PowerBass L-1204D
Subwoofer
12″ / 305 mm
Nominal diameter
30 Hz
Resonance
0.49
Q factor
88 dB
Sensitivity
± 11 mm
Linear excursion
800 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
87.9
dB
Frequency response
30 - 450
Hz
Thiele & Small parameters
Resonance frequency (free air)
fS
30.0
Hz
Mechanical quality factor
QMS
3.70
Electrical quality factor
QES
0.56
Total quality factor
QTS
0.49
Large signal parameters
Maximum linear excursion
xmax
11.0
mm
Air volume displaced at xmax
VD
539
cm³
Power handling
P
400
W
Program power
Pmax
800
W
Voice Coil
Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
6.4
Ω
Inductance (1kHz, in series, estimated)
LE
1.77
mH
VC Diameter
51
mm
Magnet
Force factor (in series)
Bl
19.0
N/A
Motor constant
Bl/√RE
7.51
N/√W
Weight
5.1
kg
Diaphragm
Effective diameter
250
mm
Effective area
SD
490
cm²
Moving mass
MMS
135.7
g
Moving mass (without air load)
MMD
127.9
g
Material
Injection molded Polypropylene
Suspensions
Stiffness
KMS
6.1
N/mm
Compliance
CMS
164
µm/N
Equivalent volume to the compliance
VAS
60.6
L
Mechanical resistance
RMS
6.91
N·s/m
Dimensions
Nominal diameter
12
″
305
mm
Baffle cutout diameter
297
mm
Mounting depth
137
mm
Volume occupied by the driver (estimated)
2.4
L
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SpeakerbenchSimilar subwoofers to PowerBass L-1204D
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12″Subwoofer
fS
33 Hz
SD
552 cm²
33 - 450 Hz
QTS
0.57
xmax
8.5 mm
SPL1W
87 dB
Bl/√RE
7.92
Pmax
800 W