SICA 18 PFS 4

Subwoofer

Nominal diameter18″ / 463 mm
Resonance29 Hz
Q factor0.33
Sensitivity93.6 dB
Linear excursion± 9 mm
Program Power2400 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 - 2000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 29Hz
  • Mechanical quality factor QMS 5.30
  • Electrical quality factor QES 0.35
  • Total quality factor QTS 0.33

Large signal parameters

  • Maximum linear excursion xmax 9mm
  • Air volume displaced at xmax VD 1048cm³
  • Power handling P 1200W
  • Program power Pmax 2400W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.1Ω
  • Inductance (1kHz) LE 1.38mH
  • VC Diameter 100mm
  • Winding height HVC 12mm
  • Winding material Copper
  • Former material Glass Fiber

Magnet

  • Flux density B 1.05T
  • Force factor Bl 19.7N/A
  • Motor constant Bl/√RE 11.2N/√W
  • Weight 3.3kg
  • Material Ferrite

Diaphragm

  • Effective diameter 385mm
  • Effective area SD 1164cm²
  • Moving mass MMS 238g
  • Moving mass (without air load) MMD 210g
  • Material Paper

Suspensions

  • Stiffness KMS 7.94N/mm
  • Compliance CMS 126µm/N
  • Equivalent volume to the compliance VAS 242L
  • Mechanical resistance RMS 8.19N·s/m
  • Surround material Treated Cloth

Dimensions

  • Nominal diameter 18
  • 463mm
  • Overall diameter 462mm
  • Baffle cutout diameter 417mm
  • Overall depth 210mm
  • Volume occupied by the driver (estimated) 7.2L
  • Net weight 13.0kg
  • Frame material Aluminium Die-Cast
SICA 18 PFS 4 SPL & Impedance
SICA 18 PFS 4 Dimensions

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