Jensen Vintage Ceramic C12N

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 113Hz
• Mechanical quality factor QMS 6.55
• Electrical quality factor QES 0.94
• Total quality factor QTS 0.82

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 74cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 0.58mH
• VC Diameter 38mm
• Winding height HVC 10mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.15T
• Force factor Bl 8.6N/A
• Motor constant Bl/√RE 4.6N/√W
• Air gap height HAG 8mm
• Weight 0.81kg
• Material Ferrite

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 29.4g
• Moving mass (without air load) MMD 21.5g
• Material Paper

Suspensions

• Stiffness KMS 14.9N/mm
• Compliance CMS 67µm/N
• Equivalent volume to the compliance VAS 22.8L
• Mechanical resistance RMS 3.2N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 12″
• 307mm
• Overall diameter 307mm
• Volume occupied by the driver (estimated) 1.4L
• Net weight 3.3kg
• Frame material Pressed Sheet