Sealed · 5 L net
Panel thickness: 18 mm.
75% Dacron; consult manual for DSP settings. Loads volume, not factory cutting plans.
ESB / SUBWOOFER
ESB 1.8-4 — specifications and enclosures
ESB 1.8-4: T/S parameters, mounting dimensions and manufacturer enclosure recommendations. Read the original PDF and load the driver into the 3D designer.
Le is not published. Manual designs use DSP filters, EQ and damping; these settings are not automatically reproduced.
Manufacturer enclosure recommendations
Sealed · 9.5 L net
Panel thickness: 18 mm.
75% Dacron; consult manual for DSP settings. Loads volume, not factory cutting plans.
Bass-reflex · 10 L net
Fb is not stated. DSP filter frequency is not port tuning.
Documentation only — check the limitations before use.
PDF · page 6Bass-reflex · 18 L net
Fb is not stated. DSP filter frequency is not port tuning.
Documentation only — check the limitations before use.
PDF · page 6Calculator parameters
| Fs | 37.4 Hz |
|---|---|
| Vas | 17.68 L |
| Qes | 0.372 |
| Qms | 3.374 |
| Re | 3.6 Ω |
| Sd | 219 cm² |
| Le | Not provided / unverified |
| One-way linear Xmax | 8.5 mm |
| Frame diameter | 21.6 cm |
| Mounting cutout | 18 cm |
| Mounting depth | 9.7 cm |
Additional manufacturer specifications
| Continuous power | 200 W |
|---|---|
| Nominal impedance | 4 Ω |
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: 2026-10-31.