Jensen Mod 12-50

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.7dB

Thiele & Small parameters

• Resonance frequency (free air) fS 82Hz
• Mechanical quality factor QMS 7.50
• Electrical quality factor QES 1.72
• Total quality factor QTS 1.40

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 74cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.66mH
• VC Diameter 32mm
• Winding material Copper
• Former material Epotex

Magnet

• Flux density B 1.1T
• Force factor Bl 7.43N/A
• Motor constant Bl/√RE 2.96N/√W
• Weight 0.426kg
• Material Ferrite

Diaphragm

• Effective diameter 250mm
• Effective area SD 491cm²
• Moving mass MMS 29.4g
• Moving mass (without air load) MMD 21.6g
• Material Paper

Suspensions

• Stiffness KMS 7.75N/mm
• Compliance CMS 129µm/N
• Equivalent volume to the compliance VAS 43.6L
• Mechanical resistance RMS 2.02N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 12″
• 306mm
• Overall diameter 306mm
• Volume occupied by the driver (estimated) 0.75L
• Net weight 1.84kg
• Frame material Pressed Sheet