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20_07_21_16_14_03_01_940_8mbx51rear0010_39_44_999_8mbx51front10_39_46_183_8mbx51rear_b
Continuous power handling
Voice coil diameter
Magnet material
The MBX series mid-bass woofers from B&C Speakers offer acoustic designers a new range of high efficiency, wide bandwidth alternatives that are not currently available in the B&C range. These full-featured transducers incorporate lightweight neodymium motors, inside/outside wound copper clad aluminum wire voice coils, weatherproof impregnated paper cones, and a symmetrical inductance profile. The MBX Series is especially well suited for two-way loudspeaker enclosures.
 
 
 
 

Features

  • 400 W continuous program power capacity
  • 51 mm (2 in) aluminium voice coil
  • 60 - 4000 Hz response
  • 97 dB sensitivity
  • Neodymium ring magnet assembly
  • Aluminium ring allows a very low distortion figure
  • Ventilated voice coil gap for reduced power compression

Specifications

  • Nominal Diameter200 mm (8.0 in)
  • Nominal Impedance16 Ω
  • Minimum Impedance11.2 Ω
  • Nominal Power Handling1200 W
  • Continuous power handling2400 W
  • Sensitivity (1W/1m)397.0 dB
  • Frequency Range65 - 4000 Hz
  • Voice Coil Diameter51 mm (2.0 in)
  • Winding MaterialAluminium
  • Former MaterialGlass Fibre
  • Winding Depth15.0 mm (0.59 in)
  • Magnetic Gap Depth7.0 mm (0.28 in)
  • Flux Density1.3 T

Design

  • Surround ShapeTriple Roll
  • Cone ShapeCurvilinear
  • Magnet MaterialNeodymium Ring
  • SpiderSingle
  • Pole DesignT-Pole
  • Woofer Cone TreatmentWaterproof Impregnated Cone
  • Recommended Enclosure19.0 dm3 (0.67 ft3)
  • Recommended Tuning63 Hz

Parameters4

  • Resonance Frequency68 Hz
  • Re10.2 Ω
  • Qes0.43
  • Qms3.3
  • Qts0.38
  • Vas22.0 dm3 (0.78 ft3)
  • Sd220.0 cm2 (34.1 in2)
  • η₀1.5 %
  • Xmax± 6.0 mm
  • Xvar± 5.5 mm
  • Mms18.4 g
  • Bl13.7 Txm
  • Le0.65 mH
  • EBP158 Hz

Mounting and Shipping Info

  • Overall Diameter225 mm (8.86 in)
  • Bolt Circle Diameter210 mm (8.27 in)
  • Baffle Cutout Diameter187.0 mm (7.36 in)
  • Depth93 mm (3.66 in)
  • Flange and Gasket Thickness9 mm (0.35 in)
  • Air Volume Occupied by Driver1.1 dm3 (0.04 ft3)
  • Net Weight1.8 kg (3.97 lb)
  • Shipping Units1
  • Shipping Weight2.25 kg (4.96 lb)
  • Shipping Box255x255x150 mm (10.04x10.04x5.91 in)

Service Kit

  • 2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated minumum impedance. Loudspeaker in free air.
  • Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
  • Applied RMS Voltage is set to 4 V for 16 ohms Nominal Impedance.
  • Thiele-Small parameters are measured after a high level 20 Hz sine wave preconditioning test.