Lanzar MAX12D
12″ subwoofer · dual 4 Ω
Fs 33.6 HzQts 0.47Vas 3.20 ft³
Recommended box
For a sedan, one sub, 300 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.
Sealed
| Net volume | 1.70 ft³ (48 L) |
|---|---|
| Qtc | 0.80 |
| Fc | 57 Hz |
| F3 (−3 dB, no cabin gain) | 54 Hz |
| Example box (outside) | 14 3/16″ × 14 3/16″ × 20 9/16″ |
Ported
| Net volume | 2.93 ft³ (83 L) |
|---|---|
| Tuning (Fb) | 38 Hz |
| Port | slot 1 3/4 × 14 5/16″, 11 7/8″ long |
| Port velocity at 300 W | 61 ft/s |
| F3 (−3 dB, no cabin gain) | 36 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 14 1/2″ |
Thiele/Small parameters
| Fs | 33.6 Hz |
|---|---|
| Qts | 0.47 |
| Qes | 0.51 |
| Qms | 6 |
| Vas | 3.20 ft³ |
| Re (one coil) | ≈ 3.4 Ω |
| Sd | ≈ 76 in² |
| Xmax | ≈ 0.39″ |
| EBP | 66 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 90.3 dB calc. |
General
| Size | 12″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | — |
Mounting dimensions
| Cutout diameter | ≈ 10 7/8″ |
|---|---|
| Mounting depth | 6 3/4″ |
| Overall diameter | 12 1/8″ |
Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).
“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.
Data sources
Other Lanzar 12″ models
- Lanzar DCT124D 12″ · dual 4 Ω
- Lanzar MAX12 12″ · 4 Ω
- Lanzar OPTI1232D 12″ · dual 2 Ω
- Lanzar OPTI1233D 12″ · dual 1.3 Ω
- Lanzar OPTI1244D 12″ · dual 4 Ω