Jensen Vintage Ceramic C12N

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

Thiele & Small parameters

• Resonance frequency (free air) fS 110Hz
• Mechanical quality factor QMS 6.84
• Electrical quality factor QES 1.25
• Total quality factor QTS 1.06

Large signal parameters

• Maximum linear excursion xmax 1mm
• Air volume displaced at xmax VD 49cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 16Ω
• DC resistance RE 12.5Ω
• Inductance (1kHz) LE 1.55mH
• VC Diameter 38mm
• Winding height HVC 10mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.15T
• Force factor Bl 13.4N/A
• Motor constant Bl/√RE 3.78N/√W
• Air gap height HAG 8mm
• Weight 0.81kg
• Material Ferrite

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 25.6g
• Moving mass (without air load) MMD 17.7g
• Material Paper

Suspensions

• Stiffness KMS 12N/mm
• Compliance CMS 83µm/N
• Equivalent volume to the compliance VAS 28L
• Mechanical resistance RMS 2.59N·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