Jensen Electric Lightning C 12/70 EL

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.3dB

Thiele & Small parameters

• Resonance frequency (free air) fS 95Hz
• Mechanical quality factor QMS 14.77
• Electrical quality factor QES 0.70
• Total quality factor QTS 0.67

Large signal parameters

• Maximum linear excursion xmax 1mm
• Air volume displaced at xmax VD 49cm³
• Power handling P 70W
• Program power Pmax 140W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.6mH
• VC Diameter 50mm
• Winding height HVC 10mm
• Winding material Aluminum
• Former material Kapton

Magnet

• Flux density B 1.15T
• Force factor Bl 12.7N/A
• Motor constant Bl/√RE 5.05N/√W
• Air gap height HAG 8mm
• Weight 1.45kg
• Material Ferrite

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 29.9g
• Moving mass (without air load) MMD 22g
• Material Paper

Suspensions

• Stiffness KMS 10.6N/mm
• Compliance CMS 94µm/N
• Equivalent volume to the compliance VAS 32L
• Mechanical resistance RMS 1.21N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 12″
• 307mm
• Overall diameter 307mm
• Volume occupied by the driver (estimated) 1.9L
• Net weight 4.5kg
• Frame material Pressed Sheet