B&C 6NSM51 6.5-Inch Speaker Driver - 250W RMS, 8 Ohm

The B&C 6NSM51 6.5-Inch Speaker Driver features a cast aluminium sealed chassis, high strength neodymium motor, and large internal volume for good low frequency performance. Large voice coils provide power handling, while careful selection of suspension and cone components results in exceptional sensitivity. These dedicated narrow-bandwidth midranges offer the lowest distortion at given output of any midrange available.

B&C 6NSM51 6.5-Inch Speaker Driver Features

- 500 W continuous program power capacity
- 51 mm (2 inches) aluminium voice coil
- 300 - 6000 Hz response
- 100 dB sensitivity
- Ideal for Direct Radiation and Horn Loaded Midrange application
- Waterproofed on front of cone
- Extremely Low Distortion Figure

B&C 6NSM51 6.5-Inch Speaker Driver Specifications

- Nominal diameter: 170 mm (6.5 inches)
- Nominal impedance: 8 Ω
- Minimum impedance: 6.6 Ω
- Nominal power handling: 250 W
- Continuous power handling: 500 W
- Sensitivity (1W/1m): 100.0 dB
- Frequency range: 300 - 6000 Hz
- Voice coil diameter: 51 mm (2 inches)
- Winding material: Aluminium
- Former material: Glass Fibre
- Winding depth: 8.5 mm (0.33 inches)
- Magnetic gap depth: 6 mm (0.24 inches)
- Flux density: 1.6T
- Connection: Spade Terminals

Design:
- Surround shape Triple Roll
- Cone shape: Radial
- Magnet material: Neodymium Ring
- Spider: Single
- Pole design: T - Pole
- Woofer cone treatment: WP Waterproof Front Side

Parameters:
- Fs: 280 Hz
- Re: 5.4 Ω
- Vas: 0.7 dm³
- Sd: 143.0 cm²
- η₀: 2.2%
- Xmax: ± 2.8 mm
- Xvar: ± 3 mm
- Mms: 13.5 g
- Bl Product: 13.9 Tm
- Le: 0.15 mH
- EPB: 411 Hz

Physical:
- Overall diameter: 187 mm
- Bolt circle diameter: 172 mm
- Baffle cutout diameter: 151.0 mm
- Depth: 113 mm
- Flange and gasket thickness: 11 mm
- Air volume occupied by driver: 2.0 dm³
- Net weight: 2.7 kg