RCF LF21X451
Subwoofer
21″ / 533 mm
Nominal diameter
28 Hz
Resonance
0.37
Q factor
95 dB
Sensitivity
± 14 mm
Linear excursion
4000 W
Program Power
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- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 94.7
- dB
- Frequency response
- 28 - 1000
- Hz
- Resonance frequency (free air)
- fS
- 28.0
- Hz
- Mechanical quality factor
- QMS
- 6.90
- Electrical quality factor
- QES
- 0.39
- Total quality factor
- QTS
- 0.37
- Maximum linear excursion
- xmax
- 14.0
- mm
- Maximum excursion before damage
- xlim
- 27.0
- mm
- Air volume displaced at xmax
- VD
- 2380
- cm³
- Power handling
- P
- 2000
- W
- Program power
- Pmax
- 4000
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.4
- Ω
- Inductance (1kHz)
- LE
- 2.9
- mH
- VC Diameter
- 114
- mm
- Winding height
- HVC
- 34
- mm
- Winding material
- Copper
- Former material
- Glass Fiber
- Force factor
- Bl
- 30.5
- N/A
- Motor constant
- Bl/√RE
- 13.1
- N/√W
- Air gap height
- HAG
- 15
- mm
- Effective diameter
- 470
- mm
- Effective area
- SD
- 1700
- cm²
- Moving mass
- MMS
- 355
- g
- Moving mass (without air load)
- MMD
- 306.1
- g
- Stiffness
- KMS
- 11.77
- N/mm
- Compliance
- CMS
- 85
- µm/N
- Equivalent volume to the compliance
- VAS
- 385
- L
- Mechanical resistance
- RMS
- 9.05
- N·s/m
- Spider material
- with silicon damping
- Nominal diameter
- 21
- ″
- 533
- mm
- Overall diameter
- 547
- mm
- Baffle cutout diameter
- 512
- mm
- Overall depth
- 245
- mm
- Volume occupied by the driver
- 6.5
- L
- Net weight
- 15.5
- 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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