Sealed 22.7 L
Manufacturer external dimensions (width × height × depth): 510 × 406 × 160 mm.
Panel thickness: 16 mm.
Follow the original construction and damping instructions.
Hertz / SUBWOOFER
Hertz MPS 300 S4 — specifications and enclosures
Hertz MPS 300 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
Bass-reflex 36.8 L
Tuning Fb: 33 Hz.
Manufacturer external dimensions (width × height × depth): 836 × 422 × 165 mm.
Manufacturer port: shape: slot, width: 133 mm, height: 60 mm, length: 460 mm.
Panel thickness: 16 mm.
Follow the original construction and damping instructions.
Calculator parameters
| Fs | 23.0 Hz |
|---|---|
| Vas | 62.13 L |
| Qes | 0.45 |
| Qms | 6.3 |
| Re | 3.4 Ω |
| Sd | 541.56 cm² |
| Le | 3.75 mH |
| One-way linear Xmax | Not provided / unverified |
| Frame diameter | 31.83 cm |
| Mounting cutout | 28.25 cm |
| Mounting depth | 8.8 cm |
Additional manufacturer specifications
| Published Qts | 0.42 |
|---|---|
| Published Xmax (definition to verify) | 16.8 mm |
| Mms | 320 g |
| Cms | 0.15 mm/N |
| BL | 18.7 T·m |
| Spl | 85 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.