Focal ACCESS 27A

10" · 4 Ω · 250 W · 90.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	10"
Impedance	4 Ω
Fs	41.3 Hz
Qts	0.48
Qes	0.54
Qms	4.35
Vas	21.2 L
Sd	330.1 cm²
Xmax	5 mm
Re	2.9 Ω
Bl	12.2 T·m
Mms	106.9 g
Pe	250 W
Sensitivity	90.8 dB

Alignment hint

EBP	76 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 18.1 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 27 V1	39 -2.3	0.445 -0.03	21.4 +0.2	4.9 -0.1	90.4 -0.4	close	Xmax 4.9 mm < 5 mm: lower excursion-limited SPL	+
Focal 11V 5552	40.5 -0.8	0.497 +0.02	24.1 +2.9	4.6 -0.4	90.8 =	close	175 W vs 250 W: lower power handling · Xmax 4.6 mm < 5 mm: lower excursion-limited SPL	+
Auditor 250 P	38.7 -2.6	0.454 -0.03	24.8 +3.6	5 =	90.3 -0.5	close		+
hertz Hertz Audio HX250	37 -4.3	0.444 -0.04	24 +2.8	5.3 +0.3	90.3 -0.5	close		+
Focal SUB25KXE	38 -3.3	0.52 +0.04	20 -1.2	8.2 +3.2	91.7 +0.9	close	2 Ω vs 4 Ω: amp load changes	+
Oxygen AIR2 250	36.4 -4.9	0.502 +0.02	22.4 +1.2	5.8 +0.8	88.3 -2.5	close		+
Focal 11W 7670	44.6 +3.3	0.45 -0.03	22.9 +1.7	4.2 -0.8	92.1 +1.3	close	175 W vs 250 W: lower power handling · Xmax 4.2 mm < 5 mm: lower excursion-limited SPL	+
Pioneer TS-W257D4 DVC	39.7 -1.6	0.546 +0.07	18.2 -3	5.3 +0.3	92.2 +1.4	close	2 Ω vs 4 Ω: amp load changes	+
LaVoce SSF102.50L	50 +8.7	0.475 -0.01	25.6 +4.4	5.7 +0.7	91.4 +0.6	close	8 Ω vs 4 Ω: amp load changes	+
Focal 27 V2	38.5 -2.8	0.629 +0.15	21.3 +0.1	5.5 +0.5	90.1 -0.7	usable		+

Compare the closest 3 against the ACCESS 27A →

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.