Focal 25 A4 vp

10" · 8 Ω · 200 W · 85.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	10"
Impedance	8 Ω
Fs	30.2 Hz
Qts	0.666
Qes	0.746
Qms	6.243
Vas	31.5 L
Sd	330.1 cm²
Xmax	4.2 mm
Re	4.14 Ω
Bl	11.9 T·m
Mms	134.9 g
Pe	200 W
Sensitivity	85.5 dB

Alignment hint

EBP	40 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 247.5 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
HiVi CS100B	31 +0.8	0.653 -0.01	34.2 +2.7	7 +2.8	86.8 +1.3	close	4 Ω vs 8 Ω: amp load changes	+
Focal 10WM	31 +0.8	0.683 +0.02	28 -3.5	9.2 +5	85.4 -0.1	close		+
Focal SUB10WM	31 +0.8	0.683 +0.02	28 -3.5	8.5 +4.3	86.5 +1	close	4 Ω vs 8 Ω: amp load changes	+
Alpine SWE-1042	33 +2.8	0.66 -0.01	33 +1.5	11.7 +7.5	84.1 -1.4	close	4 Ω vs 8 Ω: amp load changes	+
JL Audio 10W0V3-4	32.1 +1.9	0.604 -0.06	31 -0.5	8.7 +4.5	86.7 +1.2	close		+
Wavecor SW275BD01	30.8 +0.6	0.564 -0.1	31 -0.5	6.9 +2.7	87.2 +1.7	close	4 Ω vs 8 Ω: amp load changes	+
JL Audio 10W0V3-4	32.09 +1.89	0.604 -0.06	31 -0.5	11.4 +7.2	84.07 -1.43	close	4 Ω vs 8 Ω: amp load changes	+
Dynaudio ESOTEC MW182	40 +9.8	0.64 -0.03	34 +2.5	4.5 +0.3	86 +0.5	usable	4 Ω vs 8 Ω: amp load changes	+
Pioneer TS-W106M	32.7 +2.5	0.66 -0.01	32.2 +0.7	6.3 +2.1	92 +6.5	usable	4 Ω vs 8 Ω: amp load changes	+
Hertz Audio DS 250.3	36 +5.8	0.62 -0.05	29 -2.5	10 +5.8	84.8 -0.7	usable	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 25 A4 vp →

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.