Sica 18 S 4 PL
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 36.2 Hz |
| Qts | 0.39 |
| Qes | 0.42 |
| Qms | 6.56 |
| Vas | 189 L |
| Sd | 1164.2 cm² |
| Xmax | 8 mm |
| Re | 5.2 Ω |
| Bl | 23.54 T·m |
| Mms | 197 g |
| Pe | 1200 W |
| Sensitivity | 97.3 dB |
Alignment hint
| EBP | 86 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 82.6 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 |
|---|---|---|---|---|---|---|---|---|
| Fane 18XLS | 36 -0.2 | 0.407 +0.02 | 187 -2 | 9.3 +1.3 | 97 -0.3 | close | + | |
| Fane COLOSSUS 18XLS | 36 -0.2 | 0.407 +0.02 | 187 -2 | 9.3 +1.3 | 97 -0.3 | close | + | |
| Celestion POWER PRO X18 | 34.8 -1.4 | 0.379 -0.01 | 188.9 -0.1 | 8.6 +0.6 | 96.6 -0.7 | close | + | |
| B&C 18 TBX 100 (prodance) | 36.6 +0.4 | 0.406 +0.02 | 198 +9 | 9 +1 | 97.4 +0.1 | close | + | |
| PD PD 185N01 | 35.6 -0.6 | 0.383 -0.01 | 174.5 -14.5 | 8.4 +0.4 | 97.1 -0.2 | close | + | |
| Precision Devices PD 185N01 | 35.6 -0.6 | 0.383 -0.01 | 174.5 -14.5 | 8.4 +0.4 | 97.1 -0.2 | close | + | |
| B&C 18PZW100 | 37 +0.8 | 0.36 -0.03 | 186 -3 | 8 = | 97.6 +0.3 | close | + | |
| Beyma 18LEX1600/ND-8 | 35 -1.2 | 0.39 = | 205 +16 | 10.4 +2.4 | 96.8 -0.5 | close | + | |
| Beyma 18G550 | 36 -0.2 | 0.374 -0.02 | 210 +21 | 8.1 +0.1 | 97.8 +0.5 | close | 900 W vs 1200 W: lower power handling | + |
| Beyma 18G550 v2015 | 36 -0.2 | 0.374 -0.02 | 210 +21 | 8.1 +0.1 | 97.8 +0.5 | close | 900 W vs 1200 W: lower power handling | + |
Compare the closest 3 against the 18 S 4 PL →
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.