Jensen Blackbird P 10/40 BB

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 91.8Hz
• Mechanical quality factor QMS 13.05
• Electrical quality factor QES 1.01
• Total quality factor QTS 0.94

Large signal parameters

• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.47mH
• VC Diameter 32mm
• Winding height HVC 9mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.28T
• Force factor Bl 7.68N/A
• Motor constant Bl/√RE 3.25N/√W
• Air gap height HAG 6mm
• Weight 0.36kg
• Material Reinforced Alnico

Diaphragm

• Effective diameter 205mm
• Effective area SD 330cm²
• Moving mass MMS 18.5g
• Moving mass (without air load) MMD 14.1g
• Material Paper

Suspensions

• Stiffness KMS 6.17N/mm
• Compliance CMS 162µm/N
• Equivalent volume to the compliance VAS 25.1L
• Mechanical resistance RMS 0.82N·s/m
• Surround material Integrated Paper

Dimensions

• Nominal diameter 10″
• 259mm
• Overall diameter 259mm
• Volume occupied by the driver (estimated) 0.69L
• Net weight 1.7kg
• Frame material Pressed Sheet