Celestion TN1225
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 60.5 Hz |
| Qts | 0.33 |
| Qes | 0.37 |
| Qms | 3.03 |
| Vas | 53.9 L |
| Sd | 510 cm² |
| Xmax | 2.5 mm |
| Re | 5.18 Ω |
| Bl | 15.8 T·m |
| Mms | 46.8 g |
| Pe | 250 W |
| Sensitivity | 99 dB |
Alignment hint
| EBP | 164 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 15 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound PWX12 | 61.3 +0.8 | 0.341 +0.01 | 56.2 +2.3 | 2.9 +0.4 | 98.6 -0.4 | close | + | |
| Celestion BN12-300S(8) | 62.1 +1.6 | 0.319 -0.01 | 50 -3.9 | 2.5 = | 97 -2 | close | + | |
| Electro-Voice DL12BFH | 60 -0.5 | 0.307 -0.02 | 55 +1.1 | 4 +1.5 | 100.3 +1.3 | close | + | |
| Fostex L 363 B | 55 -5.5 | 0.33 = | 57 +3.1 | 2.9 +0.4 | 97 -2 | close | 150 W vs 250 W: lower power handling | + |
| Fostex L 363 | 55 -5.5 | 0.33 = | 56.6 +2.7 | 2.3 -0.2 | 97 -2 | close | 150 W vs 250 W: lower power handling · Xmax 2.3 mm < 2.5 mm: lower excursion-limited SPL | + |
| Fertin Acoustics B34D77 | 66.6 +6.1 | 0.324 -0.01 | 52.5 -1.4 | 2.5 = | 102 +3 | close | 4 Ω vs 8 Ω: amp load changes | + |
| PD PD 123ER v2024 | 55.9 -4.6 | 0.293 -0.04 | 54.5 +0.6 | 2.5 = | 97.7 -1.3 | close | + | |
| Precision Devices PD 123ER v2024 | 55.9 -4.6 | 0.293 -0.04 | 54.5 +0.6 | 2.5 = | 97.7 -1.3 | close | + | |
| RCF MB 12G300 | 61 +0.5 | 0.301 -0.03 | 57 +3.1 | 4.3 +1.8 | 100.1 +1.1 | close | + | |
| Monacor SP-312CX | 55 -5.5 | 0.328 = | 64 +10.1 | 3 +0.5 | 98.2 -0.8 | close | + |
Compare the closest 3 against the TN1225 →
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.