Jensen D-Series N12D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 61Hz
• Mechanical quality factor QMS 2.95
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.39

Large signal parameters

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

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 0.32mH
• VC Diameter 50mm
• Winding height HVC 10mm
• Winding material Copper
• Former material Aluminum

Magnet

• Flux density B 1.36T
• Force factor Bl 11.6N/A
• Motor constant Bl/√RE 5.13N/√W
• Air gap height HAG 8mm
• Weight 0.206kg
• Material Neodymium

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 4.53N/mm
• Compliance CMS 221µm/N
• Equivalent volume to the compliance VAS 75.3L
• 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) 1L
• Net weight 2.4kg
• Frame material Pressed Sheet