RCF LF21N401
Subwoofer
21″ / 533 mm
Nominal diameter
30 Hz
Resonance
0.37
Q factor
95 dB
Sensitivity
± 11 mm
Linear excursion
3000 W
Program Power
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- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 95.2
- dB
- Frequency response
- 25 - 1000
- Hz
- Resonance frequency (free air)
- fS
- 30.0
- Hz
- Mechanical quality factor
- QMS
- 6.80
- Electrical quality factor
- QES
- 0.40
- Total quality factor
- QTS
- 0.37
- Maximum linear excursion
- xmax
- 11.0
- mm
- Maximum excursion before damage
- xlim
- 30.0
- mm
- Air volume displaced at xmax
- VD
- 1903
- cm³
- Power handling
- P
- 1500
- W
- Program power
- Pmax
- 3000
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.0
- Ω
- Inductance (1kHz)
- LE
- 1.7
- mH
- VC Diameter
- 102
- mm
- Winding height
- HVC
- 31
- mm
- Winding material
- Copper
- Force factor
- Bl
- 27.6
- N/A
- Motor constant
- Bl/√RE
- 12.3
- N/√W
- Air gap height
- HAG
- 15
- mm
- Effective diameter
- 470
- mm
- Effective area
- SD
- 1730
- cm²
- Moving mass
- MMS
- 318
- g
- Moving mass (without air load)
- MMD
- 268.3
- g
- Stiffness
- KMS
- 11.49
- N/mm
- Compliance
- CMS
- 87
- µm/N
- Equivalent volume to the compliance
- VAS
- 374
- L
- Mechanical resistance
- RMS
- 8.81
- N·s/m
- Spider material
- with silicon damping
- Nominal diameter
- 21
- ″
- 533
- mm
- Overall diameter
- 547
- mm
- Baffle cutout diameter
- 512
- mm
- Overall depth
- 234
- mm
- Volume occupied by the driver
- 6.5
- L
- Net weight
- 9.2
- kg
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
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Export this driver to a simulation software:
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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