Rockford Fosgate T1D412
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 29.2 Hz |
| Qts | 0.613 |
| Qes | 0.71 |
| Qms | 4.5 |
| Vas | 55.8 L |
| Sd | 548 cm² |
| Xmax | 10.9 mm |
| Re | 6.5 Ω |
| Bl | 19.4 T·m |
| Mms | 224.1 g |
| Pe | 800 W |
| Sensitivity | 85.8 dB |
Alignment hint
| EBP | 41 · sealed |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 168.8 L |
EBP < 50: favours a sealed (closed) 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 |
|---|---|---|---|---|---|---|---|---|
| Alpine SWE-1242 | 31 +1.8 | 0.66 +0.05 | 61 +5.2 | 11.7 +0.8 | 85.9 +0.1 | close | 4 Ω vs 8 Ω: amp load changes · 250 W vs 800 W: lower power handling | + |
| Soundstream STEALTH-124 | 29.98 +0.78 | 0.687 +0.07 | 59.5 +3.7 | 13 +2.1 | 84.8 -1 | close | 350 W vs 800 W: lower power handling | + |
| Rockford Fosgate T0D412 | 26 -3.2 | 0.529 -0.08 | 55.1 -0.7 | 10.7 -0.2 | 85.3 -0.5 | close | Xmax 10.7 mm < 10.9 mm: lower excursion-limited SPL | + |
| Dayton Audio UMII12-22 | 31 +1.8 | 0.564 -0.05 | 53 -2.8 | 10 -0.9 | 88.2 +2.4 | close | Xmax 10 mm < 10.9 mm: lower excursion-limited SPL | + |
| Dayton Audio UM12-22 v2017 | 26.2 -3 | 0.594 -0.02 | 46.8 -9 | 9.9 -1 | 86.7 +0.9 | close | 4 Ω vs 8 Ω: amp load changes · 600 W vs 800 W: lower power handling · Xmax 9.9 mm < 10.9 mm: lower excursion-limited SPL | + |
| Rockford Fosgate T1D212 | 28 -1.2 | 0.522 -0.09 | 55.8 = | 10.9 = | 89.1 +3.3 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Alpine SWE-1241 | 31 +1.8 | 0.653 +0.04 | 61 +5.2 | 11.3 +0.4 | 89.6 +3.8 | close | 4 Ω vs 8 Ω: amp load changes · 600 W vs 800 W: lower power handling | + |
| Cerwin-Vega VEGA 124 | 30.3 +1.1 | 0.612 = | 60.3 +4.5 | 7 -3.9 | 86.4 +0.6 | close | 400 W vs 800 W: lower power handling · Xmax 7 mm < 10.9 mm: lower excursion-limited SPL | + |
| Rockford Fosgate P3D4-12 | 27.7 -1.5 | 0.517 -0.1 | 57.7 +1.9 | 9.4 -1.5 | 86.3 +0.5 | close | 600 W vs 800 W: lower power handling · Xmax 9.4 mm < 10.9 mm: lower excursion-limited SPL | + |
| Audiomobile ELITE 2212 | 28 -1.2 | 0.48 -0.13 | 59.46 +3.66 | 12.7 +1.8 | 85.8 = | close | 4 Ω vs 8 Ω: amp load changes · 600 W vs 800 W: lower power handling | + |
Compare the closest 3 against the T1D412 →
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.