ESB / SUBWOOFER
ESB BM SUB 200 (SEP 25) — specifications and enclosures
ESB BM SUB 200 (SEP 25): T/S parameters, mounting dimensions and manufacturer enclosure recommendations. Read the original PDF and load the driver into the 3D designer.
Vehicle-specific 2-ohm BMW subwoofer; distinct from the older BMW SUB (NOV 19). Le and Xmax are not published. The irregular frame, mounting tabs and connector require a vehicle-specific mounting template. The 202.3 mm drawing dimension is not a circular cutout diameter. Geometric calculation fields remain blank. T/S enclosure suggestions are theoretical comparisons, not a manufacturer recommendation to replace the original vehicle enclosure. Check vehicle compatibility in the source sheet dated SEP 25.
Manufacturer enclosure recommendations
No ready-to-load manufacturer enclosure is documented. Load the driver parameters to calculate a CarBoxLab starting design.
Calculator parameters
| Fs | 66.2 Hz |
|---|---|
| Vas | 10.93 L |
| Qes | 0.929 |
| Qms | 2.739 |
| Re | 1.8 Ω |
| Sd | 271.72 cm² |
| Le | Not provided / unverified |
| One-way linear Xmax | Not provided / unverified |
| Frame diameter | Not provided / unverified |
| Mounting cutout | Not provided / unverified |
| Mounting depth | Not provided / unverified |
Additional manufacturer specifications
| Fs (Hz) | 66.2 |
|---|---|
| Qes | 0.929 |
| Qms | 2.739 |
| Qts | 0.694 |
| Vas (L) | 10.93 |
| Re (Ω) | 1.8 |
| Sd (cm²) | 271.72 |
| Mms (g) | 55.432 |
| Cms (mm/N) | 0.104 |
| BL (N/A) | 6.684 |
| Nominal size | 8 in / 200 mm |
| Nominal impedance | 2 Ω |
| Continuous / peak power | 100 / 200 W |
| Frequency response | 65 Hz–3 kHz |
| Sensitivity at 1 W / 1 m | 88 dB |
| Sensitivity at 2.83 V / 1 m, as published | 91 dB |
| Reference efficiency | 0.330% |
| Magnet | Y35 ferrite / ferryt |
| Drawing dimensions; not a cutting template | 202.3 / 56.7 / 53.7 / 31 mm |
| Vehicle compatibility | BMW / MINI — see source PDF (SEP 25) |
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: 2026-10-18.