Acoustic Elegance IB18HT-8

Subwoofer

Nominal diameter18″ / 457 mm
Resonance18.4 Hz
Q factor0.57
Sensitivity90.2 dB
Linear excursion± 18 mm
Program Power1000 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 90.2dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 18.4Hz
  • Mechanical quality factor QMS 5.74
  • Electrical quality factor QES 0.63
  • Total quality factor QTS 0.57

Large signal parameters

  • Maximum linear excursion xmax 18mm
  • Maximum excursion before damage xlim 25mm
  • Air volume displaced at xmax VD 2192cm³
  • Power handling P 500W
  • Program power Pmax 1000W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.6Ω
  • Inductance (1kHz) LE 0.41mH

Magnet

  • Force factor Bl 16N/A
  • Motor constant Bl/√RE 6.76N/√W

Diaphragm

  • Effective diameter 394mm
  • Effective area SD 1218cm²
  • Moving mass MMS 250g
  • Moving mass (without air load) MMD 221g

Suspensions

  • Stiffness KMS 3.33N/mm
  • Compliance CMS 300µm/N
  • Equivalent volume to the compliance VAS 632L
  • Mechanical resistance RMS 5.03N·s/m

Dimensions

  • Nominal diameter 18
  • 457mm
  • Volume occupied by the driver (estimated) 6.9L


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