Rockford Fosgate T1D215

2x2Ω
2x4Ω

Subwoofer

15″ / 381 mm
Nominal diameter
26 Hz
Resonance
0.43
Q factor
88 dB
Sensitivity
± 16.4 mm
Linear excursion
2000 W
Program Power
Rockford Fosgate T1D215 SubwooferRockford Fosgate T1D215 SubwooferRockford Fosgate T1D215 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
87.9
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
26.3
Hz
Mechanical quality factor
QMS
6.50
Electrical quality factor
QES
0.46
Total quality factor
QTS
0.43

Large signal parameters

Maximum linear excursion
xmax
16.4
mm
Air volume displaced at xmax
VD
1386
cm³
Power handling
P
1000
W
Program power
Pmax
2000
W

Voice Coil

Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.3
Ω
Inductance (1kHz, in series)
LE
1.6
mH
VC Diameter
76
mm

Magnet

Force factor (in series)
Bl
20.6
N/A
Motor constant
Bl/√RE
11.4
N/√W
Weight
6.49
kg

Diaphragm

Effective diameter
328
mm
Effective area
SD
845
cm²
Moving mass
MMS
362.6
g
Moving mass (without air load)
MMD
345.7
g

Suspensions

Stiffness
KMS
9.9
N/mm
Compliance
CMS
101
µm/N
Equivalent volume to the compliance
VAS
102
L
Mechanical resistance
RMS
9.22
N·s/m

Dimensions

Nominal diameter
15
″
381
mm
Baffle cutout diameter
354
mm
Mounting depth
213
mm
Volume occupied by the driver
5.41
L
Impedance
Step response
Tone Burst
DatasheetDatasheet

Export this driver to a simulation software:

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PowerBass 3XL-1502D Subwoofer
PowerBass  3XL-1502D2 x 2 Ω
15″Subwoofer
fS
24 Hz
SD
855 cm²
25 - 400 Hz
QTS
0.42
xmax
24.0 mm
SPL1W
88 dB
Bl/√RE
11
Pmax
2000 W