Rockford Fosgate / SUBWOOFER
Rockford Fosgate RFP-408 — specifications and enclosures
Rockford Fosgate RFP-408: T/S parameters, mounting dimensions and manufacturer enclosure recommendations. Read the original PDF and load the driver into the 3D designer.
Archived data sheet. Electrical coil connection and mounting dimensions require verification before electrical simulation and construction. No separately verified enclosure preset is included in this entry. Consult the linked manufacturer PDF; calculator suggestions are separate from manufacturer recommendations.
Manufacturer enclosure recommendations
No ready-to-load manufacturer enclosure is documented. Load the driver parameters to calculate a CarBoxLab starting design.
Calculator parameters
| Fs | 42.0 Hz |
|---|---|
| Vas | 22.5 L |
| Qes | 0.37 |
| Qms | 4.3 |
| Re | 3.4 Ω |
| Sd | 220 cm² |
| Le | 1.64 mH |
| One-way linear Xmax | 6.7 mm |
| Frame diameter | 20.8 cm |
| Mounting cutout | 17.7 cm |
| Mounting depth | 9.45 cm |
Additional manufacturer specifications
| Published Qts | 0.34 |
|---|
Data is for one subwoofer. Manufacturer recommendations are separate from CarBoxLab calculations. Net air volume excludes the driver, port and bracing; design dimensions are external. Loading a recommendation transfers the verified volume and tuning; confirm port geometry and construction separately.
Source documentation
Manufacturer technical documentation
Original manufacturer documents are not translated. Data reviewed: 2026-10-31.