STX W.20.300.2x2.MC

2x2Ω
2x4Ω

Subwoofer

Nominal diameter8″ / 200 mm
Resonance33 Hz
Q factor0.39
Sensitivity85.1 dB
Linear excursion± 9 mm
Program power300 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 85.1dB
  • Frequency response 35 - 500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 33Hz
  • Mechanical quality factor QMS 4.50
  • Electrical quality factor QES 0.45
  • Total quality factor QTS 0.39

Large signal parameters

  • Maximum linear excursion (one way) xmax 9mm
  • Maximum excursion before damage xlim 15mm
  • Air volume displaced at xmax VD 193cm³
  • Power handling P 200W
  • Program power Pmax 300W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 3.3Ω
  • Inductance (1kHz, in series) LE 2.01mH
  • VC Diameter 50mm
  • Winding material Miedziany
  • Former material Aluminium

Magnet

  • Force factor (in series) Bl 9.2N/A
  • Motor constant Bl/√RE 5.06N/√W
  • Material Ferryt

Diaphragm

  • Effective diameter 165mm
  • Effective area SD 214cm²
  • Moving mass (including air load) MMS 57g
  • Moving mass MMD 54.7g
  • Material Modyfikowana celuloza

Suspensions

  • Stiffness KMS 2.63N/mm
  • Compliance CMS 380µm/N
  • Equivalent volume to the compliance VAS 26L
  • Mechanical resistance RMS 2.63N·s/m

Dimensions

  • Nominal diameter 8
  • 200mm
  • Overall diameter 210mm
  • Baffle cutout diameter 180mm
  • Overall depth 100mm
  • Volume occupied by the driver (estimated) 0.83L
  • Net weight 2.1kg
  • Frame material Stal
STX W.20.300.2x2.MC SPL
STX W.20.300.2x2.MC Dimensions

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