Jensen Vintage AlNiCo P12N

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 90Hz
• Mechanical quality factor QMS 4.36
• Electrical quality factor QES 0.94
• Total quality factor QTS 0.77

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 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 0.87mH
• VC Diameter 38mm
• Winding height HVC 10mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.26T
• Force factor Bl 10.6N/A
• Motor constant Bl/√RE 4.32N/√W
• Air gap height HAG 8mm
• Weight 0.826kg
• Material Alnico

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 30.9g
• Moving mass (without air load) MMD 23g
• Material Paper

Suspensions

• Stiffness KMS 9.9N/mm
• Compliance CMS 101µm/N
• Equivalent volume to the compliance VAS 34.6L
• Mechanical resistance RMS 4.01N·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