Rockford Fosgate S1-124
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 4 Ω |
| Fs | 28 Hz |
| Qts | 0.326 |
| Qes | 0.36 |
| Qms | 3.41 |
| Vas | 186 L |
| Sd | 545 cm² |
| Xmax | 9.9 mm |
| Re | 3.4 Ω |
| Bl | 11 T·m |
| Mms | 72.3 g |
| Pe | 300 W |
| Sensitivity | 96.2 dB |
Alignment hint
| EBP | 78 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 50.2 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 |
|---|---|---|---|---|---|---|---|---|
| Westra SW-300-2808 | 30 +2 | 0.322 = | 209 +23 | 9.3 -0.6 | 94.7 -1.5 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 9.3 mm < 9.9 mm: lower excursion-limited SPL | + |
| Visaton TD1 | 30.3 +2.3 | 0.327 = | 200 +14 | 7.6 -2.3 | 95.3 -0.9 | close | 8 Ω vs 4 Ω: amp load changes · 150 W vs 300 W: lower power handling · Xmax 7.6 mm < 9.9 mm: lower excursion-limited SPL | + |
| Visaton WS33NG | 30 +2 | 0.308 -0.02 | 190 +4 | 8 -1.9 | 94.5 -1.7 | close | 8 Ω vs 4 Ω: amp load changes · 200 W vs 300 W: lower power handling · Xmax 8 mm < 9.9 mm: lower excursion-limited SPL | + |
| Focal 12V 726DB | 25.9 -2.1 | 0.354 +0.03 | 210.5 +24.5 | 8.5 -1.4 | 96 -0.2 | close | 150 W vs 300 W: lower power handling · Xmax 8.5 mm < 9.9 mm: lower excursion-limited SPL | + |
| Visaton TD | 31 +3 | 0.324 = | 200 +14 | 7.3 -2.6 | 95.5 -0.7 | close | 8 Ω vs 4 Ω: amp load changes · 150 W vs 300 W: lower power handling · Xmax 7.3 mm < 9.9 mm: lower excursion-limited SPL | + |
| Jensen RS12045SW | 25 -3 | 0.3 -0.03 | 220 +34 | 11 +1.1 | 95.6 -0.6 | close | + | |
| Cabasse 30M22 | 31.5 +3.5 | 0.315 -0.01 | 196.1 +10.1 | 8 -1.9 | 97.7 +1.5 | close | 8 Ω vs 4 Ω: amp load changes · 200 W vs 300 W: lower power handling · Xmax 8 mm < 9.9 mm: lower excursion-limited SPL | + |
| Dayton Audio ST305-8 Séries II | 26.2 -1.8 | 0.334 +0.01 | 164 -22 | 8 -1.9 | 92.3 -3.9 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 8 mm < 9.9 mm: lower excursion-limited SPL | + |
| Magnat SUPREME 3000 | 29 +1 | 0.31 -0.02 | 131 -55 | 8 -1.9 | 96.4 +0.2 | usable | Xmax 8 mm < 9.9 mm: lower excursion-limited SPL | + |
| Dayton Audio 12 DVC | 25 -3 | 0.347 +0.02 | 147.3 -38.7 | 15.5 +5.6 | 94 -2.2 | usable | + |
Compare the closest 3 against the S1-124 →
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.