Jensen Vintage AlNiCo P12Q

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 85.6Hz
• Mechanical quality factor QMS 10.94
• Electrical quality factor QES 3.33
• Total quality factor QTS 2.55

Large signal parameters

• Maximum linear excursion xmax 1mm
• Air volume displaced at xmax VD 49cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 32Ω
• DC resistance RE 25.2Ω
• Inductance (1kHz) LE 1.59mH
• VC Diameter 32mm
• Winding height HVC 8mm
• Winding material Copper
• Former material Nomex

Magnet

• Flux density B 0.98T
• Force factor Bl 10.2N/A
• Motor constant Bl/√RE 2.02N/√W
• Air gap height HAG 6mm
• Weight 0.3kg
• Material Alnico

Diaphragm

• Effective diameter 250mm
• Effective area SD 490cm²
• Moving mass MMS 25.3g
• Moving mass (without air load) MMD 17.5g
• Material Paper

Suspensions

• Stiffness KMS 7.25N/mm
• Compliance CMS 138µm/N
• Equivalent volume to the compliance VAS 46.6L
• Mechanical resistance RMS 1.24N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 12″
• 306mm
• Overall diameter 306mm
• Volume occupied by the driver (estimated) 0.78L
• Net weight 1.9kg
• Frame material Pressed Sheet