Focal W31X4
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 4 Ω |
| Fs | 42 Hz |
| Qts | 0.292 |
| Qes | 0.31 |
| Qms | 5 |
| Vas | 91 L |
| Sd | 530.9 cm² |
| Xmax | 5.5 mm |
| Re | 3.3 Ω |
| Bl | 13.2 T·m |
| Mms | 62.4 g |
| Pe | 300 W |
| Sensitivity | 99.2 dB |
Alignment hint
| EBP | 135 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 18.7 L |
EBP > 100: favours a ported (bass-reflex) alignment.
Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.
Substitute candidates
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| Beyma 12WRS400 | 42 = | 0.29 = | 91 = | 6.3 +0.8 | 97 -2.2 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Beyma 12WR400 | 42 = | 0.285 -0.01 | 91.1 +0.1 | 6.3 +0.8 | 96.9 -2.3 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Sica 12 N 3 PL | 46 +4 | 0.3 +0.01 | 87.9 -3.1 | 5.5 = | 98.5 -0.7 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Beyma 12"WR400 | 42 = | 0.27 -0.02 | 91 = | 6.3 +0.8 | 97 -2.2 | close | 8 Ω vs 4 Ω: amp load changes | + |
| PHL Audio 4500 | 42 = | 0.274 -0.02 | 108 +17 | 5.7 +0.2 | 99 -0.2 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Beyma 12G40 | 44 +2 | 0.292 = | 81 -10 | 6 +0.5 | 96.8 -2.4 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Dayton Audio PA310-8 | 39 -3 | 0.292 = | 91.8 +0.8 | 5 -0.5 | 96.2 -3 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| SB Audience 12MW300 | 43 +1 | 0.264 -0.03 | 104 +13 | 5.6 +0.1 | 98.7 -0.5 | close | 8 Ω vs 4 Ω: amp load changes | + |
| P.Audio SN-12MB | 50 +8 | 0.296 = | 95.3 +4.3 | 5 -0.5 | 99.3 +0.1 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| PHL Audio 4510 | 42 = | 0.307 +0.02 | 108 +17 | 6 +0.5 | 97.3 -1.9 | close | 8 Ω vs 4 Ω: amp load changes | + |
Compare the closest 3 against the W31X4 →
Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.
Used in enclosures (0)
No enclosure in the catalog uses this driver yet.