Jensen Vintage AlNiCo P8R

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 135Hz
• Mechanical quality factor QMS 8.67
• Electrical quality factor QES 3.09
• Total quality factor QTS 2.28

Large signal parameters

• Maximum linear excursion xmax 1mm
• Air volume displaced at xmax VD 21cm³
• Power handling P 25W
• Program power Pmax 50W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.6Ω
• Inductance (1kHz) LE 0.36mH
• VC Diameter 25mm
• Winding height HVC 4mm
• Winding material Copper
• Former material Epotex

Magnet

• Flux density B 0.96T
• Force factor Bl 3.99N/A
• Motor constant Bl/√RE 1.55N/√W
• Air gap height HAG 6mm
• Weight 0.2kg
• Material Alnico

Diaphragm

• Effective diameter 165mm
• Effective area SD 214cm²
• Moving mass MMS 8.8g
• Moving mass (without air load) MMD 6.5g
• Material Paper

Suspensions

• Stiffness KMS 6.29N/mm
• Compliance CMS 159µm/N
• Equivalent volume to the compliance VAS 10.3L
• Mechanical resistance RMS 0.86N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 8″
• 207mm
• Overall diameter 207mm
• Volume occupied by the driver (estimated) 0.48L
• Net weight 1.2kg
• Frame material Pressed Sheet