Fostex FF125WK
8Ω
Full-range
| Nominal diameter | 4.5″ / 120 mm |
| Resonance | 67 Hz |
| Q factor | 0.42 |
| Sensitivity | 89.1 dB |
| Linear excursion | ± 1.7 mm |
| Program Power | 50 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 89.1dB
- Frequency response 67 - 22000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 67Hz
- Mechanical quality factor QMS 5.09
- Electrical quality factor QES 0.46
- Total quality factor QTS 0.42
Large signal parameters
- Maximum linear excursion (one way) xmax 1.7mm
- Air volume displaced at xmax VD 11cm³
- Power handling P 16W
- Program power Pmax 50W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 6.7Ω
- Inductance (1kHz) LE 0.044mH
Magnet
- Force factor Bl 5.6N/A
- Motor constant Bl/√RE 2.16N/√W
- Weight 0.388kg
Diaphragm
- Effective diameter 92mm
- Effective area SD 66cm²
- Moving mass MMS 5g
- Moving mass (without air load) MMD 4.6g
Suspensions
- Stiffness KMS 0.867N/mm
- Compliance CMS 1153µm/N
- Equivalent volume to the compliance VAS 7.27L
- Mechanical resistance RMS 0.41N·s/m
Dimensions
- Nominal diameter 4.5″
- 120mm
- Overall diameter 117mm
- Baffle cutout diameter 104mm
- Overall depth 61mm
- Volume occupied by the driver (estimated) 0.24L
- Net weight 0.92kg
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Export this driver to a simulation software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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