B&C Speaker 12FW76

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.3dB
• Frequency response 55 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 54Hz
• Mechanical quality factor QMS 4.20
• Electrical quality factor QES 0.17
• Total quality factor QTS 0.18

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 365cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 1mH
• VC Diameter 76mm
• Winding height HVC 19mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.35T
• Force factor Bl 20.4N/A
• Motor constant Bl/√RE 11.6N/√W
• Air gap height HAG 11mm
• Material Ferrite

Diaphragm

• Effective diameter 258mm
• Effective area SD 522cm²
• Moving mass MMS 69.5g
• Moving mass (without air load) MMD 60.9g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 7.75N/mm
• Compliance CMS 129µm/N
• Equivalent volume to the compliance VAS 48.5L
• Mechanical resistance RMS 5.61N·s/m

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 315mm
• Baffle cutout diameter 283mm
• Overall depth 147mm
• Flange thickness 12mm
• Mounting depth 135mm
• Volume occupied by the driver 3L
• Net weight 8.55kg