SICA 18 F 4 CP
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 38 Hz |
| Qts | 0.29 |
| Qes | 0.31 |
| Qms | 5.5 |
| Vas | 185.2 L |
| Sd | 1164 cm² |
| Xmax | 6.2 mm |
| Re | 6.4 Ω |
| Bl | 29.8 T·m |
| Mms | 179.1 g |
| Pe | 700 W |
| Sensitivity | 97 dB |
Alignment hint
| EBP | 123 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 37.4 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 |
|---|---|---|---|---|---|---|---|---|
| B&C 18PZB100 | 38 = | 0.28 -0.01 | 164 -21.2 | 8 +1.8 | 96.5 -0.5 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Oberton 18XB700 | 36.1 -1.9 | 0.304 +0.01 | 183.22 -1.98 | 9 +2.8 | 98 +1 | close | + | |
| Oberton 18XB1300 | 35.2 -2.8 | 0.287 = | 170.9 -14.3 | 8 +1.8 | 97.8 +0.8 | close | + | |
| PD PD 1851/2 | 37 -1 | 0.286 = | 160.5 -24.7 | 6.7 +0.5 | 98.3 +1.3 | close | + | |
| Precision Devices PD 1851/2 | 37 -1 | 0.286 = | 160.5 -24.7 | 6.7 +0.5 | 98.3 +1.3 | close | + | |
| Oberton 18XB1301 | 35.7 -2.3 | 0.302 +0.01 | 172.9 -12.3 | 8.2 +2 | 97.9 +0.9 | close | + | |
| Sica 18 K 4 PL | 36.8 -1.2 | 0.32 +0.03 | 201 +15.8 | 6.5 +0.3 | 97.8 +0.8 | close | + | |
| RCF L 18S800 | 39 +1 | 0.29 = | 206 +20.8 | 6.3 +0.1 | 100.2 +3.2 | close | + | |
| RCF L 18S801 | 39 +1 | 0.29 = | 206 +20.8 | 6.3 +0.1 | 100.2 +3.2 | close | + | |
| Fane COLOSSUS 18XT5N | 36 -2 | 0.331 +0.04 | 185 -0.2 | 8.4 +2.2 | 97.4 +0.4 | close | + |
Compare the closest 3 against the 18 F 4 CP →
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.