Hertz / SUBWOOFER
Hertz CS 250 S4 — specifications and enclosures
Hertz CS 250 S4: T/S parameters, mounting dimensions and manufacturer enclosure recommendations. Read the original PDF and load the driver into the 3D designer.
Sd calculated from manufacturer effective diameter D: π × (D/10)² / 4 cm². One-way linear Xmax is unverified; no excursion limit is assumed.
Manufacturer enclosure recommendations
No ready-to-load manufacturer enclosure is documented. Load the driver parameters to calculate a CarBoxLab starting design.
Calculator parameters
| Fs | 30.0 Hz |
|---|---|
| Vas | 34.5 L |
| Qes | 0.56 |
| Qms | 9.4 |
| Re | 3.6 Ω |
| Sd | 366.44 cm² |
| Le | 3.33 mH |
| One-way linear Xmax | Not provided / unverified |
| Frame diameter | 27.0 cm |
| Mounting cutout | 23.1 cm |
| Mounting depth | 11.5 cm |
Additional manufacturer specifications
| Published Qts | 0.52 |
|---|---|
| Published Xmax (definition to verify) | 12.5 mm |
| Mms | 154 g |
| Cms | 0.18 mm/N |
| BL | 13.7 T·m |
| Spl | 84 dB |
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.