Rockville W15K9D4
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 4 Ω |
| Fs | 33 Hz |
| Qts | 0.886 |
| Qes | 0.99 |
| Qms | 8.39 |
| Vas | 70.6 L |
| Sd | 823.7 cm² |
| Xmax | 12.9 mm |
| Re | 2 Ω |
| Bl | 11.5 T·m |
| Mms | 314.2 g |
| Pe | 2500 W |
| Sensitivity | 92.1 dB |
Alignment hint
| EBP | 33 · sealed |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | Qts too high |
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 |
|---|---|---|---|---|---|---|---|---|
| Rockville 819216020739 | 33 = | 0.886 = | 70.6 = | 12.9 = | 92.1 = | close | + | |
| Ground Zero GZRW 15XSPL D2 | 34.1 +1.1 | 0.59 -0.3 | 63.3 -7.3 | 11.3 -1.6 | 91.1 -1 | usable | Xmax 11.3 mm < 12.9 mm: lower excursion-limited SPL | + |
| Hertz Audio ES 380.5 | 32 -1 | 0.9 +0.01 | 98.8 +28.2 | 9 -3.9 | 87.1 -5 | usable | 450 W vs 2500 W: lower power handling · Xmax 9 mm < 12.9 mm: lower excursion-limited SPL | + |
| Focal 40KX | 34.6 +1.6 | 0.82 -0.07 | 64.8 -5.8 | 5.6 -7.3 | 89.2 -2.9 | usable | 8 Ω vs 4 Ω: amp load changes · 500 W vs 2500 W: lower power handling · Xmax 5.6 mm < 12.9 mm: lower excursion-limited SPL | + |
| MTX Audio TH9515.44 | 31.9 -1.1 | 0.653 -0.23 | 70 -0.6 | 6.3 -6.6 | 93.3 +1.2 | usable | 2 Ω vs 4 Ω: amp load changes · 600 W vs 2500 W: lower power handling · Xmax 6.3 mm < 12.9 mm: lower excursion-limited SPL | + |
| American Bass DX 15 | 30.4 -2.6 | 0.56 -0.33 | 89.6 +19 | 15 +2.1 | 90 -2.1 | usable | 500 W vs 2500 W: lower power handling | + |
| Monacor RAPTOR 15 | 39 +6 | 0.696 -0.19 | 56 -14.6 | 7.4 -5.5 | 92 -0.1 | usable | 1000 W vs 2500 W: lower power handling · Xmax 7.4 mm < 12.9 mm: lower excursion-limited SPL | + |
| Monacor RAPTOR 15 MK2 | 39 +6 | 0.696 -0.19 | 56 -14.6 | 7.4 -5.5 | 92 -0.1 | usable | 1000 W vs 2500 W: lower power handling · Xmax 7.4 mm < 12.9 mm: lower excursion-limited SPL | + |
| MTX Audio T612S-22 | 33.6 +0.6 | 0.602 -0.28 | 58.9 -11.7 | 7.4 -5.5 | 91.2 -0.9 | usable | 600 W vs 2500 W: lower power handling · Xmax 7.4 mm < 12.9 mm: lower excursion-limited SPL | + |
| Orion Audio HCCA 154 | 30 -3 | 0.535 -0.35 | 80 +9.4 | 12.7 -0.2 | 87.9 -4.2 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 12.7 mm < 12.9 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the W15K9D4 →
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.