Focal AUDITOR RSB 250
Subwoofer
10″ / 271 mm
Nominal diameter
29 Hz
Resonance
0.59
Q factor
84 dB
Sensitivity
500 W
Program Power
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- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 84.3
- dB
- Frequency response
- 35 - 500
- Hz
- Resonance frequency (free air)
- fS
- 29.0
- Hz
- Mechanical quality factor
- QMS
- 4.70
- Electrical quality factor
- QES
- 0.68
- Total quality factor
- QTS
- 0.59
- Power handling
- P
- 250
- W
- Program power
- Pmax
- 500
- W
- Nominal impedance
- Z
- 2 x 4
- Ω
- DC resistance (in series)
- RE
- 6.4
- Ω
- Inductance (1kHz, in series, estimated)
- LE
- 1.41
- mH
- VC Diameter
- 50
- mm
- Force factor (in series)
- Bl
- 13.4
- N/A
- Motor constant
- Bl/√RE
- 5.3
- N/√W
- Diameter
- 140
- mm
- Effective diameter
- 198
- mm
- Effective area
- SD
- 307
- cm²
- Moving mass
- MMS
- 93
- g
- Moving mass (without air load)
- MMD
- 88.8
- g
- Material
- Polypropylene
- Stiffness
- KMS
- 3.33
- N/mm
- Compliance
- CMS
- 300
- µm/N
- Equivalent volume to the compliance
- VAS
- 42
- L
- Mechanical resistance
- RMS
- 3.61
- N·s/m
- Surround material
- Butyl
- Nominal diameter
- 10
- ″
- 271
- mm
- Overall diameter
- 271
- mm
- Baffle cutout diameter
- 233
- mm
- Mounting depth
- 117
- mm
- Volume occupied by the driver (estimated)
- 1.4
- L
- Net weight
- 3.4
- kg
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
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