21″ / 530 mm
Nominal diameter
30 Hz
Resonance
0.23
Q factor
96 dB
Sensitivity
± 15 mm
Linear excursion
3400 W
Program Power
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.2
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
30.0
Hz
Mechanical quality factor
QMS
10.00
Electrical quality factor
QES
0.24
Total quality factor
QTS
0.23
Large signal parameters
Maximum linear excursion
xmax
15.0
mm
Air volume displaced at xmax
VD
2520
cm³
Power handling
P
1700
W
Program power
Pmax
3400
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.1
Ω
Inductance (1kHz)
LE
4.6
mH
VC Diameter
116
mm
Winding height
HVC
36
mm
Winding material
Aluminium
Former material
Glass Fibre
Magnet
Flux density
B
0.8
T
Force factor
Bl
40.8
N/A
Motor constant
Bl/√RE
18.1
N/√W
Air gap height
HAG
14
mm
Material
Neodymium Inside Slug
Diaphragm
Effective diameter
462
mm
Effective area
SD
1680
cm²
Moving mass
MMS
407
g
Moving mass (without air load)
MMD
358.8
g
Material
Waterproof Both Sides
Suspensions
Stiffness
KMS
14.71
N/mm
Compliance
CMS
68
µm/N
Equivalent volume to the compliance
VAS
269
L
Mechanical resistance
RMS
7.67
N·s/m
Spider material
Silicone
Dimensions
Nominal diameter
21
″
530
mm
Overall diameter
547
mm
Baffle cutout diameter
508
mm
Overall depth
255
mm
Flange thickness
13
mm
Mounting depth
242
mm
Volume occupied by the driver
15.0
L
Net weight
14.7
kg
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fS
30 Hz
SD
1680 cm²
30 - 1000 Hz
QTS
0.21
xmax
15.0 mm
SPL1W
97 dB
Bl/√RE
19
Pmax
3400 W
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.jpg.webp)
RCF LF18Y4088 Ω
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fS
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SD
1200 cm²
30 - 1000 Hz
QTS
0.26
xmax
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SPL1W
96 dB
Bl/√RE
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Pmax
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