Jensen Vintage Ceramic C12K-2

16Ω

Guitar Speaker

Nominal diameter12″ / 307 mm
Resonance85 Hz
Q factor0.59
Sensitivity98.5 dB
Program Power200 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 98.5dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 85Hz
  • Mechanical quality factor QMS 12.07
  • Electrical quality factor QES 0.62
  • Total quality factor QTS 0.59

Large signal parameters

  • Power handling P 100W
  • Program power Pmax 200W

Voice Coil

  • Nominal impedance Z 16Ω
  • DC resistance RE 12.0Ω
  • Inductance (1kHz) LE 1.21mH
  • VC Diameter 50mm
  • Winding height HVC 10mm
  • Winding material Copper
  • Former material Nomex

Magnet

  • Flux density B 1.15T
  • Force factor Bl 17.2N/A
  • Motor constant Bl/√RE 4.96N/√W
  • Air gap height HAG 8mm
  • Weight 1.45kg
  • Material Ferrite

Diaphragm

  • Effective diameter 250mm
  • Effective area SD 491cm²
  • Moving mass MMS 28.5g
  • Moving mass (without air load) MMD 20.6g
  • Material Paper

Suspensions

  • Stiffness KMS 8.13N/mm
  • Compliance CMS 123µm/N
  • Equivalent volume to the compliance VAS 42.1L
  • Mechanical resistance RMS 1.26N·s/m
  • Surround material Integrated Paper

Dimensions

  • Nominal diameter 12
  • 307mm
  • Overall diameter 307mm
  • Volume occupied by the driver (estimated) 1.8L
  • Net weight 4.3kg
  • Frame material Pressed Sheet
Jensen C12K-2 Dimensions

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