Stereo Integrity HFS-24

2x4Ω

Subwoofer

Nominal diameter24″ / 610 mm
Resonance20.5 Hz
Q factor0.61
Sensitivity89.3 dB
Linear excursion± 25 mm
Program Power7000 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 89.3dB
  • Frequency response 3 - 2000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 20.5Hz
  • Mechanical quality factor QMS 6.34
  • Electrical quality factor QES 0.68
  • Total quality factor QTS 0.61

Large signal parameters

  • Maximum linear excursion (one way) xmax 25mm
  • Maximum excursion before damage xlim 40mm
  • Air volume displaced at xmax VD 5206cm³
  • Power handling P 3500W
  • Program power Pmax 7000W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.7Ω
  • Inductance (1kHz, in series) LE 2.1mH
  • VC Diameter 127mm
  • Winding material Copper

Magnet

  • Force factor (in series) Bl 32.1N/A
  • Motor constant Bl/√RE 12.4N/√W
  • Material Neodymium

Diaphragm

  • Effective diameter 515mm
  • Effective area SD 2083cm²
  • Moving mass MMS 807g
  • Moving mass (without air load) MMD 740g
  • Material Carbon Fiber and Kevlar sandwich

Suspensions

  • Stiffness KMS 14.3N/mm
  • Compliance CMS 70µm/N
  • Equivalent volume to the compliance VAS 450L
  • Mechanical resistance RMS 16.4N·s/m
  • Surround material Treated foam
  • Spider material Nomex

Dimensions

  • Nominal diameter 24
  • 610mm
  • Overall diameter 618mm
  • Baffle cutout diameter 568mm
  • Mounting depth 222mm
  • Volume occupied by the driver 7.08L
  • Net weight 18.144kg
  • Frame material Cast Aluminium

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