Celestion BX18-4085
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.2 |
| Qes | 0.206 |
| Qms | 6.635 |
| Vas | 337 L |
| Sd | 1134 cm² |
| Xmax | 3.4 mm |
| Re | 5.84 Ω |
| Bl | 28.4 T·m |
| Mms | 150.6 g |
| Pe | 150 W |
| Sensitivity | 99.8 dB |
Alignment hint
| EBP | 146 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 29.3 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 |
|---|---|---|---|---|---|---|---|---|
| JBL 2243H | 30 = | 0.192 -0.01 | 338.1 +1.1 | 4.3 +0.9 | 100.4 +0.6 | close | + | |
| Fane COLOSSUS 18B | 30.5 +0.5 | 0.197 = | 320 -17 | 4 +0.6 | 99.4 -0.4 | close | + | |
| Fane COLOSSUS 18 BASS | 28 -2 | 0.188 -0.01 | 366 +29 | 3.8 +0.4 | 99.2 -0.6 | close | + | |
| JBL E155-8 | 30 = | 0.2 = | 424.8 +87.8 | 5.1 +1.7 | 100.4 +0.6 | close | + | |
| Radian 2218 NEO SUBWOOFER | 28.9 -1.1 | 0.219 +0.02 | 333 -4 | 6.3 +2.9 | 98.9 -0.9 | close | + | |
| PD PD 184C01 | 30 = | 0.227 +0.03 | 337.1 +0.1 | 7.8 +4.4 | 100.2 +0.4 | close | + | |
| Precision Devices PD 184C01 | 30 = | 0.227 +0.03 | 337.1 +0.1 | 7.8 +4.4 | 100.2 +0.4 | close | + | |
| B&C 18 PZB 46 vp | 28.8 -1.2 | 0.227 +0.03 | 346.4 +9.4 | 8.1 +4.7 | 99 -0.8 | close | + | |
| AE Speakers TD18H+ | 29 -1 | 0.221 +0.02 | 390 +53 | 7 +3.6 | 99.7 -0.1 | close | + | |
| Radian 2218Neo | 30 = | 0.23 +0.03 | 312 -25 | 9 +5.6 | 99 -0.8 | close | + |
Compare the closest 3 against the BX18-4085 →
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.