Rockford Fosgate T1D212
Subwoofer
12″ / 305 mm
Nominal diameter
28 Hz
Resonance
0.52
Q factor
85 dB
Sensitivity
± 16 mm
Linear excursion
1600 W
Program Power
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Sensitivity (1w, 1m, infinite baffle)
SPL1W
85.2
dB
Thiele & Small parameters
Resonance frequency (free air)
fS
28.0
Hz
Mechanical quality factor
QMS
4.50
Electrical quality factor
QES
0.59
Total quality factor
QTS
0.52
Large signal parameters
Maximum linear excursion
xmax
16.0
mm
Air volume displaced at xmax
VD
877
cm³
Power handling
P
800
W
Program power
Pmax
1600
W
Voice Coil
Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.3
Ω
Inductance (1kHz, in series)
LE
1.8
mH
VC Diameter
76
mm
Magnet
Force factor (in series)
Bl
15.5
N/A
Motor constant
Bl/√RE
8.6
N/√W
Weight
3.49
kg
Diaphragm
Effective diameter
264
mm
Effective area
SD
548
cm²
Moving mass
MMS
246.6
g
Moving mass (without air load)
MMD
237.8
g
Suspensions
Stiffness
KMS
7.63
N/mm
Compliance
CMS
131
µm/N
Equivalent volume to the compliance
VAS
55.8
L
Mechanical resistance
RMS
9.64
N·s/m
Dimensions
Nominal diameter
12
″
305
mm
Baffle cutout diameter
285
mm
Mounting depth
171
mm
Volume occupied by the driver
3.0
L
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SD
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