B&C 12 FCX 76
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 47 Hz |
| Qts | 0.339 |
| Qes | 0.35 |
| Qms | 11 |
| Vas | 82 L |
| Sd | 522 cm² |
| Xmax | 5 mm |
| Re | 5.3 Ω |
| Bl | 15.5 T·m |
| Mms | 53.4 g |
| Pe | 350 W |
| Sensitivity | 97.6 dB |
Alignment hint
| EBP | 134 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 24.5 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 |
|---|---|---|---|---|---|---|---|---|
| RCF MB 12N251 | 50 +3 | 0.338 = | 83 +1 | 5 = | 98.5 +0.9 | close | + | |
| SICA PL 12 B 3 S | 46.7 -0.3 | 0.356 +0.02 | 79.3 -2.7 | 5.5 +0.5 | 97.1 -0.5 | close | + | |
| Monacor SP-12A/302PA | 50 +3 | 0.335 = | 77 -5 | 5 = | 97.3 -0.3 | close | + | |
| Faital PRO 12PR300 v2015 | 50 +3 | 0.357 +0.02 | 79.2 -2.8 | 4.9 -0.1 | 98 +0.4 | close | Xmax 4.9 mm < 5 mm: lower excursion-limited SPL | + |
| Eminence DELTA PRO 12 A | 51 +4 | 0.353 +0.01 | 81.7 -0.3 | 6.2 +1.2 | 98.1 +0.5 | close | + | |
| Eminence DELTA PRO 12 A vp | 51 +4 | 0.353 +0.01 | 81.7 -0.3 | 6.2 +1.2 | 98.1 +0.5 | close | + | |
| B&C 12 PS 32 | 44 -3 | 0.348 +0.01 | 82 = | 6 +1 | 95.8 -1.8 | close | + | |
| 18 Sound 12MB606 | 50 +3 | 0.323 -0.02 | 84 +2 | 6.4 +1.4 | 98.3 +0.7 | close | + | |
| LaVoce NBASS12-30-16 | 48 +1 | 0.34 = | 69.83 -12.17 | 7.3 +2.3 | 97.5 -0.1 | close | 16 Ω vs 8 Ω: amp load changes | + |
| JBL 2204H | 45 -2 | 0.35 +0.01 | 87.8 +5.8 | 5.6 +0.6 | 95.7 -1.9 | close | + |
Compare the closest 3 against the 12 FCX 76 →
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.