Jensen JCH 1270-8
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 78 Hz |
| Qts | 1.084 |
| Qes | 1.15 |
| Qms | 19 |
| Vas | 46.7 L |
| Sd | 491 cm² |
| Xmax | 1.5 mm |
| Re | 5.3 Ω |
| Bl | 8.2 T·m |
| Mms | 30.1 g |
| Pe | 70 W |
| Sensitivity | 96.6 dB |
Alignment hint
| EBP | 68 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | Qts too high |
EBP 50-100: works in either a sealed or ported 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 |
|---|---|---|---|---|---|---|---|---|
| Celestion G12T-100 | 81 +3 | 0.833 -0.25 | 47 +0.3 | 2 +0.5 | 96.8 +0.2 | close | + | |
| Celestion F12M-150 Triple Cone | 69.4 -8.6 | 0.906 -0.18 | 46.9 +0.2 | 2.3 +0.8 | 95.2 -1.4 | usable | + | |
| Celestion G12T 75 | 85 +7 | 0.836 -0.25 | 51 +4.3 | 2 +0.5 | 95.3 -1.3 | usable | 16 Ω vs 8 Ω: amp load changes | + |
| Celestion F12-X200 | 75 -3 | 0.777 -0.31 | 47.3 +0.6 | 3 +1.5 | 97.1 +0.5 | usable | + | |
| JBL 2142H | 72 -6 | 0.755 -0.33 | 45.3 -1.4 | 2.2 +0.7 | 96.5 -0.1 | usable | + | |
| Beyma 12GA50 | 90 +12 | 1.16 +0.08 | 34 -12.7 | 2 +0.5 | 94.8 -1.8 | usable | + | |
| Monacor SP-300GI | 65 -13 | 0.969 -0.12 | 75 +28.3 | 3.2 +1.7 | 94.9 -1.7 | usable | + | |
| Celestion G12M-65 CREAMBACK | 74 -4 | 0.655 -0.43 | 52.7 +6 | 1.3 -0.2 | 97.7 +1.1 | usable | 25 W vs 70 W: lower power handling · Xmax 1.3 mm < 1.5 mm: lower excursion-limited SPL | + |
| Celestion TF 1215 | 62 -16 | 0.857 -0.23 | 69 +22.3 | 2.5 +1 | 96.2 -0.4 | usable | + | |
| STX F30.300.8.MC | 55 -23 | 1.045 -0.04 | 57 +10.3 | 2.4 +0.9 | 89.7 -6.9 | usable | + |
Compare the closest 3 against the JCH 1270-8 →
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.