Fertin Acoustics 38EX-2
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 25 Hz |
| Qts | 0.135 |
| Qes | 0.14 |
| Qms | 3.84 |
| Vas | 595 L |
| Sd | 830 cm² |
| Xmax | 3 mm |
| Re | 5 Ω |
| Bl | 19.2 T·m |
| Mms | 65.8 g |
| Pe | 80 W |
| Sensitivity | 102.2 dB |
Alignment hint
| EBP | 179 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 22.5 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 |
|---|---|---|---|---|---|---|---|---|
| Fluxmag 1504-CX | 25.2 +0.2 | 0.158 +0.02 | 659.1 +64.1 | 4 +1 | 101.1 -1.1 | close | + | |
| Gauss 3540 GAUSS | 25 = | 0.16 +0.02 | 438.9 -156.1 | 5.1 +2.1 | 101.8 -0.4 | usable | 4 Ω vs 8 Ω: amp load changes | + |
| Audax WOOFEX 34 | 26.6 +1.6 | 0.104 -0.03 | 653.8 +58.8 | 4 +1 | 103.7 +1.5 | usable | + | |
| Altec 515B | 24.7 -0.3 | 0.166 +0.03 | 557.8 -37.2 | 4.2 +1.2 | 97.2 -5 | usable | 16 Ω vs 8 Ω: amp load changes | + |
| Altec 515C | 24.7 -0.3 | 0.166 +0.03 | 557.8 -37.2 | 4.2 +1.2 | 97.2 -5 | usable | 16 Ω vs 8 Ω: amp load changes | + |
| Beyma 15B100R | 20 -5 | 0.14 +0.01 | 590 -5 | 3 = | 94.9 -7.3 | usable | + | |
| EMS B15EX-12.5V | 22 -3 | 0.146 +0.01 | 791 +196 | 5.4 +2.4 | 100.4 -1.8 | usable | + | |
| Gauss 3580 GAUSS | 25 = | 0.16 +0.02 | 438.9 -156.1 | 5.1 +2.1 | 99.2 -3 | usable | + | |
| Fluxmag 1504-DF | 21.6 -3.4 | 0.132 = | 393.2 -201.8 | 4 +1 | 98.9 -3.3 | usable | + | |
| Fertin Acoustics 38EX-12.5 V | 20 -5 | 0.125 -0.01 | 935 +340 | 3 = | 101.6 -0.6 | usable | + |
Compare the closest 3 against the 38EX-2 →
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.