Jensen Electric Lightning C 12/70 EL

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98dB

Thiele & Small parameters

• Resonance frequency (free air) fS 93Hz
• Mechanical quality factor QMS 14.50
• Electrical quality factor QES 0.94
• Total quality factor QTS 0.88

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 16Ω
• DC resistance RE 11.9Ω
• Inductance (1kHz) LE 0.8mH
• VC Diameter 50mm
• Winding height HVC 10mm
• Winding material Aluminum
• Former material Kapton

Magnet

• Flux density B 1.15T
• Force factor Bl 14.6N/A
• Motor constant Bl/√RE 4.21N/√W
• Air gap height HAG 8mm
• Weight 1.45kg
• Material Ferrite

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 28.3g
• Moving mass (without air load) MMD 20.4g
• Material Paper

Suspensions

• Stiffness KMS 9.71N/mm
• Compliance CMS 103µm/N
• Equivalent volume to the compliance VAS 35.3L
• Mechanical resistance RMS 1.14N·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