Lanzar MAX8
8″ subwoofer · 4 Ω
Fs 42.9 HzQts 0.39Vas 0.71 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 | 0.32 ft³ (9 L) |
|---|---|
| Qtc | 0.70 |
| Fc | 77 Hz |
| F3 (−3 dB, no cabin gain) | 82 Hz |
| Example box (outside) | 10 5/8″ × 10 5/8″ × 8 5/8″ |
Ported
| Net volume | 0.71 ft³ (20 L) |
|---|---|
| Tuning (Fb) | 45 Hz |
| Port | round port Ø3″, 10 15/16″ long |
| Port velocity at 300 W | 124 ft/s |
| F3 (−3 dB, no cabin gain) | 44 Hz |
| Example box (outside) | 17 1/8″ × 15 3/4″ × 7 1/2″ |
Thiele/Small parameters
| Fs | 42.9 Hz |
|---|---|
| Qts | 0.39 |
| Qes | 0.417 |
| Qms | 6 |
| Vas | 0.71 ft³ |
| Re | ≈ 3.4 Ω |
| Sd | ≈ 33.3 in² |
| Xmax | ≈ 0.39″ |
| EBP | 103 — suits ported calc. |
| Sensitivity, 1 W / 1 m | 87.8 dB calc. |
General
| Size | 8″ |
|---|---|
| Voice coils | 4 Ω |
| RMS power | — |
Mounting dimensions
| Cutout diameter | ≈ 7 3/8″ |
|---|---|
| Mounting depth | 4 15/16″ |
| Overall diameter | 8 1/4″ |
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.