Rockford Fosgate T0D212

12" · 4 Ω · 700 W · 88 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	25.3 Hz
Qts	0.473
Qes	0.51
Qms	6.5
Vas	55 L
Sd	548 cm²
Xmax	10.5 mm
Re	3.5 Ω
Bl	18.2 T·m
Mms	302.9 g
Pe	700 W
Sensitivity	88 dB

Alignment hint

EBP	50 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 44.5 L

EBP 50-100: works in either a sealed or ported 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 TIT320C-4 Titanic Mk III	24.9 -0.4	0.458 -0.01	64.3 +9.3	10.5 =	89.2 +1.2	close	500 W vs 700 W: lower power handling	+
Rockford Fosgate P3D2-12	26.5 +1.2	0.491 +0.02	57.7 +2.7	9.5 -1	89 +1	close	Xmax 9.5 mm < 10.5 mm: lower excursion-limited SPL	+
Rockford Fosgate T1D212	28 +2.7	0.522 +0.05	55.8 +0.8	10.9 +0.4	89.1 +1.1	close		+
Rockford Fosgate T0D412	26 +0.7	0.529 +0.06	55.1 +0.1	10.7 +0.2	85.3 -2.7	close	8 Ω vs 4 Ω: amp load changes	+
Audiomobile ELITE 2212	28 +2.7	0.48 +0.01	59.46 +4.46	12.7 +2.2	85.8 -2.2	close		+
Focal E30KX	29 +3.7	0.454 -0.02	50 -5	10.7 +0.2	86.9 -1.1	close	8 Ω vs 4 Ω: amp load changes	+
Focal SUB30KXE	29 +3.7	0.454 -0.02	50 -5	10.8 +0.3	86.9 -1.1	close	8 Ω vs 4 Ω: amp load changes	+
Alpine SWR-12D2 vp	27 +1.7	0.441 -0.03	46 -9	10 -0.5	87.8 -0.2	close	8 Ω vs 4 Ω: amp load changes · Xmax 10 mm < 10.5 mm: lower excursion-limited SPL	+
Earthquake Sound SUBZERO-12	26.8 +1.5	0.424 -0.05	58.1 +3.1	12.7 +2.2	86.2 -1.8	close	8 Ω vs 4 Ω: amp load changes	+
Rockford Fosgate P3D4-12	27.7 +2.4	0.517 +0.04	57.7 +2.7	9.4 -1.1	86.3 -1.7	close	8 Ω vs 4 Ω: amp load changes · Xmax 9.4 mm < 10.5 mm: lower excursion-limited SPL	+

Compare the closest 3 against the T0D212 →

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.