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Rockford Fosgate P2D4-15

15" · 8 Ω · 400 W · 87.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size15"
Impedance8 Ω
Fs20.9 Hz
Qts0.655
Qes0.74
Qms5.7
Vas219.6 L
Sd894 cm²
Xmax11.3 mm
Re6.4 Ω
Bl18.3 T·m
Mms295.9 g
Pe400 W
Sensitivity87.3 dB

Alignment hint

EBP28 · sealed
Sealed Vb (Qtc ≈ 0.71)≈ 1327.4 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

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
Hertz Audio DS 38.323 +2.10.65 -0.01244 +24.49 -2.387.9 +0.6close4 Ω vs 8 Ω: amp load changes · 300 W vs 400 W: lower power handling · Xmax 9 mm < 11.3 mm: lower excursion-limited SPL+
Dayton Audio IB385-821.5 +0.60.588 -0.07248.9 +29.312.4 +1.189.8 +2.5close+
Rockford Fosgate P3D4-1522.4 +1.50.566 -0.09155.8 -63.811 -0.387.3 =usableXmax 11 mm < 11.3 mm: lower excursion-limited SPL+
Rockford Fosgate P1S4-1523 +2.10.55 -0.1191.5 -28.19 -2.387.3 =usable4 Ω vs 8 Ω: amp load changes · 250 W vs 400 W: lower power handling · Xmax 9 mm < 11.3 mm: lower excursion-limited SPL+
Rockford Fosgate P1S2-1523 +2.10.55 -0.1191.5 -28.19 -2.387.4 +0.1usable2 Ω vs 8 Ω: amp load changes · 250 W vs 400 W: lower power handling · Xmax 9 mm < 11.3 mm: lower excursion-limited SPL+
Oxygen AIR2 38022.7 +1.80.543 -0.11202.2 -17.411.5 +0.291.6 +4.3usable4 Ω vs 8 Ω: amp load changes+
Rockford Fosgate P115S424 +3.10.62 -0.04172 -47.68 -3.387.3 =usable4 Ω vs 8 Ω: amp load changes · 200 W vs 400 W: lower power handling · Xmax 8 mm < 11.3 mm: lower excursion-limited SPL+
Soundstream R1-1523.7 +2.80.62 -0.04136.6 -8317.2 +5.987.2 -0.1usable+
MTX Audio RT15-0420 -0.90.479 -0.18223 +3.410.3 -190.8 +3.5usable4 Ω vs 8 Ω: amp load changes · 300 W vs 400 W: lower power handling · Xmax 10.3 mm < 11.3 mm: lower excursion-limited SPL+
GRS 15SSW-4HE20.7 -0.20.487 -0.17196.6 -239.5 -1.889.8 +2.5usable300 W vs 400 W: lower power handling · Xmax 9.5 mm < 11.3 mm: lower excursion-limited SPL+

Compare the closest 3 against the P2D4-15 →

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.