Celestion TSQ2145
Low frequency
21″ / 530 mm
Nominal diameter
30 Hz
Resonance
0.34
Q factor
94 dB
Sensitivity
± 15 mm
Linear excursion
3600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
94.2
dB
Frequency response
30 - 1000
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
30.0
Hz
Mechanical quality factor
QMS
8.39
Electrical quality factor
QES
0.36
Total quality factor
QTS
0.34
Large signal parameters
Maximum linear excursion
xmax
15.0
mm
Maximum excursion before damage
xlim
40.0
mm
Air volume displaced at xmax
VD
2493
cm³
Power handling
P
1800
W
Program power
Pmax
3600
W
Voice Coil
Nominal impedance
Z
8
Ω
DC resistance
RE
5.0
Ω
Inductance (1kHz)
LE
3.91
mH
VC Diameter
115
mm
Winding height
HVC
36
mm
Winding material
Round copper
Former material
Glass fibre
Magnet
Force factor
Bl
33.8
N/A
Motor constant
Bl/√RE
15.1
N/√W
Air gap height
HAG
12
mm
Material
Neodymium
Diaphragm
Effective diameter
460
mm
Effective area
SD
1662
cm²
Moving mass
MMS
435.2
g
Moving mass (without air load)
MMD
388
g
Material
Glass loaded cellulose, water-resistant
Suspensions
Stiffness
KMS
15.39
N/mm
Compliance
CMS
65
µm/N
Equivalent volume to the compliance
VAS
254
L
Mechanical resistance
RMS
9.77
N·s/m
Surround material
Triple roll, cloth sealed
Dimensions
Nominal diameter
21
″
530
mm
Overall diameter
541
mm
Baffle cutout diameter
505
mm
Overall depth
250
mm
Flange thickness
17
mm
Mounting depth
233
mm
Volume occupied by the driver (estimated)
9.3
L
Net weight
13.8
kg
Frame material
Cast aluminium
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fS
30 Hz
SD
1188 cm²
31 - 200 Hz
QTS
0.34
xmax
8.6 mm
SPL1W
94 dB
Bl/√RE
11
Pmax
2400 W
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21″Subwoofer
fS
31 Hz
SD
1662 cm²
25 - 1500 Hz
QTS
0.34
xmax
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SPL1W
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Bl/√RE
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Pmax
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fS
30 Hz
SD
1734 cm²
30 - 1000 Hz
QTS
0.29
xmax
14.0 mm
SPL1W
96 dB
Bl/√RE
16
Pmax
3200 W