B&C Speaker 12FW64

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.1dB
• Frequency response 55 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 55Hz
• Mechanical quality factor QMS 3.50
• Electrical quality factor QES 0.32
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 261cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1mH
• VC Diameter 64mm
• Winding height HVC 14mm
• Winding material Aluminium
• Former material Glass Fibre

Magnet

• Flux density B 1.3T
• Force factor Bl 15.5N/A
• Motor constant Bl/√RE 6.8N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 258mm
• Effective area SD 522cm²
• Moving mass MMS 47g
• Moving mass (without air load) MMD 38.4g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 5.1N/mm
• Compliance CMS 196µm/N
• Equivalent volume to the compliance VAS 64L
• Mechanical resistance RMS 4.64N·s/m

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 315mm
• Baffle cutout diameter 283mm
• Overall depth 136mm
• Flange thickness 13mm
• Mounting depth 123mm
• Volume occupied by the driver 3L
• Net weight 5.65kg