PHL Audio 4021 v2026
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 35 Hz |
| Qts | 0.348 |
| Qes | 0.36 |
| Qms | 10.76 |
| Vas | 70 L |
| Sd | 539 cm² |
| Xmax | 7.5 mm |
| Re | 5.6 Ω |
| Bl | 20.3 T·m |
| Mms | 120.3 g |
| Pe | 500 W |
| Sensitivity | 92.7 dB |
Alignment hint
| EBP | 97 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 22.4 L |
EBP 50-100: works in either a sealed or ported 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 |
|---|---|---|---|---|---|---|---|---|
| Focal 33WX | 32.5 -2.5 | 0.349 = | 73.1 +3.1 | 7.1 -0.4 | 94.2 +1.5 | close | 4 Ω vs 8 Ω: amp load changes · Xmax 7.1 mm < 7.5 mm: lower excursion-limited SPL | + |
| Focal 33WX2 | 32.5 -2.5 | 0.349 = | 73.1 +3.1 | 7.1 -0.4 | 94.2 +1.5 | close | 4 Ω vs 8 Ω: amp load changes · Xmax 7.1 mm < 7.5 mm: lower excursion-limited SPL | + |
| Auditor RIP 300P | 28.9 -6.1 | 0.35 = | 79.3 +9.3 | 8.8 +1.3 | 92.6 -0.1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Volt RV3143 | 34 -1 | 0.347 = | 76 +6 | 5.2 -2.3 | 92.3 -0.4 | close | 300 W vs 500 W: lower power handling · Xmax 5.2 mm < 7.5 mm: lower excursion-limited SPL | + |
| Focal 33VX | 34 -1 | 0.322 -0.03 | 66.5 -3.5 | 6.4 -1.1 | 94.7 +2 | close | 4 Ω vs 8 Ω: amp load changes · 350 W vs 500 W: lower power handling · Xmax 6.4 mm < 7.5 mm: lower excursion-limited SPL | + |
| 18 Sound 12NTLS3500 | 41 +6 | 0.34 -0.01 | 63 -7 | 7.9 +0.4 | 94.5 +1.8 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Sica 12 SR 3 CP | 37 +2 | 0.4 +0.05 | 60.9 -9.1 | 8 +0.5 | 92.2 -0.5 | close | + | |
| Ground Zero GZRW 30SPL vp | 33.3 -1.7 | 0.357 +0.01 | 52 -18 | 9.1 +1.6 | 92 -0.7 | close | + | |
| SICA 12 SR 3 CP v2018 | 36.8 +1.8 | 0.387 +0.04 | 64 -6 | 6 -1.5 | 92.5 -0.2 | close | 350 W vs 500 W: lower power handling · Xmax 6 mm < 7.5 mm: lower excursion-limited SPL | + |
| Tang Band W8Q-1071F | 27 -8 | 0.334 -0.01 | 70.4 +0.4 | 9.7 +2.2 | 91.8 -0.9 | close | 4 Ω vs 8 Ω: amp load changes | + |
Compare the closest 3 against the 4021 v2026 →
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.