B&C Speaker 8FW51

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.2dB
• Frequency response 70 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 74Hz
• Mechanical quality factor QMS 9.30
• Electrical quality factor QES 0.21
• Total quality factor QTS 0.21

Large signal parameters

• Maximum linear excursion xmax 6mm
• Air volume displaced at xmax VD 132cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 0.56mH
• VC Diameter 51mm
• Winding height HVC 17mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.35T
• Force factor Bl 17.7N/A
• Motor constant Bl/√RE 7.76N/√W
• Air gap height HAG 10mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 27g
• Moving mass (without air load) MMD 24.5g
• Material Waterproof Both Sides

Suspensions

• Stiffness KMS 5.88N/mm
• Compliance CMS 170µm/N
• Equivalent volume to the compliance VAS 12L
• Mechanical resistance RMS 1.35N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 225mm
• Baffle cutout diameter 187mm
• Overall depth 100mm
• Flange thickness 9mm
• Mounting depth 91mm
• Volume occupied by the driver 1.5L
• Net weight 5.6kg