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B&C 8 NSM 64

B&C 8 NSM 64

For simplified cabinet assembly and efficient thermal transfer to the air, our 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. 

More Information

  • 500 W continuous program power capacity
  • 64 mm (2.5 in) aluminium voice coil
  • 245 - 2000 Hz response
  • 100 dB sensitivity
  • Ideal for Direct Radiation and Horn Loaded
  • Midrange application

Technical Specification

 

General
Product type Cone driver
Brand B&C Speakers
Reference 8NSM64
Product code ALT008NSM648
Information
Nominal impedance 8 ohm
Dimensional category 8.5 inch, 9.5 inch
Frequency coverage type Midrange, High midrange
Manufacturer sensitivity 100 dB
Calculated sensitivity 99.84 dB
Nominal power handling 250 W
Bandwidth 245÷2000 Hz
Fundamental parameters
Sd 220 cm²
Mms 19 gr
Le 0.6 mH
Re 5.7 ohm
BL 22 T.m
Small signal parameters
Fs 245 Hz
Qes 0.35
Qms 9.3
Qts 0.34
Vas 1.5 L
Datas
Xmax ±2 mm
Calculated Xmax ±4.8333 mm
EBP 700 Hz
Zmin 8.2 ohm
Fs / Qts 721 Hz
Vas * Qts² 0.18 L
Efficiency 4.50%
Calculated efficiency 0.0606
Weight ~4.9 kg
Closed speaker Yes
Dimensions
Voice coil diameter 2.5 inch
Winding depth 13 mm
Gap height 10 mm
External dimensions 210 | 239 mm
Baffle cutout diameter 200 mm
Front thickness 16 mm
Depth after front 99 mm
Shape & Materials
Front chape Non cylindrical
Magnet type Neodymium
Basket masterial Aluminium
Winding material Aluminium
Voice coil former Glass fiber

 

 

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