Audax PR38ST250
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 38 Hz |
| Qts | 0.311 |
| Qes | 0.33 |
| Qms | 5.3 |
| Vas | 193 L |
| Sd | 880 cm² |
| Xmax | 4.9 mm |
| Re | 5.8 Ω |
| Bl | 20.3 T·m |
| Mms | 98.7 g |
| Pe | 250 W |
| Sensitivity | 98.4 dB |
Alignment hint
| EBP | 115 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 46.3 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 |
|---|---|---|---|---|---|---|---|---|
| Radian 5215B | 39 +1 | 0.313 = | 192.4 -0.6 | 5.5 +0.6 | 98.5 +0.1 | close | + | |
| RCF L 15L601 | 38 = | 0.305 -0.01 | 190 -3 | 5 +0.1 | 97.9 -0.5 | close | + | |
| Radian 5215 B-8 | 38.7 +0.7 | 0.316 +0.01 | 189.7 -3.3 | 5.5 +0.6 | 98.2 -0.2 | close | + | |
| Audax BMP402 | 38 = | 0.311 = | 193 = | 4 -0.9 | 98.4 = | close | Xmax 4 mm < 4.9 mm: lower excursion-limited SPL | + |
| Audax PR38XT250 | 38 = | 0.311 = | 193 = | 4 -0.9 | 98.4 = | close | Xmax 4 mm < 4.9 mm: lower excursion-limited SPL | + |
| LaVoce WAF154.03 | 38 = | 0.29 -0.02 | 188 -5 | 5.2 +0.3 | 98.6 +0.2 | close | + | |
| PHL Audio 5102 | 36 -2 | 0.306 -0.01 | 190 -3 | 6.1 +1.2 | 97.8 -0.6 | close | + | |
| Fane 15-400 | 37 -1 | 0.305 -0.01 | 210 +17 | 5 +0.1 | 99.1 +0.7 | close | + | |
| Fane SOVEREIGN 15-400 | 37 -1 | 0.305 -0.01 | 210 +17 | 5 +0.1 | 99.1 +0.7 | close | + | |
| Fane SOVEREIGN PRO 15-500 | 40 +2 | 0.319 +0.01 | 192 -1 | 6 +1.1 | 99.4 +1 | close | + |
Compare the closest 3 against the PR38ST250 →
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.