Jensen D-Series N12D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 62.5Hz
• Mechanical quality factor QMS 3.30
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.37

Large signal parameters

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

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 0.22mH
• VC Diameter 50mm
• Winding height HVC 10mm
• Winding material Copper
• Former material Aluminum

Magnet

• Flux density B 1.36T
• Force factor Bl 10.1N/A
• Motor constant Bl/√RE 5.75N/√W
• Air gap height HAG 8mm
• Weight 0.206kg
• Material Neodymium

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 34.8g
• Moving mass (without air load) MMD 26.9g
• Material Paper

Suspensions

• Stiffness KMS 5.38N/mm
• Compliance CMS 186µm/N
• Equivalent volume to the compliance VAS 63.8L
• Mechanical resistance RMS 4.14N·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