Focal 33WX

12" · 4 Ω · 400 W · 94.2 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	32.5 Hz
Qts	0.349
Qes	0.36
Qms	11.75
Vas	73.1 L
Sd	551.6 cm²
Xmax	7.1 mm
Re	3.32 Ω
Bl	16.2 T·m
Mms	139.8 g
Pe	400 W
Sensitivity	94.2 dB

Alignment hint

EBP	90 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 23.5 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
Focal 33WX2	32.5 =	0.349 =	73.1 =	7.1 =	94.2 =	close		+
PHL Audio 4021 v2026	35 +2.5	0.348 =	70 -3.1	7.5 +0.4	92.7 -1.5	close	8 Ω vs 4 Ω: amp load changes	+
Auditor RIP 300P	28.9 -3.6	0.35 =	79.3 +6.2	8.8 +1.7	92.6 -1.6	close		+
Focal 33VX	34 +1.5	0.322 -0.03	66.5 -6.6	6.4 -0.7	94.7 +0.5	close	Xmax 6.4 mm < 7.1 mm: lower excursion-limited SPL	+
Atohm D300P04 v2008	29.7 -2.8	0.352 =	83.2 +10.1	6.4 -0.7	93.2 -1	close	200 W vs 400 W: lower power handling · Xmax 6.4 mm < 7.1 mm: lower excursion-limited SPL	+
Atohm D300P04 v2019	29.7 -2.8	0.352 =	83.2 +10.1	6.4 -0.7	93.2 -1	close	200 W vs 400 W: lower power handling · Xmax 6.4 mm < 7.1 mm: lower excursion-limited SPL	+
Magnat XTC300	30 -2.5	0.317 -0.03	81 +7.9	6.9 -0.2	93.8 -0.4	close	300 W vs 400 W: lower power handling · Xmax 6.9 mm < 7.1 mm: lower excursion-limited SPL	+
Pioneer TS-W305C	32.7 +0.2	0.34 -0.01	51.5 -21.6	7.1 =	93.4 -0.8	close		+
Magnat AD300	30 -2.5	0.411 +0.06	72 -1.1	7.3 +0.2	92.8 -1.4	close	300 W vs 400 W: lower power handling	+
Volt RV3143	34 +1.5	0.347 =	76 +2.9	5.2 -1.9	92.3 -1.9	close	8 Ω vs 4 Ω: amp load changes · 300 W vs 400 W: lower power handling · Xmax 5.2 mm < 7.1 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 33WX →

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.