Fertin Acoustics 46EX 12.5V
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 22.2 Hz |
| Qts | 0.117 |
| Qes | 0.12 |
| Qms | 5.2 |
| Vas | 667.7 L |
| Sd | 1101.5 cm² |
| Xmax | 3 mm |
| Re | 5 Ω |
| Bl | 27.6 T·m |
| Mms | 131.5 g |
| Pe | 100 W |
| Sensitivity | 101.8 dB |
Alignment hint
| EBP | 185 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 18.8 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 46EX 15.0V | 22.2 = | 0.108 -0.01 | 667.7 = | 3 = | 102.2 +0.4 | close | + | |
| Fertin Acoustics 46EX 10.0V | 22.2 = | 0.155 +0.04 | 667.7 = | 3 = | 100.6 -1.2 | close | + | |
| Benett 18.300 | 22.8 +0.6 | 0.133 +0.02 | 809.8 +142.1 | 5 +2 | 101.3 -0.5 | usable | + | |
| Benett 18.300 T/S | 22.8 +0.6 | 0.133 +0.02 | 809.8 +142.1 | 5 +2 | 101.3 -0.5 | usable | + | |
| Fertin Acoustics 46EX 12.5V v2 | 23 +0.8 | 0.151 +0.03 | 500 -167.7 | 3 = | 99.8 -2 | usable | + | |
| Fertin Acoustics 46EX 10.0V v2 | 23 +0.8 | 0.186 +0.07 | 500 -167.7 | 3 = | 98.9 -2.9 | usable | + | |
| Fertin Acoustics 46EX 07.5V | 22.2 = | 0.24 +0.12 | 667.7 = | 3 = | 98.6 -3.2 | usable | + | |
| Altec 3184 | 24 +1.8 | 0.219 +0.1 | 690.9 +23.2 | 6.4 +3.4 | 98.5 -3.3 | risky | + | |
| Great Plains Audio 3184 GPA | 24 +1.8 | 0.219 +0.1 | 690.9 +23.2 | 6.4 +3.4 | 98.5 -3.3 | risky | + | |
| Beyma 18GT200 v1 | 24.6 +2.4 | 0.213 +0.1 | 595 -72.7 | 5.8 +2.8 | 99.3 -2.5 | risky | + |
Compare the closest 3 against the 46EX 12.5V →
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.