12″ / 305 mm
Nominal diameter
33 Hz
Resonance
0.57
Q factor
87 dB
Sensitivity
± 8.5 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.4
dB
Frequency response
33 - 450
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
33.0
Hz
Mechanical quality factor
QMS
3.73
Electrical quality factor
QES
0.64
Total quality factor
QTS
0.57
Large signal parameters
Maximum linear excursion
xmax
8.5
mm
Air volume displaced at xmax
VD
469
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
4
Ω
DC resistance
RE
3.5
Ω
Inductance (1kHz, estimated)
LE
1.12
mH
VC Diameter
51
mm
Magnet
Force factor
Bl
14.81
N/A
Motor constant
Bl/√RE
7.92
N/√W
Weight
5.27
kg
Diaphragm
Effective diameter
265
mm
Effective area
SD
552
cm²
Moving mass
MMS
171.9
g
Moving mass (without air load)
MMD
163.1
g
Material
Non Pressed Paper
Suspensions
Stiffness
KMS
7.83
N/mm
Compliance
CMS
128
µm/N
Equivalent volume to the compliance
VAS
55.2
L
Mechanical resistance
RMS
9.56
N·s/m
Dimensions
Nominal diameter
12
″
305
mm
Baffle cutout diameter
281
mm
Mounting depth
145
mm
Volume occupied by the driver (estimated)
2.4
L
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SpeakerbenchSimilar subwoofers to PowerBass XL-1240
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PowerBass XL-1240D2 x 4 Ω
12″Subwoofer
fS
33 Hz
SD
552 cm²
33 - 450 Hz
QTS
0.57
xmax
8.5 mm
SPL1W
87 dB
Bl/√RE
7.57
Pmax
800 W
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Rockford Fosgate RM110D4B2 x 4 Ω
10″Subwoofer
fS
35 Hz
SD
394 cm²
QTS
0.51
xmax
7.0 mm
SPL1W
88 dB
Bl/√RE
6.06
Pmax
400 W
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Rockford Fosgate RM110D42 x 4 Ω
10″Subwoofer
fS
35 Hz
SD
394 cm²
QTS
0.51
xmax
7.0 mm
SPL1W
88 dB
Bl/√RE
6.06
Pmax
400 W