Fostex L 363 B
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 55 Hz |
| Qts | 0.33 |
| Qes | 0.35 |
| Qms | 5.8 |
| Vas | 57 L |
| Sd | 535 cm² |
| Xmax | 2.9 mm |
| Re | 6.8 Ω |
| Bl | 19.9 T·m |
| Mms | 58.9 g |
| Pe | 150 W |
| Sensitivity | 97 dB |
Alignment hint
| EBP | 157 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 15.9 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 |
|---|---|---|---|---|---|---|---|---|
| Fostex L 363 | 55 = | 0.33 = | 56.6 -0.4 | 2.3 -0.6 | 97 = | close | Xmax 2.3 mm < 2.9 mm: lower excursion-limited SPL | + |
| Monacor SP-312CX | 55 = | 0.328 = | 64 +7 | 3 +0.1 | 98.2 +1.2 | close | + | |
| Radian 5312-8 | 54.2 -0.8 | 0.362 +0.03 | 54.8 -2.2 | 2.9 = | 96.4 -0.6 | close | + | |
| Radian 5312 | 54 -1 | 0.366 +0.04 | 55.4 -1.6 | 2.9 = | 96.4 -0.6 | close | + | |
| 18 Sound PWX12 | 61.3 +6.3 | 0.341 +0.01 | 56.2 -0.8 | 2.9 = | 98.6 +1.6 | close | + | |
| Turbosound TS-12W350/8W | 55 = | 0.347 +0.02 | 49 -8 | 4 +1.1 | 96.9 -0.1 | close | + | |
| Mercuriale PAR 312 M0 | 49 -6 | 0.323 -0.01 | 59.9 +2.9 | 3.4 +0.5 | 96 -1 | close | + | |
| 18 Sound 12W750 | 55 = | 0.33 = | 61 +4 | 8 +5.1 | 98 +1 | close | 16 Ω vs 8 Ω: amp load changes | + |
| SB Audience NERO-12MWN700D vp JustDiyIt | 54.4 -0.6 | 0.347 +0.02 | 53.6 -3.4 | 6.2 +3.3 | 97.5 +0.5 | close | + | |
| Beyma 12"MC500 | 57 +2 | 0.34 +0.01 | 57 = | 8 +5.1 | 98 +1 | close | + |
Compare the closest 3 against the L 363 B →
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.