B&C Speaker 12FL64

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.3dB
• Frequency response 50 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51Hz
• Mechanical quality factor QMS 6.60
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.32

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 5.7Ω
• Inductance (1kHz) LE 1.6mH
• VC Diameter 64mm
• Winding height HVC 13mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.2T
• Force factor Bl 20.2N/A
• Motor constant Bl/√RE 8.46N/√W
• Air gap height HAG 9mm

Diaphragm

• Effective diameter 258mm
• Effective area SD 522cm²
• Moving mass MMS 75g
• Moving mass (without air load) MMD 66.4g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 7.81N/mm
• Compliance CMS 128µm/N
• Equivalent volume to the compliance VAS 50L
• Mechanical resistance RMS 3.64N·s/m

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 315mm
• Baffle cutout diameter 283mm
• Overall depth 135mm
• Flange thickness 14mm
• Mounting depth 121mm
• Volume occupied by the driver 3L
• Net weight 5.0kg