Eighteen Sound 18LW2500

Subwoofer

Nominal diameter18″ / 462 mm
Resonance34 Hz
Q factor0.33
Sensitivity93.6 dB
Linear excursion± 14 mm
Program Power3200 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 93.6dB
  • Frequency response 30 - 1000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 34Hz
  • Mechanical quality factor QMS 22.00
  • Electrical quality factor QES 0.34
  • Total quality factor QTS 0.33

Large signal parameters

  • Maximum linear excursion xmax 14mm
  • Maximum excursion before damage xlim 35mm
  • Air volume displaced at xmax VD 1582cm³
  • Power handling P 1600W
  • Program power Pmax 3200W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 4.9Ω
  • Inductance (1kHz) LE 2.87mH
  • VC Diameter 100mm
  • Winding material Copper

Magnet

  • Force factor Bl 30N/A
  • Motor constant Bl/√RE 13.6N/√W
  • Material Ferrite

Diaphragm

  • Effective diameter 379mm
  • Effective area SD 1130cm²
  • Moving mass MMS 290g
  • Moving mass (without air load) MMD 263g
  • Material Curved ribbed fiber loaded cellulose

Suspensions

  • Stiffness KMS 13.3N/mm
  • Compliance CMS 75µm/N
  • Equivalent volume to the compliance VAS 135L
  • Mechanical resistance RMS 2.82N·s/m
  • Surround material Triple roll, Heavy Polycotton

Dimensions

  • Nominal diameter 18
  • 462mm
  • Overall diameter 462mm
  • Baffle cutout diameter 422mm
  • Overall depth 234mm
  • Flange thickness 26mm
  • Mounting depth 208mm
  • Volume occupied by the driver (estimated) 9.1L
  • Net weight 16.7kg
Eighteen Sound 18LW2500 Impedance
Eighteen Sound 18LW2500 SPL
Eighteen Sound 18LW2500 Dimensions

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