ESB / SUBWOOFER
ESB BMW SUB (NOV 19) — specifications and enclosures
ESB BMW SUB (NOV 19): T/S parameters, mounting dimensions and manufacturer enclosure recommendations. Read the original PDF and load the driver into the 3D designer.
Vehicle-specific BMW subwoofer. Le is absent. The mounting tabs extend beyond the nominal circular frame, and the source does not specify a cutting-hole diameter. Geometric fields stay blank; use a verified adapter/template rather than a circular-hole plan. Overall table depth 58 mm differs from the drawing sum 26 + 33 mm. Cms/BL unit labels are preserved verbatim, not used as calculation inputs. Xmax is explicitly ±9 mm.
Manufacturer enclosure recommendations
No ready-to-load manufacturer enclosure is documented. Load the driver parameters to calculate a CarBoxLab starting design.
Calculator parameters
| Fs | 41 Hz |
|---|---|
| Vas | 28 L |
| Qes | 0.44 |
| Qms | 1.9 |
| Re | 4 Ω |
| Sd | 268 cm² |
| Le | Not provided / unverified |
| One-way linear Xmax | 9 mm |
| Frame diameter | Not provided / unverified |
| Mounting cutout | Not provided / unverified |
| Mounting depth | Not provided / unverified |
Additional manufacturer specifications
| Fs | 41 Hz |
|---|---|
| Qes | 0.44 |
| Qms | 1.9 |
| Vas | 28 L |
| Re | 4 Ω |
| Sd | 268 cm² |
| Xmax, one way | 9 mm |
| Nominal diameter | 200 mm / 8 in |
| Nominal impedance | 4 Ω |
| AES / transient power with HP 35 Hz, 12 dB/oct | 180 / 360 W |
| Sensitivity 1W/1m | 89.5 dB |
| Frequency response | 35–350 Hz |
| Qts published | 0.36 |
| Mms | 53.8 g |
| Cms as printed | 0.27 N/m |
| BL | 11.24 Na |
| Voice coil diameter / height / layers | 63 mm / 24 mm / 2 |
| Magnetic gap height | 6 mm |
| Magnet diameter / height / weight | 60 mm / 14 mm / 160 g |
| Overall dimensions in table | 216.5 × 58 mm |
| Side drawing dimensions | 26 + 33 mm |
| Mounting holes / bolt circle | 4 × Ø6 mm / Ø229 mm |
| Voice coil former | Aluminium 3003H18 |
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.