JBL 1200 GTI
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 4 Ω |
| Fs | 37 Hz |
| Qts | 0.47 |
| Qes | 0.52 |
| Qms | 4.89 |
| Vas | 56.7 L |
| Sd | 548 cm² |
| Xmax | 8 mm |
| Re | 2.5 Ω |
| Bl | 12.4 T·m |
| Mms | 137.5 g |
| Pe | 600 W |
| Sensitivity | 94.5 dB |
Alignment hint
| EBP | 71 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 44.9 L |
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 |
|---|---|---|---|---|---|---|---|---|
| Bravox UXP12D-4 | 32 -5 | 0.496 +0.03 | 58 +1.3 | 7.5 -0.5 | 94.1 -0.4 | close | 2 Ω vs 4 Ω: amp load changes · 400 W vs 600 W: lower power handling · Xmax 7.5 mm < 8 mm: lower excursion-limited SPL | + |
| Sica 12 PFS 3 | 43 +6 | 0.47 = | 58.5 +1.8 | 7 -1 | 93.6 -0.9 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 7 mm < 8 mm: lower excursion-limited SPL | + |
| Celestion FTR12-4080DL/4 | 35.3 -1.7 | 0.428 -0.04 | 51.4 -5.3 | 8 = | 92.5 -2 | close | + | |
| Sica 12 SR 3 CP | 37 = | 0.4 -0.07 | 60.9 +4.2 | 8 = | 92.2 -2.3 | close | 8 Ω vs 4 Ω: amp load changes · 450 W vs 600 W: lower power handling | + |
| Pioneer TS-W306C | 32.6 -4.4 | 0.414 -0.06 | 55.6 -1.1 | 8.1 +0.1 | 92.8 -1.7 | close | 400 W vs 600 W: lower power handling | + |
| Powerbass L-124D 12 | 29 -8 | 0.489 +0.02 | 59 +2.3 | 9 +1 | 93.2 -1.3 | close | 2 Ω vs 4 Ω: amp load changes · 400 W vs 600 W: lower power handling | + |
| Focal P30DB | 29.4 -7.6 | 0.427 -0.04 | 56.8 +0.1 | 7.7 -0.3 | 93.7 -0.8 | close | 2 Ω vs 4 Ω: amp load changes · 400 W vs 600 W: lower power handling · Xmax 7.7 mm < 8 mm: lower excursion-limited SPL | + |
| Sica 12 SR 3 PL | 36 -1 | 0.42 -0.05 | 60.4 +3.7 | 7 -1 | 91.8 -2.7 | usable | 8 Ω vs 4 Ω: amp load changes · 400 W vs 600 W: lower power handling · Xmax 7 mm < 8 mm: lower excursion-limited SPL | + |
| SICA 12 SR 3 PL v2018 | 36 -1 | 0.418 -0.05 | 60.4 +3.7 | 7 -1 | 91.7 -2.8 | usable | 8 Ω vs 4 Ω: amp load changes · 400 W vs 600 W: lower power handling · Xmax 7 mm < 8 mm: lower excursion-limited SPL | + |
| 18 Sound 12NTLS3500 | 41 +4 | 0.41 -0.06 | 65 +8.3 | 7.9 -0.1 | 93.5 -1 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 7.9 mm < 8 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 1200 GTI →
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.