Sealed · 28.3 L net
Panel thickness: 19 mm.
Driver displacement: 0.82 L.
JL Audio / SUBWOOFER
JL Audio 12TW3-D8 — specifications and enclosures
JL Audio 12TW3-D8: 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. Manufacturer dimensions are reference data; CarBoxLab fits its own geometry. Re and T/S use series coils. Frame is not circular: its largest dimension is used for clearance checks.
Manufacturer enclosure recommendations
Bass-reflex · 36.8 L net
Tuning Fb: 31 Hz.
Manufacturer tuning Fb: 31 Hz. Loads net volume and Fb. Port and dimensions are designed in CarBoxLab, not copied from the factory duct.
Calculator parameters
| Fs | 32.66 Hz |
|---|---|
| Vas | 34.12 L |
| Qes | 0.715 |
| Qms | 10.071 |
| Re | 14.8 Ω |
| Sd | 539 cm² |
| Le | Not provided / unverified |
| One-way linear Xmax | 15.2 mm |
| Frame diameter | 33.5 cm |
| Mounting cutout | 29.5 cm |
| Mounting depth | 8.9 cm |
Additional manufacturer specifications
| Continuous power | 400 W |
|---|---|
| Nominal impedance per coil | 8 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.