JL Audio 12WX-4

12" · 4 Ω · 200 W · 90.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	27 Hz
Qts	0.562
Qes	0.596
Qms	9.97
Vas	94.5 L
Sd	496 cm²
Xmax	8.5 mm
Re	3.51 Ω
Bl	11.3 T·m
Mms	126.8 g
Pe	200 W
Sensitivity	90.5 dB

Alignment hint

EBP	45 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 162.1 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

Driver	Fs (Hz)	Qts	Vas (L)	Xmax (mm)	Sens (dB)	Fit	Notes	Compare
JBL GT3-12	28.2 +1.2	0.541 -0.02	100.5 +6	8.2 -0.3	91.8 +1.3	close	Xmax 8.2 mm < 8.5 mm: lower excursion-limited SPL	+
Rockford Fosgate P1S412	25 -2	0.537 -0.03	109 +14.5	9 +0.5	90.4 -0.1	close		+
Hertz Audio DS 30.3	29 +2	0.51 -0.05	94 -0.5	9 +0.5	87.7 -2.8	close		+
Cerwin-Vega HED-12 4	28 +1	0.565 =	105 +10.5	6 -2.5	90.7 +0.2	close	Xmax 6 mm < 8.5 mm: lower excursion-limited SPL	+
Rockford Fosgate P1S8-12	26 -1	0.593 +0.03	109 +14.5	9 +0.5	87.4 -3.1	close	8 Ω vs 4 Ω: amp load changes	+
Rockford Fosgate S2-124	27 =	0.498 -0.06	77 -17.5	10.7 +2.2	89.9 -0.6	close		+
American Bass SL 124	31.5 +4.5	0.543 -0.02	85.7 -8.8	8.5 =	88.3 -2.2	close		+
Peerless XXLS-P830845	27 =	0.517 -0.05	119.5 +25	7.6 -0.9	89.8 -0.7	close	8 Ω vs 4 Ω: amp load changes · Xmax 7.6 mm < 8.5 mm: lower excursion-limited SPL	+
Rockford Fosgate P112S4	25 -2	0.52 -0.04	110 +15.5	7.3 -1.2	90.6 +0.1	close	150 W vs 200 W: lower power handling · Xmax 7.3 mm < 8.5 mm: lower excursion-limited SPL	+
Dayton Audio RSS315HF-4	25 -2	0.489 -0.07	85.1 -9.4	10.1 +1.6	89.4 -1.1	close		+

Compare the closest 3 against the 12WX-4 →

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.