Jensen Mod 8-20

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 111Hz
• Mechanical quality factor QMS 19.23
• Electrical quality factor QES 1.91
• Total quality factor QTS 1.74

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 32cm³
• Power handling P 20W
• Program power Pmax 40W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.3Ω
• Inductance (1kHz) LE 0.3mH
• VC Diameter 25mm
• Winding material Copper
• Former material Epotex

Magnet

• Flux density B 1T
• Force factor Bl 3.47N/A
• Motor constant Bl/√RE 1.92N/√W
• Weight 0.16kg
• Material Ferrite

Diaphragm

• Effective diameter 165mm
• Effective area SD 214cm²
• Moving mass MMS 10.1g
• Moving mass (without air load) MMD 7.8g
• Material Paper

Suspensions

• Stiffness KMS 4.9N/mm
• Compliance CMS 204µm/N
• Equivalent volume to the compliance VAS 13.1L
• Mechanical resistance RMS 0.37N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 8″
• 207mm
• Overall diameter 207mm
• Volume occupied by the driver (estimated) 0.26L
• Net weight 0.68kg
• Frame material Pressed Sheet