B&C 8NSM64 8-Inch Mid Range Driver - 250W RMS, 16 Ohm

The B&C 8NSM64 8-Inch Mid Range Driver is ideal for simplified cabinet assembly and efficient thermal transfer to the air. The NSM series of sealed back midranges feature a cast aluminum 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 8NSM64 8-Inch Mid Range Driver Features

- 500 W continuous program power capacity
- 64 mm (2.5 inch) aluminium voice coil
- 245 - 2000 Hz response
- 100 dB sensitivity
- Waterproofed on front of cone
- Ideal for Direct Radiation and Horn Loaded Midrange application

B&C 8NSM64 8-Inch Mid Range Driver Specifications

- Nominal Basket Diameter: 200 mm (8 inches)
- Nominal Impedance: 16 Ω
- Minimum Impedance: 14.5 Ω
- Nominal Power Handling: 250 W
- Continuous Power Handling: 500 W
- Frequency Response: 245 - 2000 Hz
- Sensitivity (1W/1m): 100 dB
- Voice Coil Diameter: 64 mm (2.5 inches)
- Winding Material: Aluminium
- Former Material: Glass Fibre
- Winding Depth: 14.2 mm (0.56 inches)
- Magnetic Gap Depth: 10 mm (0.39 inches)
- Flux Density: 1.55 T
- Connection: Spade Terminals

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

Parameters:
- Fs: 245 Hz
- Re: 10.9 Ω
- Qes: 0.45
- Qms: 10.2
- Qts: 0.43
- Vas: 1.5 dm³
- Sd: 220.0 cm²
- η₀: 4.7 %
- Xmax: ± 2.0 mm
- Xvar: ± 1.7 mm
- Mms: 19 g
- Bl: 28 Txm
- Le: 1.9 mH
- EBP: 544 Hz

Physical:
- Overall diameter: 239 mm (9.41 inches)
- Bolt circle diameter: 222 mm (8.74 inches)
- Baffle cutout diameter: 200 mm (7.87 inches)
- Depth: 115 mm (4.53 inches)
- Flange and gasket thickness: 16 mm (0.63 inches)
- Air volume occupied by driver: 3.5 dm³
- Net weight: 4.58 kg