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Rockville W15K9D4

15" · 4 Ω · 2500 W · 92.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size15"
Impedance4 Ω
Fs33 Hz
Qts0.886
Qes0.99
Qms8.39
Vas70.6 L
Sd823.7 cm²
Xmax12.9 mm
Re2 Ω
Bl11.5 T·m
Mms314.2 g
Pe2500 W
Sensitivity92.1 dB

Alignment hint

EBP33 · 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

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
Rockville 81921602073933 =0.886 =70.6 =12.9 =92.1 =close+
Ground Zero GZRW 15XSPL D234.1 +1.10.59 -0.363.3 -7.311.3 -1.691.1 -1usableXmax 11.3 mm < 12.9 mm: lower excursion-limited SPL+
Hertz Audio ES 380.532 -10.9 +0.0198.8 +28.29 -3.987.1 -5usable450 W vs 2500 W: lower power handling · Xmax 9 mm < 12.9 mm: lower excursion-limited SPL+
Focal 40KX34.6 +1.60.82 -0.0764.8 -5.85.6 -7.389.2 -2.9usable8 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 TH9515.4431.9 -1.10.653 -0.2370 -0.66.3 -6.693.3 +1.2usable2 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 1530.4 -2.60.56 -0.3389.6 +1915 +2.190 -2.1usable500 W vs 2500 W: lower power handling+
Monacor RAPTOR 1539 +60.696 -0.1956 -14.67.4 -5.592 -0.1usable1000 W vs 2500 W: lower power handling · Xmax 7.4 mm < 12.9 mm: lower excursion-limited SPL+
Monacor RAPTOR 15 MK239 +60.696 -0.1956 -14.67.4 -5.592 -0.1usable1000 W vs 2500 W: lower power handling · Xmax 7.4 mm < 12.9 mm: lower excursion-limited SPL+
MTX Audio T612S-2233.6 +0.60.602 -0.2858.9 -11.77.4 -5.591.2 -0.9usable600 W vs 2500 W: lower power handling · Xmax 7.4 mm < 12.9 mm: lower excursion-limited SPL+
Orion Audio HCCA 15430 -30.535 -0.3580 +9.412.7 -0.287.9 -4.2usable8 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)

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