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Alpine SWE-1242

12" · 4 Ω · 250 W · 85.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size12"
Impedance4 Ω
Fs31 Hz
Qts0.66
Qes0.708
Qms9.68
Vas61 L
Sd491 cm²
Xmax11.7 mm
Re3.6 Ω
Bl12.08 T·m
Mms147.3 g
Pe250 W
Sensitivity85.9 dB

Alignment hint

EBP44 · sealed
Sealed Vb (Qtc ≈ 0.71)≈ 412.6 L

EBP < 50: favours a sealed (closed) alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
Soundstream STEALTH-12429.98 -1.020.687 +0.0359.5 -1.513 +1.384.8 -1.1close8 Ω vs 4 Ω: amp load changes+
Alpine SWE-124131 =0.653 -0.0161 =11.3 -0.489.6 +3.7closeXmax 11.3 mm < 11.7 mm: lower excursion-limited SPL+
JL Audio 12W0V3-432.09 +1.090.67 +0.0171.64 +10.6411.4 -0.385.64 -0.26closeXmax 11.4 mm < 11.7 mm: lower excursion-limited SPL+
Rockford Fosgate T1D41229.2 -1.80.613 -0.0555.8 -5.210.9 -0.885.8 -0.1close8 Ω vs 4 Ω: amp load changes · Xmax 10.9 mm < 11.7 mm: lower excursion-limited SPL+
Infinity Kappa 123WDSSI 2Ohm34.2 +3.20.778 +0.1258.6153 -2.3810.2 -1.586.0429 +0.14usable2 Ω vs 4 Ω: amp load changes · Xmax 10.2 mm < 11.7 mm: lower excursion-limited SPL+
Rockford Fosgate R2SD4-1230.3 -0.70.653 -0.0165.4 +4.46.9 -4.886.7 +0.8usable8 Ω vs 4 Ω: amp load changes · Xmax 6.9 mm < 11.7 mm: lower excursion-limited SPL+
Pioneer TS-W251R28.9 -2.10.68 +0.0257.86 -3.147.8 -3.984.6 -1.3usable120 W vs 250 W: lower power handling · Xmax 7.8 mm < 11.7 mm: lower excursion-limited SPL+
Cerwin-Vega VEGA 12430.3 -0.70.612 -0.0560.3 -0.77 -4.786.4 +0.5usable8 Ω vs 4 Ω: amp load changes · Xmax 7 mm < 11.7 mm: lower excursion-limited SPL+
JL Audio 12W0V3-428.4 -2.60.67 +0.0171.6 +10.69.3 -2.488.3 +2.4usable8 Ω vs 4 Ω: amp load changes · Xmax 9.3 mm < 11.7 mm: lower excursion-limited SPL+
Hertz Audio ES 300.535 +40.66 =48.5 -12.59 -2.786.6 +0.7usableXmax 9 mm < 11.7 mm: lower excursion-limited SPL+

Compare the closest 3 against the SWE-1242 →

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.