Fostex W 400 A
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 25 Hz |
| Qts | 0.313 |
| Qes | 0.32 |
| Qms | 14.94 |
| Vas | 312.3 L |
| Sd | 892 cm² |
| Xmax | 4 mm |
| Re | 6.8 Ω |
| Bl | 22 T·m |
| Mms | 144.7 g |
| Pe | 67 W |
| Sensitivity | 94.5 dB |
Alignment hint
| EBP | 78 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 76.1 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 |
|---|---|---|---|---|---|---|---|---|
| Fostex W 400 AII | 25 = | 0.313 = | 312.3 = | 4 = | 94.5 = | close | + | |
| Altec 416-8B v2 | 25.1 +0.1 | 0.315 = | 315 +2.7 | 3.8 -0.2 | 94.4 -0.1 | close | Xmax 3.8 mm < 4 mm: lower excursion-limited SPL | + |
| Fostex W 400 A-HR | 25 = | 0.308 -0.01 | 310 -2.3 | 4.3 +0.3 | 95 +0.5 | close | + | |
| TVM ARA 390-00/8 v1 | 25 = | 0.275 -0.04 | 313 +0.7 | 5.5 +1.5 | 94.6 +0.1 | close | + | |
| TAD TL-1601 C | 28 +3 | 0.309 = | 304 -8.3 | 5.6 +1.6 | 96 +1.5 | close | + | |
| Monacor SPH-390TC vp | 24 -1 | 0.325 +0.01 | 297 -15.3 | 6.2 +2.2 | 96.2 +1.7 | close | 4 Ω vs 8 Ω: amp load changes | + |
| TAD TL-1601 A | 28 +3 | 0.306 -0.01 | 304 -8.3 | 5.5 +1.5 | 96 +1.5 | close | + | |
| Focal 15WX | 24.4 -0.6 | 0.353 +0.04 | 318.9 +6.6 | 6 +2 | 93.5 -1 | close | + | |
| Focal AUDIOM 15WX | 24.4 -0.6 | 0.353 +0.04 | 318.9 +6.6 | 6 +2 | 93.5 -1 | close | + | |
| Altec 3154 | 25 = | 0.322 +0.01 | 393.6 +81.3 | 6.4 +2.4 | 95 +0.5 | close | + |
Compare the closest 3 against the W 400 A →
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.