Stereo Integrity HST-18

2x1Ω

Subwoofer

Nominal diameter18″ / 467 mm
Resonance20.5 Hz
Q factor0.37
Sensitivity88.3 dB
Linear excursion± 40 mm
Program Power4000 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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 88.3dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 20.5Hz
  • Mechanical quality factor QMS 4.89
  • Electrical quality factor QES 0.40
  • Total quality factor QTS 0.37

Large signal parameters

  • Maximum linear excursion (one way) xmax 40mm
  • Maximum excursion before damage xlim 51mm
  • Air volume displaced at xmax VD 4712cm³
  • Power handling P 2000W
  • Program power Pmax 4000W

Voice Coil

  • Nominal impedance Z 2 x 1Ω
  • DC resistance (in series) RE 1.5Ω
  • Inductance (1kHz, in series) LE 1.2mH
  • Winding material Copper

Magnet

  • Force factor (in series) Bl 16.6N/A
  • Motor constant Bl/√RE 13.6N/√W
  • Diameter 254mm

Diaphragm

  • Effective diameter 387mm
  • Effective area SD 1178cm²
  • Moving mass MMS 568g
  • Moving mass (without air load) MMD 539g
  • Material Carbon Fiber

Suspensions

  • Stiffness KMS 9.42N/mm
  • Compliance CMS 106µm/N
  • Equivalent volume to the compliance VAS 210L
  • Mechanical resistance RMS 15N·s/m
  • Surround material Foam
  • Spider material Nomex

Dimensions

  • Nominal diameter 18
  • 467mm
  • Overall diameter 467mm
  • Baffle cutout diameter 432mm
  • Mounting depth 330mm
  • Volume occupied by the driver (estimated) 20L
  • Net weight 40.82kg
  • Frame material Cast Aluminium
Stereo Integrity HST-18 Force factor
Stereo Integrity HST-18 Stiffness

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