Jensen Vintage AlNiCo P12N

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.3dB

Thiele & Small parameters

• Resonance frequency (free air) fS 91Hz
• Mechanical quality factor QMS 5.77
• Electrical quality factor QES 0.98
• Total quality factor QTS 0.84

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 12.0Ω
• Inductance (1kHz) LE 1.05mH
• VC Diameter 38mm
• Winding height HVC 10mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.26T
• Force factor Bl 13.7N/A
• Motor constant Bl/√RE 3.96N/√W
• Air gap height HAG 8mm
• Weight 0.826kg
• Material Alnico

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 27g
• Moving mass (without air load) MMD 19.1g
• Material Paper

Suspensions

• Stiffness KMS 8N/mm
• Compliance CMS 125µm/N
• Equivalent volume to the compliance VAS 42.2L
• Mechanical resistance RMS 2.68N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 12″
• 307mm
• Overall diameter 307mm
• Volume occupied by the driver (estimated) 1.3L
• Net weight 3.1kg
• Frame material Pressed Sheet