Focal SUB P25

10" · 4 Ω · 250 W · 89.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	10"
Impedance	4 Ω
Fs	48 Hz
Qts	0.621
Qes	0.71
Qms	4.93
Vas	16 L
Sd	346.4 cm²
Xmax	4.1 mm
Re	3.6 Ω
Bl	13.3 T·m
Mms	115.4 g
Pe	250 W
Sensitivity	89.4 dB

Alignment hint

EBP	68 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 54 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
Fusion PF-SW100D4	45.3 -2.7	0.642 +0.02	19.3 +3.3	5.8 +1.7	88.1 -1.3	close	8 Ω vs 4 Ω: amp load changes	+
Auditor 250 S	42.1 -5.9	0.631 +0.01	20.5 +4.5	5 +0.9	89 -0.4	close		+
Skar Audio EV-10 S2	47.5 -0.5	0.69 +0.07	15.2 -0.8	8.5 +4.4	85.1 -4.3	usable	2 Ω vs 4 Ω: amp load changes · 150 W vs 250 W: lower power handling	+
Focal 27 V2	38.5 -9.5	0.629 +0.01	21.3 +5.3	5.5 +1.4	90.1 +0.7	usable		+
hertz Hertz Audio HX250 vp	47.5 -0.5	0.488 -0.13	12.3 -3.7	3.7 -0.4	89.2 -0.2	usable	Xmax 3.7 mm < 4.1 mm: lower excursion-limited SPL	+
Pioneer TS-W257D4 DVC	39.7 -8.3	0.546 -0.07	18.2 +2.2	5.3 +1.2	92.2 +2.8	usable	2 Ω vs 4 Ω: amp load changes	+
Sony XS-L104P5B	37.7 -10.3	0.569 -0.05	19.3 +3.3	6 +1.9	87.8 -1.6	usable		+
JBL 1000GTI	62 +14	0.64 +0.02	19 +3	5.97 +1.87	86 -3.4	usable		+
Focal 27 KX	48 =	0.908 +0.29	14.9 -1.1	4.5 +0.4	86.7 -2.7	usable	8 Ω vs 4 Ω: amp load changes	+
P.Audio TM-10	55 +7	0.572 -0.05	9.9 -6.1	4 -0.1	89.8 +0.4	usable	Xmax 4 mm < 4.1 mm: lower excursion-limited SPL	+

Compare the closest 3 against the SUB P25 →

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.