Rockford Fosgate P2D4-12
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 27 Hz |
| Qts | 0.581 |
| Qes | 0.62 |
| Qms | 9.3 |
| Vas | 70.3 L |
| Sd | 510 cm² |
| Xmax | 10.1 mm |
| Re | 5.9 Ω |
| Bl | 17.1 T·m |
| Mms | 180.2 g |
| Pe | 400 W |
| Sensitivity | 86.8 dB |
Alignment hint
| EBP | 44 · sealed |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 146.1 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 |
|---|---|---|---|---|---|---|---|---|
| Dayton Audio UM12-22 | 24.9 -2.1 | 0.589 +0.01 | 71.6 +1.3 | 12.5 +2.4 | 87.7 +0.9 | close | 4 Ω vs 8 Ω: amp load changes | + |
| JL Audio 12W1V3-2 | 26.55 -0.45 | 0.52 -0.06 | 72 +1.7 | 11 +0.9 | 85.9 -0.9 | close | 2 Ω vs 8 Ω: amp load changes · 300 W vs 400 W: lower power handling | + |
| Audio System HX12 SQ | 28.2 +1.2 | 0.5 -0.08 | 68 -2.3 | 11.8 +1.7 | 86.1 -0.7 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Dayton Audio RSS315HFA-8 | 25 -2 | 0.526 -0.05 | 75 +4.7 | 9.9 -0.2 | 85.5 -1.3 | close | Xmax 9.9 mm < 10.1 mm: lower excursion-limited SPL | + |
| JL Audio 12W1V3-4 | 26.21 -0.79 | 0.5 -0.08 | 76.63 +6.33 | 11 +0.9 | 86.1 -0.7 | close | 4 Ω vs 8 Ω: amp load changes · 300 W vs 400 W: lower power handling | + |
| Wavecor SW310WA01 | 28.5 +1.5 | 0.603 +0.02 | 65.5 -4.8 | 7.6 -2.5 | 86.8 = | close | 250 W vs 400 W: lower power handling · Xmax 7.6 mm < 10.1 mm: lower excursion-limited SPL | + |
| Sound Storm Labs CR12D | 30.7 +3.7 | 0.522 -0.06 | 66.9 -3.4 | 10.3 +0.2 | 87.5 +0.7 | close | + | |
| JL Audio 12W0V3-4 | 28.4 +1.4 | 0.67 +0.09 | 71.6 +1.3 | 9.3 -0.8 | 88.3 +1.5 | close | 300 W vs 400 W: lower power handling · Xmax 9.3 mm < 10.1 mm: lower excursion-limited SPL | + |
| Alpine SWA-12S4 | 30 +3 | 0.49 -0.09 | 67.79 -2.51 | 10 -0.1 | 87.2 +0.4 | close | 4 Ω vs 8 Ω: amp load changes · 250 W vs 400 W: lower power handling · Xmax 10 mm < 10.1 mm: lower excursion-limited SPL | + |
| Rockford Fosgate T1D412 | 29.2 +2.2 | 0.613 +0.03 | 55.8 -14.5 | 10.9 +0.8 | 85.8 -1 | close | + |
Compare the closest 3 against the P2D4-12 →
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.