B&C Speaker 12NW76

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.2dB
• Frequency response 40 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43Hz
• Mechanical quality factor QMS 3.75
• Electrical quality factor QES 0.15
• Total quality factor QTS 0.15

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 418cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz) LE 1.1mH
• VC Diameter 76mm
• Winding height HVC 19mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.3T
• Force factor Bl 22N/A
• Motor constant Bl/√RE 11.9N/√W
• Air gap height HAG 11mm
• Material Neodymium Ring

Diaphragm

• Effective diameter 258mm
• Effective area SD 522cm²
• Moving mass MMS 82g
• Moving mass (without air load) MMD 73.4g
• Material Waterproof Both Sides

Suspensions

• Stiffness KMS 5.78N/mm
• Compliance CMS 173µm/N
• Equivalent volume to the compliance VAS 64.5L
• Mechanical resistance RMS 5.91N·s/m

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 315mm
• Baffle cutout diameter 283mm
• Overall depth 147mm
• Flange thickness 14mm
• Mounting depth 133mm
• Volume occupied by the driver 2.5L
• Net weight 4.9kg