Jensen Vintage Ceramic C12K-2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 79Hz
• Mechanical quality factor QMS 12.07
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.47

Large signal parameters

• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.7Ω
• Inductance (1kHz) LE 0.84mH
• VC Diameter 50mm
• Winding height HVC 10mm
• Winding material Copper
• Former material Nomex

Magnet

• Flux density B 1.15T
• Force factor Bl 14.7N/A
• Motor constant Bl/√RE 5.69N/√W
• Air gap height HAG 8mm
• Weight 1.45kg
• Material Ferrite

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 32.2g
• Moving mass (without air load) MMD 24.3g
• Material Paper

Suspensions

• Stiffness KMS 7.94N/mm
• Compliance CMS 126µm/N
• Equivalent volume to the compliance VAS 43.1L
• Mechanical resistance RMS 1.32N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 12″
• 307mm
• Overall diameter 307mm
• Volume occupied by the driver (estimated) 1.8L
• Net weight 4.3kg
• Frame material Pressed Sheet