 W Program
Sensitivity: 90.6 dB (1W/1m)
Frequency range: 75 – 3000 Hz
Voice coil: 2" (51 mm) Copper / Fiberglass
Magnet: Neodymium (Inside Slug)
Cone material: TWP treated (waterproof on both sides)
Outer dimensions: 209 mm
Mounting diameter: 185 mm
Depth: 87 mm
Weight: ~1.5 kg
Thiele/Small parameters
- Fs: 75 Hz
- Re: 2.6 Ω
- Qms: 5.22
- Qes: 0.64
- Qts: 0.57
- Vase: 14 liters
- Xmax: ±7 mm
- Bl: 7.3 T m
- Weight: 18 g
- Le: 0.15 mH
- Sd: 220 cm²
Description: The 8NDL51-4 is a lightweight and powerful 8-inch woofer with neodymium magnet and waterproof cone. It delivers fast transient response and high SPL in compact boxes. Recommended volume approx. 17 liters with tuning around 65–70 Hz. Perfect for portable systems, SPL installations and applications where low impedance is required.