Jensen Vintage Ceramic C8R

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 126Hz
• Mechanical quality factor QMS 10.29
• Electrical quality factor QES 2.18
• Total quality factor QTS 1.80

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 6.7Ω
• Inductance (1kHz) LE 0.43mH
• VC Diameter 25mm
• Winding height HVC 4mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1T
• Force factor Bl 4.7N/A
• Motor constant Bl/√RE 1.81N/√W
• Air gap height HAG 6mm
• Weight 0.27kg
• Material Ferrite

Diaphragm

• Effective diameter 165mm
• Effective area SD 214cm²
• Moving mass MMS 9g
• Moving mass (without air load) MMD 6.7g
• Material Paper

Suspensions

• Stiffness KMS 5.68N/mm
• Compliance CMS 176µm/N
• Equivalent volume to the compliance VAS 11.4L
• Mechanical resistance RMS 0.69N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 8″
• 207mm
• Overall diameter 207mm
• Volume occupied by the driver (estimated) 0.4L
• Net weight 1.0kg
• Frame material Pressed Sheet