Celestion TF 1225CX
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 63.5 Hz |
| Qts | 0.358 |
| Qes | 0.405 |
| Qms | 3.119 |
| Vas | 45.1 L |
| Sd | 531 cm² |
| Xmax | 2.5 mm |
| Re | 5.57 Ω |
| Bl | 17.4 T·m |
| Mms | 55 g |
| Pe | 250 W |
| Sensitivity | 98.1 dB |
Alignment hint
| EBP | 157 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 15.5 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 |
|---|---|---|---|---|---|---|---|---|
| HH Electronics B12L | 64 +0.5 | 0.382 +0.02 | 44.8 -0.3 | 3.4 +0.9 | 97.4 -0.7 | close | + | |
| RCF L 12P540 | 59 -4.5 | 0.349 -0.01 | 45 -0.1 | 4.3 +1.8 | 97.6 -0.5 | close | + | |
| RCF L 12P520 | 65 +1.5 | 0.355 = | 49 +3.9 | 3.4 +0.9 | 99.6 +1.5 | close | + | |
| RCF L12P520 | 65 +1.5 | 0.37 +0.01 | 47 +1.9 | 4 +1.5 | 97 -1.1 | close | 125 W vs 250 W: lower power handling | + |
| LaVoce WAF122.50 | 59 -4.5 | 0.365 +0.01 | 47 +1.9 | 4 +1.5 | 97.4 -0.7 | close | + | |
| Celestion BN12-300S8 | 69.3 +5.8 | 0.392 +0.03 | 43.5 -1.6 | 2.5 = | 98.8 +0.7 | close | + | |
| Celestion FTR12-3070C | 66.1 +2.6 | 0.332 -0.03 | 39.6 -5.5 | 3 +0.5 | 98.5 +0.4 | close | + | |
| JBL 2023H | 67 +3.5 | 0.347 -0.01 | 48.8 +3.7 | 3.7 +1.2 | 99.8 +1.7 | close | + | |
| Celestion BN12-300S(8) | 62.1 -1.4 | 0.319 -0.04 | 50 +4.9 | 2.5 = | 97 -1.1 | close | + | |
| P.Audio P-12N | 57 -6.5 | 0.319 -0.04 | 42.4 -2.7 | 2.5 = | 97.7 -0.4 | close | + |
Compare the closest 3 against the TF 1225CX →
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.