B&C Speakers 6NSM51 – 6.5" Neodymium Midrange 8Ω
Extremely sensitive and low-distortion 6.5-inch midrange with sealed rear chamber – ideal for horn-loaded and direct-radiating systems with high demands on precision and thermal stability.
- 500 W program power
- 100 dB sensitivity
- 51 mm aluminum voice coil
- Frequency range: 300 – 6000 Hz
- Neodymium magnet with sealed aluminum cage
- Extremely low distortion
Technical Specification
| Nominal diameter | 170 mm (6.5 in) |
| Impedance | 8Ω |
| Min. impedance | 6.6 Ω |
| Power endurance (continuous) | 250W |
| Impact resistance (program) | 500W |
| Sensitivity | 100 dB (1W/1m) |
| Frequency range | 300 – 6000 Hz |
| Voice coil | 51mm aluminum |
| Magnetic material | Neodymium |
| Basket | Cast aluminum, sealed back chamber |
Thiele/Small parameters
| Fs | 280Hz |
| Qms | 5.4 |
| Qes | 0.68 |
| Qts | 0.60 |
| Vase | 0.7 dm³ |
| RE | 5.4 Ω |
| Smile | 0.15 mH |
| Bl | 13.9 Tm |
| MMS | 13.5g |
| Sd | 143 cm² |
| Xmax | ±2.8mm |
| η₀ | 2.2% |
| EBP | 412 Hz |
Assembly & Dimensions
| Outer diameter | 187mm |
| Mounting holes | 150.3 mm |
| Bolt circle | 172mm |
| Depth | 102mm |
| Weight | ~1.0 kg |
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