STX W.18.140.4.WMCX
4Ω
8ΩMid Bass
| Nominal diameter | 8″ / 180 mm |
| Resonance | 40 Hz |
| Q factor | 0.37 |
| Sensitivity | 87.8 dB |
| Linear excursion | ± 4 mm |
| Program power | 140 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 87.8dB
- Frequency response 40 - 8000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 40Hz
- Mechanical quality factor QMS 2.61
- Electrical quality factor QES 0.43
- Total quality factor QTS 0.37
Large signal parameters
- Maximum linear excursion (one way) xmax 4mm
- Maximum excursion before damage xlim 9mm
- Air volume displaced at xmax VD 57cm³
- Power handling P 70W
- Program power Pmax 140W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.3Ω
- Inductance (1kHz) LE 0.46mH
- VC Diameter 25mm
- Winding material Copper
- Former material Aluminum
Magnet
- Force factor Bl 5.7N/A
- Motor constant Bl/√RE 3.14N/√W
- Material Ferrite
Diaphragm
- Effective diameter 135mm
- Effective area SD 143cm²
- Moving mass (including air load) MMS 16.5g
- Moving mass MMD 15.2g
- Material Modified cellulose
Suspensions
- Stiffness KMS 1.06N/mm
- Compliance CMS 940µm/N
- Equivalent volume to the compliance VAS 27L
- Mechanical resistance RMS 1.59N·s/m
Dimensions
- Nominal diameter 8″
- 180mm
- Overall diameter 180mm
- Baffle cutout diameter 146mm
- Overall depth 87mm
- Volume occupied by the driver (estimated) 0.4L
- Net weight 0.9kg
- Frame material Plastic (ABS)
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Export this driver to a box design software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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