Rockford Fosgate P3D4-12

12" · 8 Ω · 600 W · 86.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	27.7 Hz
Qts	0.517
Qes	0.57
Qms	5.6
Vas	57.7 L
Sd	570 cm²
Xmax	9.4 mm
Re	6.4 Ω
Bl	22.6 T·m
Mms	260.6 g
Pe	600 W
Sensitivity	86.3 dB

Alignment hint

EBP	49 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 66.3 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
Audiomobile ELITE 2212	28 +0.3	0.48 -0.04	59.46 +1.76	12.7 +3.3	85.8 -0.5	close	4 Ω vs 8 Ω: amp load changes	+
Rockford Fosgate T0D412	26 -1.7	0.529 +0.01	55.1 -2.6	10.7 +1.3	85.3 -1	close		+
Rockford Fosgate T1D212	28 +0.3	0.522 +0.01	55.8 -1.9	10.9 +1.5	89.1 +2.8	close	4 Ω vs 8 Ω: amp load changes	+
JL Audio 13TW5V2-2	27.6 -0.1	0.526 +0.01	60.3 +2.6	9 -0.4	89.2 +2.9	close	4 Ω vs 8 Ω: amp load changes · Xmax 9 mm < 9.4 mm: lower excursion-limited SPL	+
Rockford Fosgate P3D2-12	26.5 -1.2	0.491 -0.03	57.7 =	9.5 +0.1	89 +2.7	close	4 Ω vs 8 Ω: amp load changes	+
Audio System HX12 SQ	28.2 +0.5	0.5 -0.02	68 +10.3	11.8 +2.4	86.1 -0.2	close	4 Ω vs 8 Ω: amp load changes · 450 W vs 600 W: lower power handling	+
JL Audio 12W1V3-2	26.55 -1.15	0.52 =	72 +14.3	11 +1.6	85.9 -0.4	close	2 Ω vs 8 Ω: amp load changes · 300 W vs 600 W: lower power handling	+
Infinity KAPPA 1200W	26.5 -1.2	0.496 -0.02	64.47 +6.77	12.75 +3.35	85.1 -1.2	close	2 Ω vs 8 Ω: amp load changes	+
Powerbass S-1204D	31 +3.3	0.5 -0.02	65 +7.3	9.5 +0.1	87.2 +0.9	close	4 Ω vs 8 Ω: amp load changes · 300 W vs 600 W: lower power handling	+
Sound Storm Labs CR12D	30.7 +3	0.522 +0.01	66.9 +9.2	10.3 +0.9	87.5 +1.2	close		+

Compare the closest 3 against the P3D4-12 →

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.