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Alpine SWX-1243D Type-X

12" · 8 Ω · 1000 W · 84.2 dB · datasheet ↗

Thiele-Small parameters

Nominal size12"
Impedance8 Ω
Fs29 Hz
Qts0.59
Qes0.64
Qms7.48
Vas38 L
Sd529 cm²
Xmax10.8 mm
Re7 Ω
Bl24.9 T·m
Mms310.9 g
Pe1000 W
Sensitivity84.2 dB

Alignment hint

EBP45 · sealed
Sealed Vb (Qtc ≈ 0.71)≈ 87.1 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
American Bass DX 1235.6 +6.60.6 +0.0141.5 +3.512 +1.286.2 +2close4 Ω vs 8 Ω: amp load changes · 400 W vs 1000 W: lower power handling+
JL Audio 12TW1-432.35 +3.350.529 -0.0633.67 -4.3310 -0.885.15 +0.95usable4 Ω vs 8 Ω: amp load changes · 300 W vs 1000 W: lower power handling · Xmax 10 mm < 10.8 mm: lower excursion-limited SPL+
Rockford Fosgate T1D41229.2 +0.20.613 +0.0255.8 +17.810.9 +0.185.8 +1.6usable+
Dayton Audio UM12-22 v201726.2 -2.80.594 =46.8 +8.89.9 -0.986.7 +2.5usable4 Ω vs 8 Ω: amp load changes · 600 W vs 1000 W: lower power handling · Xmax 9.9 mm < 10.8 mm: lower excursion-limited SPL+
Hifonics OLM800D429 =0.525 -0.0641 +37.5 -3.384.9 +0.7usableXmax 7.5 mm < 10.8 mm: lower excursion-limited SPL+
JL Audio 12TW1-235 +60.577 -0.0128.54 -9.4610 -0.885.07 +0.87usable2 Ω vs 8 Ω: amp load changes · 300 W vs 1000 W: lower power handling · Xmax 10 mm < 10.8 mm: lower excursion-limited SPL+
Pioneer TS-SW124D(PREMIER)31.7 +2.70.55 -0.0428.062 -9.948.6 -2.283.9 -0.3usable4 Ω vs 8 Ω: amp load changes · 300 W vs 1000 W: lower power handling · Xmax 8.6 mm < 10.8 mm: lower excursion-limited SPL+
Alpine SWR-1242D 1229 =0.47 -0.1245 +79.1 -1.785.7 +1.5usableXmax 9.1 mm < 10.8 mm: lower excursion-limited SPL+
Orion Audio H2 12.433.9 +4.90.61 +0.0228.35 -9.6529 +18.284.1 -0.1usable+
Rockford Fosgate T0D41226 -30.529 -0.0655.1 +17.110.7 -0.185.3 +1.1usable700 W vs 1000 W: lower power handling · Xmax 10.7 mm < 10.8 mm: lower excursion-limited SPL+

Compare the closest 3 against the SWX-1243D Type-X →

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.