ESB / SUBWOOFER
ESB SW-6H.25 (2003 series) — specifications and enclosures
ESB SW-6H.25 (2003 series): T/S parameters, mounting dimensions and manufacturer enclosure recommendations. Read the original PDF and load the driver into the 3D designer.
Discontinued series, listed by ESB under 2003 products. Xmax convention is not explicitly defined; confirm one-way excursion before full simulation. Metric drawing dimensions are used. T/S data explicitly refer to parallel-connected coils of one speaker. Keep that coil connection when using Re and Le. Published Cms is inconsistent with the other T/S values. It is retained verbatim in the specification; the calculator derives compliance from Vas/Sd. Verify the source before building.
Manufacturer enclosure recommendations
No ready-to-load manufacturer enclosure is documented. Load the driver parameters to calculate a CarBoxLab starting design.
Calculator parameters
| Fs | 34.09 Hz |
|---|---|
| Vas | 21.1 L |
| Qes | 0.37 |
| Qms | 2.71 |
| Re | 0.85 Ω |
| Sd | 397 cm² |
| Le | 0.964 mH |
| One-way linear Xmax | Not provided / unverified |
| Frame diameter | 27 cm |
| Mounting cutout | 23.8 cm |
| Mounting depth | 14 cm |
Additional manufacturer specifications
| Fs | 34.09 Hz |
|---|---|
| Qes | 0.37 |
| Qms | 2.71 |
| Vas | 21.1 L |
| Re | 0.85 Ω |
| Sd | 397 cm² |
| Le | 0.964 mH |
| Frame diameter | 27 cm |
| Cutout diameter | 23.8 cm |
| Mounting depth | 14 cm |
| Nominal diameter | 250 mm |
| Nominal impedance | 2 + 2 Ω |
| RMS / peak power | 1000 / 2000 W |
| Frequency response | 24–330 Hz |
| Sensitivity 1W/1m | 86.8 dB |
| Published Re | 0.85 Ω |
| Published Le | 0.964 mH |
| Published Xmax, convention unspecified | 22 mm |
| Qts published | 0.32 |
| Mms | 232 g |
| Cms as published | 0.157 mm/N |
| BL as published | 22.94 T/m |
| Additional basket dimension | 255.0 mm |
| T/S coil connection | Parallel |
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
Original manufacturer documents are not translated. Data reviewed: 2026-10-17.