Rockford Fosgate R1S4-12
4Ω
Subwoofer
Nominal diameter | 12″ / 319 mm |
Resonance | 30.5 Hz |
Q factor | 0.54 |
Sensitivity | 88.4 dB |
Linear excursion | ± 7 mm |
Program Power | 400 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 88.4dB
Thiele & Small parameters
- Resonance frequency (free air) fS 30.5Hz
- Mechanical quality factor QMS 7.97
- Electrical quality factor QES 0.58
- Total quality factor QTS 0.54
Large signal parameters
- Maximum linear excursion xmax 7mm
- Air volume displaced at xmax VD 372cm³
- Power handling P 200W
- Program power Pmax 400W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.5Ω
- Inductance (1kHz) LE 2.1mH
- VC Diameter 51mm
Magnet
- Force factor Bl 11.8N/A
- Motor constant Bl/√RE 6.31N/√W
- Weight 1.13kg
Diaphragm
- Effective diameter 260mm
- Effective area SD 531cm²
- Moving mass MMS 121g
- Moving mass (without air load) MMD 112g
Suspensions
- Stiffness KMS 4.43N/mm
- Compliance CMS 226µm/N
- Equivalent volume to the compliance VAS 90.4L
- Mechanical resistance RMS 2.9N·s/m
Dimensions
- Nominal diameter 12″
- 319mm
- Overall diameter 319mm
- Baffle cutout diameter 285mm
- Mounting depth 125mm
- Volume occupied by the driver 2.83L
Export this driver to a simulation software:
Closed Box Simulator·





