hertz Hertz Audio HX250 vp

10" · 4 Ω · 250 W · 89.2 dB · datasheet ↗

Thiele-Small parameters

Nominal size	10"
Impedance	4 Ω
Fs	47.5 Hz
Qts	0.488
Qes	0.62
Qms	2.3
Vas	12.3 L
Sd	297 cm²
Xmax	3.7 mm
Re	3.2 Ω
Bl	13.2 T·m
Mms	113.2 g
Pe	250 W
Sensitivity	89.2 dB

Alignment hint

EBP	77 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 11.2 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 SUB P25	48 +0.5	0.621 +0.13	16 +3.7	4.1 +0.4	89.4 +0.2	usable		+
P.Audio TM-10	55 +7.5	0.572 +0.08	9.9 -2.4	4 +0.3	89.8 +0.6	usable		+
HiVi BS10L	43 -4.5	0.455 -0.03	10.1 -2.2	2.4 -1.3	87.8 -1.4	usable	150 W vs 250 W: lower power handling · Xmax 2.4 mm < 3.7 mm: lower excursion-limited SPL	+
Focal ACCESS 27A	41.3 -6.2	0.48 -0.01	21.2 +8.9	5 +1.3	90.8 +1.6	usable		+
Orion Audio HCCA 102	42.5 -5	0.45 -0.04	8.8 -3.5	8.9 +5.2	86.6 -2.6	usable		+
Focal 11W 7670	44.6 -2.9	0.45 -0.04	22.9 +10.6	4.2 +0.5	92.1 +2.9	usable	175 W vs 250 W: lower power handling	+
Pioneer TS-W257D4 DVC	39.7 -7.8	0.546 +0.06	18.2 +5.9	5.3 +1.6	92.2 +3	usable	2 Ω vs 4 Ω: amp load changes	+
Focal 11V 5552	40.5 -7	0.497 +0.01	24.1 +11.8	4.6 +0.9	90.8 +1.6	usable	175 W vs 250 W: lower power handling	+
LaVoce SSF102.50L	50 +2.5	0.475 -0.01	25.6 +13.3	5.7 +2	91.4 +2.2	usable	8 Ω vs 4 Ω: amp load changes	+
Focal 27 V1	39 -8.5	0.445 -0.04	21.4 +9.1	4.9 +1.2	90.4 +1.2	usable		+

Compare the closest 3 against the HX250 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.