Jensen Punch BP 8/150

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.2dB

Thiele & Small parameters

• Resonance frequency (free air) fS 74.7Hz
• Mechanical quality factor QMS 3.61
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 3.1mm
• Maximum excursion before damage xlim 6.6mm
• Air volume displaced at xmax VD 66cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 0.71mH
• VC Diameter 50mm
• Winding height HVC 11mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.1T
• Force factor Bl 13.3N/A
• Motor constant Bl/√RE 5.39N/√W
• Air gap height HAG 10mm
• Weight 1.1kg
• Material Ferrite

Diaphragm

• Effective diameter 165mm
• Effective area SD 214cm²
• Moving mass MMS 22.4g
• Moving mass (without air load) MMD 20.1g
• Material Paper

Suspensions

• Stiffness KMS 4.93N/mm
• Compliance CMS 203µm/N
• Equivalent volume to the compliance VAS 13.1L
• Mechanical resistance RMS 2.91N·s/m
• Surround material Treated Cloth

Dimensions

• Nominal diameter 8″
• 209mm
• Overall diameter 209mm
• Volume occupied by the driver (estimated) 1.3L
• Net weight 3.1kg
• Frame material Pressed Sheet