Rockford Fosgate T0D215

15" · 4 Ω · 800 W · 90.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	25.5 Hz
Qts	0.438
Qes	0.47
Qms	6.5
Vas	94.4 L
Sd	845 cm²
Xmax	9.3 mm
Re	3.4 Ω
Bl	21.9 T·m
Mms	413 g
Pe	800 W
Sensitivity	90.9 dB

Alignment hint

EBP	54 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 58.8 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
JL Audio 13W7AE-D1.5	23.5 -2	0.448 +0.01	104.3 +9.9	12.1 +2.8	91.7 +0.8	close		+
Dayton Audio SS15-22	27 +1.5	0.388 -0.05	98 +3.6	10.3 +1	90.4 -0.5	close	8 Ω vs 4 Ω: amp load changes	+
Stereo Integrity SQL-15 15	23.8 -1.7	0.418 -0.02	115 +20.6	12.1 +2.8	90.9 =	close		+
MTX Audio TX615	28 +2.5	0.425 -0.01	89.8 -4.6	9.5 +0.2	94.3 +3.4	close		+
Dayton Audio RSS390HO-4	24.2 -1.3	0.384 -0.05	109.7 +15.3	9.6 +0.3	91.5 +0.6	close		+
MTX Audio T615-22	25.7 +0.2	0.431 -0.01	110 +15.6	7.1 -2.2	92.1 +1.2	close	450 W vs 800 W: lower power handling · Xmax 7.1 mm < 9.3 mm: lower excursion-limited SPL	+
Rockford Fosgate T0D415	26.2 +0.7	0.521 +0.08	94.4 =	9.7 +0.4	88 -2.9	close	8 Ω vs 4 Ω: amp load changes	+
TC Sounds LMS R15	23.6 -1.9	0.446 +0.01	123 +28.6	12.1 +2.8	90.2 -0.7	close		+
Alpine SWR-1542D	23 -2.5	0.452 +0.01	100 +5.6	10.3 +1	86.7 -4.2	close	8 Ω vs 4 Ω: amp load changes	+
Stereo Integrity RM-15 15	29 +3.5	0.498 +0.06	89.7 -4.7	9.7 +0.4	89.2 -1.7	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the T0D215 →

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.