Celestion BX12-4085
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 45 Hz |
| Qts | 0.189 |
| Qes | 0.193 |
| Qms | 9.046 |
| Vas | 55.4 L |
| Sd | 527 cm² |
| Xmax | 3.3 mm |
| Re | 5.75 Ω |
| Bl | 27.2 T·m |
| Mms | 87.9 g |
| Pe | 300 W |
| Sensitivity | 97.6 dB |
Alignment hint
| EBP | 233 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 4.3 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 |
|---|---|---|---|---|---|---|---|---|
| BMS 12C362 | 47.5 +2.5 | 0.182 -0.01 | 56.5 +1.1 | 4.4 +1.1 | 98.5 +0.9 | close | + | |
| Sica 12 F 4 CP | 46 +1 | 0.2 +0.01 | 52 -3.4 | 6 +2.7 | 97.8 +0.2 | close | + | |
| RCF MB 12N407 | 48 +3 | 0.194 +0.01 | 50 -5.4 | 4.7 +1.4 | 98.4 +0.8 | close | + | |
| RCF MB12N407 | 48 +3 | 0.194 +0.01 | 50 -5.4 | 4.7 +1.4 | 98.4 +0.8 | close | + | |
| B&C 12 CL 76 | 48 +3 | 0.21 +0.02 | 59 +3.6 | 3.8 +0.5 | 98.6 +1 | close | + | |
| RCF LF 12N401 | 48 +3 | 0.205 +0.02 | 50 -5.4 | 5.2 +1.9 | 97.8 +0.2 | close | + | |
| BMS 12S320 | 45.4 +0.4 | 0.2 +0.01 | 69.5 +14.1 | 4.5 +1.2 | 98 +0.4 | close | + | |
| RCF LF 12X401 | 45 = | 0.211 +0.02 | 50 -5.4 | 6.1 +2.8 | 97 -0.6 | close | + | |
| Oberton 12NB400 | 43.58 -1.42 | 0.18 -0.01 | 70.45 +15.05 | 5.25 +1.95 | 98 +0.4 | close | + | |
| B&C 12CL76 | 48 +3 | 0.21 +0.02 | 59 +3.6 | 6 +2.7 | 98.5 +0.9 | close | + |
Compare the closest 3 against the BX12-4085 →
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.