Fi Car Audio Q15 D2

2x1Ω
2x2Ω

Subwoofer

15″ / 397 mm
Nominal diameter
31 Hz
Resonance
0.45
Q factor
89 dB
Sensitivity
± 34 mm
Linear excursion
3500 W
Program Power
Fi Car Audio Q15 D2 SubwooferFi Car Audio Q15 D2 SubwooferFi Car Audio Q15 D2 Subwoofer
Excursion
Velocity
SPL
Phase
Group delay
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
88.6
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
30.6
Hz
Mechanical quality factor
QMS
8.29
Electrical quality factor
QES
0.47
Total quality factor
QTS
0.45

Large signal parameters

Maximum linear excursion
xmax
34.0
mm
Air volume displaced at xmax
VD
2754
cm³
Power handling
P
1750
W
Program power
Pmax
3500
W

Voice Coil

Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.6
Ω
Inductance (1kHz, in series, estimated)
LE
1.69
mH

Magnet

Force factor (in series)
Bl
21.4
N/A
Motor constant
Bl/√RE
11.3
N/√W

Diaphragm

Effective diameter
321
mm
Effective area
SD
810
cm²
Moving mass
MMS
319
g
Moving mass (without air load)
MMD
302.2
g

Suspensions

Stiffness
KMS
12.05
N/mm
Compliance
CMS
83
µm/N
Equivalent volume to the compliance
VAS
75.9
L
Mechanical resistance
RMS
7.4
N·s/m

Dimensions

Nominal diameter
15
″
397
mm
Overall diameter
397
mm
Baffle cutout diameter
359
mm
Mounting depth
222
mm
Volume occupied by the driver
2.55
L
Impedance
Step response
Tone Burst

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