Eighteen Sound 12MB600 8Ω

Woofer

Nominal diameter12″ / 315 mm
Resonance44 Hz
Q factor0.18
Sensitivity98.1 dB
Linear excursion± 4.5 mm
Program Power600 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 98.1dB
  • Frequency response 58 - 5000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 44Hz
  • Mechanical quality factor QMS 3.90
  • Electrical quality factor QES 0.19
  • Total quality factor QTS 0.18

Large signal parameters

  • Maximum linear excursion xmax 4.5mm
  • Air volume displaced at xmax VD 239cm³
  • Power handling P 450W
  • Program power Pmax 600W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.0Ω
  • Inductance (1kHz) LE 1.32mH
  • VC Diameter 75mm

Magnet

  • Force factor Bl 18N/A
  • Motor constant Bl/√RE 8.05N/√W

Diaphragm

  • Effective diameter 260mm
  • Effective area SD 531cm²
  • Moving mass MMS 43g
  • Moving mass (without air load) MMD 34.2g

Suspensions

  • Stiffness KMS 3.29N/mm
  • Compliance CMS 304µm/N
  • Equivalent volume to the compliance VAS 115L
  • Mechanical resistance RMS 3.05N·s/m

Dimensions

  • Nominal diameter 12
  • 315mm
  • Overall diameter 315mm
  • Baffle cutout diameter 282mm
  • Overall depth 147mm
  • Flange thickness 16mm
  • Mounting depth 131mm
  • Volume occupied by the driver (estimated) 3.4L
  • Net weight 8.3kg
Eighteen Sound 12MB600 8Ω Impedance
Eighteen Sound 12MB600 8Ω SPL
Eighteen Sound 12MB600 8Ω Dimensions

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