B&C Speaker 12BG76

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90dB
• Frequency response 45 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 44Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.41

Large signal parameters

• Maximum linear excursion xmax 9.5mm
• Air volume displaced at xmax VD 496cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 1.1mH
• VC Diameter 76mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.25T
• Force factor Bl 22.7N/A
• Motor constant Bl/√RE 9.77N/√W
• Air gap height HAG 11.5mm
• Material Neodymium Ring

Diaphragm

• Effective diameter 258mm
• Effective area SD 522cm²
• Moving mass MMS 148g
• Moving mass (without air load) MMD 139g
• Material Waterproof Both Sides

Suspensions

• Stiffness KMS 11.6N/mm
• Compliance CMS 86µm/N
• Equivalent volume to the compliance VAS 32L
• Mechanical resistance RMS 6.93N·s/m
• Spider material Silicone

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 315mm
• Baffle cutout diameter 284mm
• Overall depth 161mm
• Flange thickness 21mm
• Mounting depth 140mm
• Volume occupied by the driver 2L
• Net weight 5.3kg