Eighteen Sound 8NMB750 16Ω

16Ω

Woofer

Nominal diameter8″ / 225 mm
Resonance91 Hz
Q factor0.37
Sensitivity94.2 dB
Linear excursion± 6.3 mm
Program Power700 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 94.2dB
  • Frequency response 56 - 7000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 91Hz
  • Mechanical quality factor QMS 5.90
  • Electrical quality factor QES 0.39
  • Total quality factor QTS 0.37

Large signal parameters

  • Maximum linear excursion xmax 6.3mm
  • Air volume displaced at xmax VD 145cm³
  • Power handling P 350W
  • Program power Pmax 700W

Voice Coil

  • Nominal impedance Z 16Ω
  • DC resistance RE 10.2Ω
  • Inductance (1kHz) LE 0.3mH
  • VC Diameter 75mm

Magnet

  • Force factor Bl 21.5N/A
  • Motor constant Bl/√RE 6.73N/√W
  • Material Neodymium

Diaphragm

  • Effective diameter 171mm
  • Effective area SD 230cm²
  • Moving mass MMS 30g
  • Moving mass (without air load) MMD 27.3g
  • Material Water,UV repellent

Suspensions

  • Stiffness KMS 9.8N/mm
  • Compliance CMS 102µm/N
  • Equivalent volume to the compliance VAS 7.3L
  • Mechanical resistance RMS 2.91N·s/m

Dimensions

  • Nominal diameter 8
  • 225mm
  • Overall diameter 225mm
  • Baffle cutout diameter 186mm
  • Overall depth 105mm
  • Flange thickness 11mm
  • Mounting depth 94mm
  • Volume occupied by the driver (estimated) 1.2L
  • Net weight 3.5kg
Eighteen Sound 8NMB750 16Ω Impedance
Eighteen Sound 8NMB750 16Ω SPL
Eighteen Sound 8NMB750 16Ω Dimensions

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