B&C Speaker 12CL64

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.7dB
• Frequency response 50 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 52Hz
• Mechanical quality factor QMS 4.30
• Electrical quality factor QES 0.32
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 235cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 1.1mH
• VC Diameter 64mm
• Winding height HVC 13mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.15T
• Force factor Bl 17.5N/A
• Motor constant Bl/√RE 7.46N/√W
• Air gap height HAG 8mm
• Material Neodymium Inside Slug

Diaphragm

• Effective diameter 258mm
• Effective area SD 522cm²
• Moving mass MMS 55g
• Moving mass (without air load) MMD 46.5g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 5.81N/mm
• Compliance CMS 172µm/N
• Equivalent volume to the compliance VAS 64L
• Mechanical resistance RMS 4.18N·s/m

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 313mm
• Baffle cutout diameter 282mm
• Overall depth 133mm
• Flange thickness 9mm
• Mounting depth 124mm
• Volume occupied by the driver 2L
• Net weight 1.9kg