Alpine SWR-1242D 12

12" · 8 Ω · 1000 W · 85.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	29 Hz
Qts	0.47
Qes	0.5
Qms	7.89
Vas	45 L
Sd	480 cm²
Xmax	9.1 mm
Re	7.4 Ω
Bl	24.1 T·m
Mms	216.2 g
Pe	1000 W
Sensitivity	85.7 dB

Alignment hint

EBP	58 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 35.6 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
Ground Zero GZRW 12XD-AL	29 =	0.451 -0.02	52 +7	9.2 +0.1	86.1 +0.4	close	500 W vs 1000 W: lower power handling	+
Focal E30KX	29 =	0.454 -0.02	50 +5	10.7 +1.6	86.9 +1.2	close		+
Focal SUB30KXE	29 =	0.454 -0.02	50 +5	10.8 +1.7	86.9 +1.2	close		+
Alpine 1242D	29 =	0.47 =	45 =	9.1 =	91.4 +5.7	close	4 Ω vs 8 Ω: amp load changes	+
Alpine SWR-12D2 vp	27 -2	0.441 -0.03	46 +1	10 +0.9	87.8 +2.1	close	750 W vs 1000 W: lower power handling	+
Hertz Audio HX 300	33 +4	0.47 =	49.62 +4.62	14 +4.9	87.1 +1.4	close	4 Ω vs 8 Ω: amp load changes · 600 W vs 1000 W: lower power handling	+
Audiomobile ELITE 2212	28 -1	0.48 +0.01	59.46 +14.46	12.7 +3.6	85.8 +0.1	close	4 Ω vs 8 Ω: amp load changes · 600 W vs 1000 W: lower power handling	+
Hifonics OLM800D4	29 =	0.525 +0.06	41 -4	7.5 -1.6	84.9 -0.8	close	Xmax 7.5 mm < 9.1 mm: lower excursion-limited SPL	+
TC Sounds LMS R12	28 -1	0.43 -0.04	39 -6	10.8 +1.7	87.7 +2	close	4 Ω vs 8 Ω: amp load changes	+
Rockford Fosgate P3D4-12	27.7 -1.3	0.517 +0.05	57.7 +12.7	9.4 +0.3	86.3 +0.6	close	600 W vs 1000 W: lower power handling	+

Compare the closest 3 against the SWR-1242D 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.