Fertin Acoustics 38EX-12.5 V
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 20 Hz |
| Qts | 0.125 |
| Qes | 0.13 |
| Qms | 3.17 |
| Vas | 935 L |
| Sd | 830 cm² |
| Xmax | 3 mm |
| Re | 5 Ω |
| Bl | 17.8 T·m |
| Mms | 65.4 g |
| Pe | 80 W |
| Sensitivity | 101.6 dB |
Alignment hint
| EBP | 154 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 30.2 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 |
|---|---|---|---|---|---|---|---|---|
| Fertin Acoustics 38EX-10V | 20 = | 0.17 +0.05 | 935 = | 3 = | 100.2 -1.4 | usable | + | |
| Audax HD38S100 | 15 -5 | 0.126 = | 941.7 +6.7 | 3.5 +0.5 | 97.5 -4.1 | usable | + | |
| EMS B15EX-12.5V | 22 +2 | 0.146 +0.02 | 791 -144 | 5.4 +2.4 | 100.4 -1.2 | usable | + | |
| Fertin Acoustics 38EX-2 | 25 +5 | 0.135 +0.01 | 595 -340 | 3 = | 102.2 +0.6 | usable | + | |
| EMS B15 MKII | 19 -1 | 0.167 +0.04 | 1094 +159 | 7 +4 | 99.3 -2.3 | usable | + | |
| Beyma 15B100R | 20 = | 0.14 +0.02 | 590 -345 | 3 = | 94.9 -6.7 | usable | + | |
| EMS B15 | 20 = | 0.085 -0.04 | 729 -206 | 3.9 +0.9 | 98.7 -2.9 | usable | 16 Ω vs 8 Ω: amp load changes | + |
| Fluxmag 1504-CX | 25.2 +5.2 | 0.158 +0.03 | 659.1 -275.9 | 4 +1 | 101.1 -0.5 | usable | + | |
| Audax WOOFEX 34 | 26.6 +6.6 | 0.104 -0.02 | 653.8 -281.2 | 4 +1 | 103.7 +2.1 | usable | + | |
| Audax PR38SM250 | 19.5 -0.5 | 0.177 +0.05 | 660 -275 | 4 +1 | 97.7 -3.9 | usable | + |
Compare the closest 3 against the 38EX-12.5 V →
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.