Fostex FW800HS
Subwoofer
31.5″ / 800 mm
Nominal diameter
25 Hz
Resonance
0.69
Q factor
98 dB
Sensitivity
± 2.3 mm
Linear excursion
450 W
Program Power
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- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 98.4
- dB
- Frequency response
- 25 - 1500
- Hz
- Resonance frequency (free air)
- fS
- 25.0
- Hz
- Mechanical quality factor
- QMS
- 19.22
- Electrical quality factor
- QES
- 0.71
- Total quality factor
- QTS
- 0.69
- Maximum linear excursion
- xmax
- 2.3
- mm
- Air volume displaced at xmax
- VD
- 924
- cm³
- Power handling
- P
- 150
- W
- Program power
- Pmax
- 450
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 6.6
- Ω
- Inductance (1kHz)
- LE
- 0.16
- mH
- VC Diameter
- 99
- mm
- Force factor
- Bl
- 30.25
- N/A
- Motor constant
- Bl/√RE
- 11.8
- N/√W
- Weight
- 2.03
- kg
- Material
- Ferrite
- Effective diameter
- 715
- mm
- Effective area
- SD
- 4015
- cm²
- Moving mass
- MMS
- 692
- g
- Moving mass (without air load)
- MMD
- 523.1
- g
- Stiffness
- KMS
- 15.53
- N/mm
- Compliance
- CMS
- 64
- µm/N
- Equivalent volume to the compliance
- VAS
- 1473.0
- L
- Mechanical resistance
- RMS
- 5.66
- N·s/m
- Nominal diameter
- 31.5
- ″
- 800
- mm
- Overall diameter
- 800
- mm
- Baffle cutout diameter
- 750
- mm
- Overall depth
- 291
- mm
- Volume occupied by the driver (estimated)
- 17.0
- L
- Net weight
- 20.7
- kg
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
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