Focal 38VX

15" · 4 Ω · 225 W · 96.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	22.3 Hz
Qts	0.279
Qes	0.29
Qms	7.2
Vas	347 L
Sd	829.6 cm²
Xmax	8.2 mm
Re	3.4 Ω
Bl	15.3 T·m
Mms	142.3 g
Pe	225 W
Sensitivity	96.9 dB

Alignment hint

EBP	77 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 64 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
Monacor SPH-390TC vp1	22.7 +0.4	0.276 =	351 +4	6.4 -1.8	97.3 +0.4	close	150 W vs 225 W: lower power handling · Xmax 6.4 mm < 8.2 mm: lower excursion-limited SPL	+
Audiotechnology 15F1022510KAP	22 -0.3	0.288 +0.01	410 +63	8.5 +0.3	94.9 -2	close	8 Ω vs 4 Ω: amp load changes	+
Magnat OMEGA 380	21.3 -1	0.247 -0.03	375 +28	12 +3.8	96.9 =	close		+
Rockford Fosgate PWR-415	24 +1.7	0.283 =	334 -13	6.2 -2	97.4 +0.5	close	Xmax 6.2 mm < 8.2 mm: lower excursion-limited SPL	+
Dayton Audio 15LF ODEUM	25.5 +3.2	0.26 -0.02	331.3 -15.7	9.3 +1.1	96 -0.9	close	8 Ω vs 4 Ω: amp load changes	+
Dayton Audio APOLLO 15LF	25.5 +3.2	0.26 -0.02	331 -16	9.3 +1.1	96 -0.9	close	8 Ω vs 4 Ω: amp load changes	+
Beyma 15k200	27 +4.7	0.262 -0.02	345 -2	7.5 -0.7	97 +0.1	close	8 Ω vs 4 Ω: amp load changes · Xmax 7.5 mm < 8.2 mm: lower excursion-limited SPL	+
Beyma SM-115/K	27 +4.7	0.253 -0.03	345 -2	8 -0.2	97.5 +0.6	close	8 Ω vs 4 Ω: amp load changes · Xmax 8 mm < 8.2 mm: lower excursion-limited SPL	+
Audiotechnology FLEXUNIT 15 F 102 25 10 KAP	22 -0.3	0.29 +0.01	410 +63	8.6 +0.4	93.5 -3.4	close	8 Ω vs 4 Ω: amp load changes	+
Magnat SUB 400 SUPREME	21 -1.3	0.228 -0.05	330 -17	9.5 +1.3	96.7 -0.2	close		+

Compare the closest 3 against the 38VX →

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.