B&C Speaker 8FMB51

16Ω

Woofer

Nominal diameter8″ / 200 mm
Resonance68 Hz
Q factor0.39
Sensitivity93.1 dB
Linear excursion± 5.5 mm
Program Power500 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 93.1dB
  • Frequency response 68 - 4500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 68Hz
  • Mechanical quality factor QMS 4.10
  • Electrical quality factor QES 0.43
  • Total quality factor QTS 0.39

Large signal parameters

  • Maximum linear excursion xmax 5.5mm
  • Air volume displaced at xmax VD 125cm³
  • Power handling P 250W
  • Program power Pmax 500W

Voice Coil

  • Nominal impedance Z 16Ω
  • DC resistance RE 9.8Ω
  • Inductance (1kHz) LE 0.83mH
  • VC Diameter 51mm
  • Winding height HVC 15mm
  • Winding material Aluminium
  • Former material Glass Fibre

Magnet

  • Flux density B 1.19T
  • Force factor Bl 13.7N/A
  • Motor constant Bl/√RE 4.39N/√W
  • Air gap height HAG 8mm
  • Material Ferrite

Diaphragm

  • Effective diameter 170mm
  • Effective area SD 227cm²
  • Moving mass MMS 19.7g
  • Moving mass (without air load) MMD 17.1g
  • Material Waterproof

Suspensions

  • Stiffness KMS 3.53N/mm
  • Compliance CMS 283µm/N
  • Equivalent volume to the compliance VAS 20.5L
  • Mechanical resistance RMS 2.05N·s/m

Dimensions

  • Nominal diameter 8
  • 200mm
  • Overall diameter 225mm
  • Baffle cutout diameter 187mm
  • Overall depth 92mm
  • Flange thickness 9mm
  • Mounting depth 83mm
  • Volume occupied by the driver 1.1L
  • Net weight 3.4kg
B&C Speaker 8FMB51 Impedance
B&C Speaker 8FMB51 SPL
B&C Speaker 8FMB51 Dimensions

Similar woofers to B&C Speaker 8FMB51

Oberton 10NMB500 Mid Bass

Oberton 10NMB500

8 Ω
10 Mid Bass
fS68.2 Hz
SD317 cm²
65 - 3000 Hz
QTS0.41
xmax8.3 mm
SPL1W93.2 dB
Bl/√RE6.52
Pmax1000 W
FaitalPRO 10FH530 16Ω Subwoofer

FaitalPRO 10FH530 16Ω

16 Ω
10 Subwoofer
fS67 Hz
SD347 cm²
70 - 4000 Hz
QTS0.39
xmax7.5 mm
SPL1W93.4 dB
Bl/√RE7.02
Pmax1000 W
B&C Speaker 8MBX51 Woofer

B&C Speaker 8MBX51

16 Ω
8 Woofer
fS68 Hz
SD220 cm²
65 - 4000 Hz
QTS0.38
xmax6 mm
SPL1W93.5 dB
Bl/√RE4.29
Pmax400 W