Eighteen Sound 12ND830 8Ω

4Ω
8Ω

Subwoofer

Nominal diameter12″ / 300 mm
Resonance55 Hz
Q factor0.28
Sensitivity97 dB
Linear excursion± 6.5 mm
Program power700 W
Eighteen Sound 12ND830 8Ω SubwooferEighteen Sound 12ND830 8Ω SubwooferEighteen Sound 12ND830 8Ω Subwoofer
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 97dB
  • Frequency response 53 - 5000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 55Hz
  • Mechanical quality factor QMS 5.15
  • Electrical quality factor QES 0.30
  • Total quality factor QTS 0.28

Large signal parameters

  • Maximum linear excursion (one way) xmax 6.5mm
  • Air volume displaced at xmax VD 345cm³
  • Power handling P 450W
  • Program power Pmax 700W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.7Ω
  • Inductance (1kHz) LE 1.5mH
  • VC Diameter 75mm
  • Winding material Aluminum

Magnet

  • Force factor Bl 17.6N/A
  • Motor constant Bl/√RE 7.37N/√W
  • Material Neodymium

Diaphragm

  • Effective diameter 260mm
  • Effective area SD 531cm²
  • Moving mass (including air load) MMS 46g
  • Moving mass MMD 37.2g
  • Material Weather protected

Suspensions

  • Stiffness KMS 5.5N/mm
  • Compliance CMS 182µm/N
  • Equivalent volume to the compliance VAS 72L
  • Mechanical resistance RMS 3.09N·s/m

Dimensions

  • Nominal diameter 12″
  • 300mm
  • Overall diameter 315mm
  • Baffle cutout diameter 282mm
  • Overall depth 140mm
  • Flange thickness 9mm
  • Mounting depth 131mm
  • Volume occupied by the driver (estimated) 2.1L
  • Net weight 4.3kg
Impedance
SPL
Eighteen Sound 12ND830 8Ω Impedance
Eighteen Sound 12ND830 8Ω SPL
Eighteen Sound 12ND830 8Ω Dimensions
PDF fileDatasheet

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