Alpine SWR-12D2 vp

12" · 8 Ω · 750 W · 87.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	27 Hz
Qts	0.441
Qes	0.47
Qms	7.1
Vas	46 L
Sd	479 cm²
Xmax	10 mm
Re	4 Ω
Bl	18.7 T·m
Mms	242.9 g
Pe	750 W
Sensitivity	87.8 dB

Alignment hint

EBP	57 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 29.3 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
TC Sounds LMS R12	28 +1	0.43 -0.01	39 -7	10.8 +0.8	87.7 -0.1	close	4 Ω vs 8 Ω: amp load changes	+
Focal E30KX	29 +2	0.454 +0.01	50 +4	10.7 +0.7	86.9 -0.9	close		+
Focal SUB30KXE	29 +2	0.454 +0.01	50 +4	10.8 +0.8	86.9 -0.9	close		+
Rockford Fosgate T0D212	25.3 -1.7	0.473 +0.03	55 +9	10.5 +0.5	88 +0.2	close	4 Ω vs 8 Ω: amp load changes	+
Alpine SWR-1242D 12	29 +2	0.47 +0.03	45 -1	9.1 -0.9	85.7 -2.1	close	Xmax 9.1 mm < 10 mm: lower excursion-limited SPL	+
Ground Zero GZRW 12XD-AL	29 +2	0.451 +0.01	52 +6	9.2 -0.8	86.1 -1.7	close	500 W vs 750 W: lower power handling · Xmax 9.2 mm < 10 mm: lower excursion-limited SPL	+
Earthquake Sound SUBZERO-12	26.8 -0.2	0.424 -0.02	58.1 +12.1	12.7 +2.7	86.2 -1.6	close		+
MTX Audio TX612	27 =	0.393 -0.05	42.7 -3.3	9.7 -0.3	91 +3.2	close	4 Ω vs 8 Ω: amp load changes · Xmax 9.7 mm < 10 mm: lower excursion-limited SPL	+
Dayton Audio SS12-22	27 =	0.351 -0.09	49.4 +3.4	9.6 -0.4	88.1 +0.3	close	Xmax 9.6 mm < 10 mm: lower excursion-limited SPL	+
Alpine 1242D	29 +2	0.47 +0.03	45 -1	9.1 -0.9	91.4 +3.6	close	4 Ω vs 8 Ω: amp load changes · Xmax 9.1 mm < 10 mm: lower excursion-limited SPL	+

Compare the closest 3 against the SWR-12D2 vp →

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.