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
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
95.2
dB
Frequency response
25 - 1000
Hz

Thiele & Small parameters

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

Large signal parameters

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

Voice Coil

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

Magnet

Force factor
Bl
27.6
N/A
Motor constant
Bl/√RE
12.3
N/√W
Air gap height
HAG
15
mm

Diaphragm

Effective diameter
470
mm
Effective area
SD
1730
cm²
Moving mass
MMS
318
g
Moving mass (without air load)
MMD
268.3
g

Suspensions

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

Dimensions

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
RCF LF21N401 Impedance
RCF LF21N401 SPL
RCF LF21N401 Dimensions

Export this driver to a simulation software:

WinISDWinISDBasta!Basta!HornrespHornrespQSpeakersQSpeakersSpeakerSimSpeakerSimMfbLabsMfbLabsSpeakerbenchSpeakerbench

Similar subwoofers to RCF LF21N401

B&C Speaker 21SW115 Subwoofer
21Subwoofer
fS
30 Hz
SD
1680 cm²
30 - 1000 Hz
QTS
0.37
xmax
14.0 mm
SPL1W
95 dB
Bl/√RE
13
Pmax
3400 W
Eminence IMPERO 18A Subwoofer
18Subwoofer
fS
33 Hz
SD
1159 cm²
39 - 800 Hz
QTS
0.43
xmax
8.0 mm
SPL1W
95 dB
Bl/√RE
8.13
Pmax
2400 W