Jensen D-Series C12D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 99.2dB

Thiele & Small parameters

• Resonance frequency (free air) fS 62.3Hz
• Mechanical quality factor QMS 4.26
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.40

Large signal parameters

• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 0.27mH
• VC Diameter 50mm
• Winding height HVC 10mm
• Winding material Copper
• Former material Aluminum

Magnet

• Flux density B 1.1T
• Force factor Bl 12.3N/A
• Motor constant Bl/√RE 5.32N/√W
• Air gap height HAG 8mm
• Weight 1.45kg
• Material Ferrite

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 32g
• Moving mass (without air load) MMD 24.1g
• Material Paper

Suspensions

• Stiffness KMS 4.9N/mm
• Compliance CMS 204µm/N
• Equivalent volume to the compliance VAS 69.6L
• Mechanical resistance RMS 2.94N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 12″
• 307mm
• Overall diameter 307mm
• Volume occupied by the driver (estimated) 2L
• Net weight 4.6kg
• Frame material Pressed Sheet