Jensen Blackbird P 12/40 BB

16Ω

Guitar Speaker

Nominal diameter12″ / 307 mm
Resonance90.1 Hz
Q factor1.63
Sensitivity97.1 dB
Program Power80 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 97.1dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 90.1Hz
  • Mechanical quality factor QMS 13.97
  • Electrical quality factor QES 1.85
  • Total quality factor QTS 1.63

Large signal parameters

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

Voice Coil

  • Nominal impedance Z 16Ω
  • DC resistance RE 12.0Ω
  • Inductance (1kHz) LE 0.72mH
  • VC Diameter 32mm
  • Winding height HVC 9mm
  • Winding material Copper
  • Former material Kapton

Magnet

  • Flux density B 1.28T
  • Force factor Bl 10.1N/A
  • Motor constant Bl/√RE 2.9N/√W
  • Air gap height HAG 6mm
  • Weight 0.3kg
  • Material Reinforced Alnico

Diaphragm

  • Effective diameter 250mm
  • Effective area SD 491cm²
  • Moving mass MMS 27.4g
  • Moving mass (without air load) MMD 19.5g
  • Material Paper

Suspensions

  • Stiffness KMS 8.77N/mm
  • Compliance CMS 114µm/N
  • Equivalent volume to the compliance VAS 39L
  • Mechanical resistance RMS 1.11N·s/m
  • Surround material Integrated Paper

Dimensions

  • Nominal diameter 12
  • 307mm
  • Overall diameter 307mm
  • Volume occupied by the driver (estimated) 0.82L
  • Net weight 2.0kg
  • Frame material Pressed Sheet
Jensen P 12/40 BB Dimensions

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