B&C Speakers 4NDF34-8 – 4" Neodymium Midrange 8Ω
High-performance 4-inch midrange with neodymium motor and water-resistant cone – ideal for compact systems with high demands on sensitivity and precision.
- 200 W program power
- 92 dB sensitivity
- Neodymium Inside Slug Magnet
- Frequency range: 110 – 8000 Hz
- TWP-treated cone (water resistant on both sides)
Technical Specification
| Nominal diameter | 100 mm (4 in) |
| Impedance | 8Ω |
| Min. impedance | 6.4 Ω |
| Power endurance (continuous) | 100W |
| Impact resistance (program) | 200W |
| Sensitivity | 92 dB |
| Frequency range | 110 – 8000 Hz |
| Voice coil | 34mm copper |
| Magnetic material | Neodymium Inside Slug |
| Conform | Exponential |
| Spider | Single |
| Surround | Double Roll |
Thiele/Small parameters
| Fs | 110Hz |
| Qms | 4.2 |
| Qes | 0.28 |
| Qts | 0.27 |
| Vase | 1.6 dm³ |
| RE | 5.5 Ω |
| Smile | 0.23 mH |
| Bl | 9 Tm |
| MMS | 6.1g |
| Sd | 57 cm² |
| Xmax | 3.8mm |
| Xvar | 5.7mm |
| η₀ | 0.7% |
| EBP | 393 Hz |
Assembly & Dimensions
| Outer diameter | 127mm |
| Mounting holes | 103mm |
| Bolt circle | 115mm |
| Depth | 66mm |
| Weight | 0.55 kg |
| Shipping weight | 0.67 kg |
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