Eighteen Sound 21LW2600
Subwoofer
21″ / 533 mm
Nominal diameter
27 Hz
Resonance
0.33
Q factor
94 dB
Sensitivity
± 14.6 mm
Linear excursion
3200 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.4
dB
Frequency response
35 - 1400
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
27.0
Hz
Mechanical quality factor
QMS
23.10
Electrical quality factor
QES
0.34
Total quality factor
QTS
0.33
Large signal parameters
Maximum linear excursion
xmax
14.6
mm
Air volume displaced at xmax
VD
2424
cm³
Power handling
P
1600
W
Program power
Pmax
3200
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.2
Ω
Inductance (1kHz)
LE
2.67
mH
VC Diameter
100
mm
Magnet
Force factor
Bl
32.5
N/A
Motor constant
Bl/√RE
14.3
N/√W
Material
Ferrite
Diaphragm
Effective diameter
460
mm
Effective area
SD
1660
cm²
Moving mass
MMS
398
g
Moving mass (without air load)
MMD
350.5
g
Material
Weather protected
Suspensions
Stiffness
KMS
11.49
N/mm
Compliance
CMS
87
µm/N
Equivalent volume to the compliance
VAS
333
L
Mechanical resistance
RMS
2.92
N·s/m
Dimensions
Nominal diameter
21
″
533
mm
Overall diameter
545
mm
Baffle cutout diameter
492
mm
Overall depth
245
mm
Flange thickness
18
mm
Mounting depth
227
mm
Volume occupied by the driver (estimated)
11.0
L
Net weight
17.1
kg
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SpeakerbenchSimilar subwoofers to Eighteen Sound 21LW2600
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fS
29 Hz
SD
1660 cm²
30 - 1000 Hz
QTS
0.37
xmax
14.0 mm
SPL1W
94 dB
Bl/√RE
14
Pmax
3200 W
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fS
29 Hz
SD
1660 cm²
30 - 1800 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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fS
28 Hz
SD
1700 cm²
28 - 1000 Hz
QTS
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xmax
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SPL1W
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Bl/√RE
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Pmax
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