Jensen Mod 8-20

Guitar Speaker

Nominal diameter8″ / 207 mm
Resonance119 Hz
Q factor2.24
Sensitivity96.6 dB
Linear excursion± 1 mm
Program Power40 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 96.6dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 119Hz
  • Mechanical quality factor QMS 19.88
  • Electrical quality factor QES 2.52
  • Total quality factor QTS 2.24

Large signal parameters

  • Maximum linear excursion xmax 1mm
  • Air volume displaced at xmax VD 21cm³
  • Power handling P 20W
  • Program power Pmax 40W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 6.5Ω
  • Inductance (1kHz) LE 0.4mH
  • VC Diameter 25mm
  • Winding material Copper
  • Former material Epotex

Magnet

  • Flux density B 1T
  • Force factor Bl 4.45N/A
  • Motor constant Bl/√RE 1.75N/√W
  • Weight 0.16kg
  • Material Ferrite

Diaphragm

  • Effective diameter 165mm
  • Effective area SD 214cm²
  • Moving mass MMS 10.3g
  • Moving mass (without air load) MMD 8g
  • Material Paper

Suspensions

  • Stiffness KMS 5.78N/mm
  • Compliance CMS 173µm/N
  • Equivalent volume to the compliance VAS 11.1L
  • Mechanical resistance RMS 0.39N·s/m
  • Surround material Integrated Paper

Dimensions

  • Nominal diameter 8
  • 207mm
  • Overall diameter 207mm
  • Volume occupied by the driver (estimated) 0.26L
  • Net weight 0.68kg
  • Frame material Pressed Sheet
Jensen Mod 8-20 Dimensions

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