Customer Service: 01308 898 763
  • Features:
    Low distortion bass.
  • Benefits:
    The B250.8 features a symmetrical field magnet and long voice coil for large linear excursion capability. It also has double rear suspensions whose characteristics are matched to that of the motor assembly for stability and linearity at high drive levels. An extended centre pole is utilised to minimise distortion inducing inductance swing at high power levels. The Thiele-Small parameters are optimised for bass extension.
Specifications
  • Model Number: B250.8
  • Nominal Diameter (mm): 250
  • Power Capacity (Watt AES): 150
  • Sensitivity (dB/watt/m): 91.5
  • Frequency Range (Hz): 24-1000
  • Impedance (Ohms): 4, 8 or 16
  • BL Factor: 11.9
  • Voice Coil Diameter (mm): 38
  • Voice Coil Material: Copper
  • Maximum Excursion (mm): 25 (before damage)
  • Magnet Assembly Weight (Kg): 3.6
  • Effective Moving Mass (Kg): 0.040
  • Compliance (M/N): 0.00061
  • Volume Displaced (litres): 1.1
  • Connection: 5mm solder terminals
  • Chassis: Diecast Aluminium
Mounting Information
Parameter Measure Unit
Overall Diameter 285 mm
Mounting Bolt Circle Diameter 268 mm
Number and Size of Bolts 4 M5
Baffle Cutout Diameter 253 mm front mount
Baffle Cutout Diameter 245 mm rear mount
Depth 109.5 mm below front flange
Depth 119 mm total depth
Weight 4.9 Kg

B250.8_Line

Response Curve

B250.8_Resp

Thiele-Small Parameters
Parameter Measure Unit
Fs 32 Hz
Re 6.1 Ohms
Qa 2.21
Qe 0.35
Qt 0.3
Vas 89 litres
Xmax ±5.5 mm
Sd 323.65 cm²
Vd 178 cm³
Le 1 mH
Suggested Enclosures
Volume(litres) Vent Diameters(cm) Vent Length(cm) System Q -3db freq(Hz)
35 7.5 14 7 44
60 7.5 11 7 38
90 7.5 11 7 30

Factsheet PDF

pdf

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