STX W.18.220.8.MCX

Woofer

Nominal diameter8″ / 180 mm
Resonance39 Hz
Q factor0.30
Sensitivity88.3 dB
Linear excursion± 6 mm
Program power220 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
  • Frequency response 40 - 8000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 39Hz
  • Mechanical quality factor QMS 1.70
  • Electrical quality factor QES 0.37
  • Total quality factor QTS 0.30

Large signal parameters

  • Maximum linear excursion (one way) xmax 6mm
  • Maximum excursion before damage xlim 15mm
  • Air volume displaced at xmax VD 80cm³
  • Power handling P 110W
  • Program power Pmax 220W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 6.0Ω
  • Inductance (1kHz) LE 0.28mH
  • VC Diameter 35mm
  • Winding material Copper
  • Former material Aluminum

Magnet

  • Force factor Bl 7.6N/A
  • Motor constant Bl/√RE 3.1N/√W
  • Material Ferrite

Diaphragm

  • Effective diameter 130mm
  • Effective area SD 133cm²
  • Moving mass (including air load) MMS 14.5g
  • Moving mass MMD 13.3g
  • Material Modified cellulose

Suspensions

  • Stiffness KMS 0.87N/mm
  • Compliance CMS 1150µm/N
  • Equivalent volume to the compliance VAS 29L
  • Mechanical resistance RMS 2.09N·s/m

Dimensions

  • Nominal diameter 8
  • 180mm
  • Overall diameter 182mm
  • Baffle cutout diameter 150mm
  • Overall depth 88mm
  • Volume occupied by the driver (estimated) 0.66L
  • Net weight 1.9kg
  • Frame material Aluminium
STX W.18.220.8.MCX SPL
STX W.18.220.8.MCX Dimensions

Similar woofers to STX W.18.220.8.MCX

REDCATT 6FHM Mid Bass

REDCATT 6FHM

8 Ω
6Mid Bass
fS36 Hz
SD133 cm²
QTS0.29
xmax4.4 mm
SPL1W88.2 dB
Bl/√RE3.77
Pmax80 W