Rockford Fosgate RM112D2

2x2Ω
2x4Ω

Subwoofer

12″ / 305 mm
Nominal diameter
29 Hz
Resonance
0.58
Q factor
88 dB
Sensitivity
± 7 mm
Linear excursion
400 W
Program Power
Rockford Fosgate RM112D2 SubwooferRockford Fosgate RM112D2 SubwooferRockford Fosgate RM112D2 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
88.0
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
28.5
Hz
Mechanical quality factor
QMS
10.06
Electrical quality factor
QES
0.62
Total quality factor
QTS
0.58

Large signal parameters

Maximum linear excursion
xmax
7.0
mm
Air volume displaced at xmax
VD
410
cm³
Power handling
P
200
W
Program power
Pmax
400
W

Voice Coil

Nominal impedance
Z
2 x 2
Ω
DC resistance (in series)
RE
3.7
Ω
Inductance (1kHz, in series)
LE
2.16
mH
VC Diameter
51
mm
Former material
Aluminum

Magnet

Force factor (in series)
Bl
12.3
N/A
Motor constant
Bl/√RE
6.39
N/√W
Weight
1.13
kg

Diaphragm

Effective diameter
273
mm
Effective area
SD
585
cm²
Moving mass
MMS
140.5
g
Moving mass (without air load)
MMD
131.1
g

Suspensions

Stiffness
KMS
4.51
N/mm
Compliance
CMS
222
µm/N
Equivalent volume to the compliance
VAS
108
L
Mechanical resistance
RMS
2.5
N·s/m

Dimensions

Nominal diameter
12
″
305
mm
Baffle cutout diameter
276
mm
Mounting depth
122
mm
Volume occupied by the driver
3.4
L
Impedance
Step response
Tone Burst
DatasheetDatasheet

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