B&C Speaker 21IPAL
Subwoofer
21″ / 530 mm
Nominal diameter
37 Hz
Resonance
0.21
Q factor
97 dB
Sensitivity
± 22 mm
Linear excursion
5000 W
Program Power
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Available on (affiliate link)
Amazon.com
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Specifications
Sensitivity (1w, 1m, infinite baffle)
SPL1W
96.6
dB
Frequency response
37 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
37.0
Hz
Mechanical quality factor
QMS
4.90
Electrical quality factor
QES
0.22
Total quality factor
QTS
0.21
Large signal parameters
Maximum linear excursion
xmax
22.0
mm
Air volume displaced at xmax
VD
3696
cm³
Power handling
P
2500
W
Program power
Pmax
5000
W
Voice Coil
Nominal impedance
Z
1
Ω
DC resistance
RE
0.7
Ω
Inductance (1kHz)
LE
0.5
mH
VC Diameter
153
mm
Winding height
HVC
48
mm
Winding material
Aluminium
Former material
Glass Fibre
Magnet
Flux density
B
1.35
T
Force factor
Bl
19.1
N/A
Motor constant
Bl/√RE
22.8
N/√W
Air gap height
HAG
18
mm
Material
Neodymium Inside Slug
Diaphragm
Effective diameter
462
mm
Effective area
SD
1680
cm²
Moving mass
MMS
487
g
Moving mass (without air load)
MMD
438.8
g
Material
Waterproof Both Sides
Suspensions
Stiffness
KMS
26.32
N/mm
Compliance
CMS
38
µm/N
Equivalent volume to the compliance
VAS
155
L
Mechanical resistance
RMS
23.11
N·s/m
Spider material
Silicone
Dimensions
Nominal diameter
21
″
530
mm
Overall diameter
547
mm
Baffle cutout diameter
508
mm
Overall depth
269
mm
Flange thickness
13
mm
Mounting depth
256
mm
Volume occupied by the driver
16.0
L
Net weight
23.0
kg
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SD
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SD
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