B&C Speaker 8FG64

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.2dB
• Frequency response 50 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51Hz
• Mechanical quality factor QMS 10.10
• Electrical quality factor QES 0.32
• Total quality factor QTS 0.31

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 154cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 1.7mH
• VC Diameter 64mm
• Winding height HVC 19mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 0.9T
• Force factor Bl 15.8N/A
• Motor constant Bl/√RE 6.56N/√W
• Air gap height HAG 10mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 41g
• Moving mass (without air load) MMD 38.5g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 4.41N/mm
• Compliance CMS 227µm/N
• Equivalent volume to the compliance VAS 15L
• Mechanical resistance RMS 1.3N·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 4.0kg