15″ / 397 mm
Nominal diameter
37 Hz
Resonance
0.25
Q factor
90 dB
Sensitivity
± 34 mm
Linear excursion
9000 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
89.5
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
37.0
Hz
Mechanical quality factor
QMS
7.11
Electrical quality factor
QES
0.25
Total quality factor
QTS
0.25
Large signal parameters
Maximum linear excursion
xmax
34.0
mm
Air volume displaced at xmax
VD
2754
cm³
Power handling
P
4500
W
Program power
Pmax
9000
W
Voice Coil
Nominal impedance
Z
2 x 1
Ω
DC resistance (in series)
RE
1.4
Ω
Inductance (1kHz, in series, estimated)
LE
0.8
mH
Magnet
Force factor (in series)
Bl
19.53
N/A
Motor constant
Bl/√RE
16.5
N/√W
Diaphragm
Effective diameter
321
mm
Effective area
SD
810
cm²
Moving mass
MMS
434
g
Moving mass (without air load)
MMD
417.2
g
Suspensions
Stiffness
KMS
23.81
N/mm
Compliance
CMS
42
µm/N
Equivalent volume to the compliance
VAS
39.1
L
Mechanical resistance
RMS
14.19
N·s/m
Dimensions
Nominal diameter
15
″
397
mm
Overall diameter
397
mm
Baffle cutout diameter
359
mm
Mounting depth
292
mm
Volume occupied by the driver
7.08
L
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SpeakerbenchSimilar subwoofers to Fi Car Audio Delta 15 D1
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Fi Car Audio SP3 15+ D22 x 2 Ω
15″Subwoofer
fS
32 Hz
SD
810 cm²
QTS
0.25
xmax
34.0 mm
SPL1W
91 dB
Bl/√RE
16
Pmax
5000 W
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Fi Car Audio SP3 15+ D12 x 1 Ω
15″Subwoofer
fS
32 Hz
SD
810 cm²
QTS
0.25
xmax
34.0 mm
SPL1W
91 dB
Bl/√RE
16
Pmax
5000 W