Alpine SWS-1241

12" · 4 Ω · 200 W · 90.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	30 Hz
Qts	0.563
Qes	0.6
Qms	9.26
Vas	65 L
Sd	490.9 cm²
Xmax	6.7 mm
Re	3.6 Ω
Bl	12.9 T·m
Mms	146.3 g
Pe	200 W
Sensitivity	90.1 dB

Alignment hint

EBP	50 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 112.6 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
MTX Audio T5512-04	29.3 -0.7	0.583 +0.02	66.9 +1.9	7.3 +0.6	89.8 -0.3	close		+
JBL STAGE 1210	31.7 +1.7	0.55 -0.01	64.6 -0.4	6.6 -0.1	90.8 +0.7	close	Xmax 6.6 mm < 6.7 mm: lower excursion-limited SPL	+
MTX Audio RT12-04	28 -2	0.535 -0.03	68 +3	7.5 +0.8	90.1 =	close		+
MTX Audio XT12-04	33 +3	0.56 =	66 +1	6.5 -0.2	91.7 +1.6	close	Xmax 6.5 mm < 6.7 mm: lower excursion-limited SPL	+
Wavecor SW310WA02	27.5 -2.5	0.52 -0.04	64.5 -0.5	7.4 +0.7	89.9 -0.2	close		+
Focal P30	31.3 +1.3	0.508 -0.05	63.9 -1.1	7.4 +0.7	91 +0.9	close		+
Boston Acoustics G21244	28 -2	0.579 +0.02	65 =	8.2 +1.5	92.4 +2.3	close	2 Ω vs 4 Ω: amp load changes	+
Wavecor SW312WA04	29 -1	0.569 +0.01	61 -4	7.5 +0.8	86.8 -3.3	close	8 Ω vs 4 Ω: amp load changes	+
Monacor BLACKBASS-12 4 Ohms	29 -1	0.482 -0.08	61 -4	7.5 +0.8	90.1 =	close		+
Phoenix Gold RYVAL V12D	30 =	0.552 -0.01	81.9 +16.9	6.4 -0.3	91.4 +1.3	close	150 W vs 200 W: lower power handling · Xmax 6.4 mm < 6.7 mm: lower excursion-limited SPL	+

Compare the closest 3 against the SWS-1241 →

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.