Sica 12 PFS 4
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 39 Hz |
| Qts | 0.26 |
| Qes | 0.27 |
| Qms | 4.6 |
| Vas | 55.6 L |
| Sd | 530.9 cm² |
| Xmax | 9 mm |
| Re | 5.2 Ω |
| Bl | 23.88 T·m |
| Mms | 120 g |
| Pe | 1000 W |
| Sensitivity | 94.8 dB |
Alignment hint
| EBP | 144 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 8.7 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 12NLW9410 | 42 +3 | 0.26 = | 55 -0.6 | 11 +2 | 95 +0.2 | close | + | |
| Sica 12 S 4 PL | 40.4 +1.4 | 0.25 -0.01 | 57 +1.4 | 7.5 -1.5 | 95.5 +0.7 | close | Xmax 7.5 mm < 9 mm: lower excursion-limited SPL | + |
| RCF LF12X401 | 45 +6 | 0.27 +0.01 | 50 -5.6 | 9 = | 96.5 +1.7 | close | + | |
| Beyma 12P1000ND | 47 +8 | 0.26 = | 49 -6.6 | 8 -1 | 94.6 -0.2 | close | 450 W vs 1000 W: lower power handling · Xmax 8 mm < 9 mm: lower excursion-limited SPL | + |
| Sica 12 PNS 4 | 41.7 +2.7 | 0.31 +0.05 | 50.2 -5.4 | 9.5 +0.5 | 94.5 -0.3 | close | + | |
| B&C 12NBX100 | 41 +2 | 0.22 -0.04 | 51 -4.6 | 10 +1 | 96 +1.2 | close | + | |
| B&C 12TBX100 | 42 +3 | 0.26 = | 37.5 -18.1 | 9 = | 95 +0.2 | close | + | |
| BMS 12N804 | 39 = | 0.29 +0.03 | 71 +15.4 | 8 -1 | 95 +0.2 | close | Xmax 8 mm < 9 mm: lower excursion-limited SPL | + |
| Beyma 12 P1000/Nd | 47 +8 | 0.26 = | 49 -6.6 | 8 -1 | 96 +1.2 | close | Xmax 8 mm < 9 mm: lower excursion-limited SPL | + |
| B&C 12NBX100 | 40 +1 | 0.22 -0.04 | 46.5 -9.1 | 10 +1 | 94 -0.8 | usable | 4 Ω vs 8 Ω: amp load changes | + |
Compare the closest 3 against the 12 PFS 4 →
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.