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
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
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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