B&C Speaker 320K/C-A

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.2dB
• Frequency response 80 - 16000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 82Hz
• Mechanical quality factor QMS 13.30
• Electrical quality factor QES 0.52
• Total quality factor QTS 0.50

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 104cm³
• Power handling P 120W
• Program power Pmax 240W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 1.1mH
• VC Diameter 38mm
• Winding height HVC 9mm
• Winding material Copper
• Former material Kraft Paper

Magnet

• Flux density B 1.4T
• Force factor Bl 12.2N/A
• Motor constant Bl/√RE 5.25N/√W
• Air gap height HAG 9mm
• Material Ferrite

Diaphragm

• Effective diameter 258mm
• Effective area SD 522cm²
• Moving mass MMS 27g
• Moving mass (without air load) MMD 18.4g

Suspensions

• Stiffness KMS 7.41N/mm
• Compliance CMS 135µm/N
• Equivalent volume to the compliance VAS 53L
• Mechanical resistance RMS 1.05N·s/m

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 316mm
• Baffle cutout diameter 286mm
• Overall depth 136mm
• Flange thickness 12mm
• Mounting depth 124mm
• Volume occupied by the driver 3L
• Net weight 4.6kg