Focal 27 KX

10" · 8 Ω · 300 W · 86.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	10"
Impedance	8 Ω
Fs	48 Hz
Qts	0.908
Qes	0.97
Qms	14.19
Vas	14.9 L
Sd	314.2 cm²
Xmax	4.5 mm
Re	4.6 Ω
Bl	12.1 T·m
Mms	101.9 g
Pe	300 W
Sensitivity	86.7 dB

Alignment hint

EBP	49 · sealed
Sealed Vb (Qtc ≈ 0.71)	Qts too high

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
Skar Audio EV-10 S4	50.9 +2.9	0.76 -0.15	14 -0.9	8.5 +4	85.2 -1.5	usable	4 Ω vs 8 Ω: amp load changes · 150 W vs 300 W: lower power handling	+
Xtant X2 1044	37.2 -10.8	0.961 +0.05	15.9 +1	5.7 +1.2	88.5 +1.8	usable	2 Ω vs 8 Ω: amp load changes	+
Skar Audio EV-10 S2	47.5 -0.5	0.69 -0.22	15.2 +0.3	8.5 +4	85.1 -1.6	usable	2 Ω vs 8 Ω: amp load changes · 150 W vs 300 W: lower power handling	+
Pioneer TS-W261D4	46 -2	1.044 +0.14	17.7 +2.8	8.4 +3.9	89.9 +3.2	usable	4 Ω vs 8 Ω: amp load changes	+
Pioneer TS-SW2502S4	42 -6	0.97 +0.06	18.5 +3.6	6.5 +2	83 -3.7	usable	4 Ω vs 8 Ω: amp load changes	+
Pioneer TS-SW2501S4	41.6 -6.4	0.93 +0.02	10.3 -4.6	3.6 -0.9	84.9 -1.8	usable	4 Ω vs 8 Ω: amp load changes · Xmax 3.6 mm < 4.5 mm: lower excursion-limited SPL	+
Focal SUB P25	48 =	0.621 -0.29	16 +1.1	4.1 -0.4	89.4 +2.7	usable	4 Ω vs 8 Ω: amp load changes · Xmax 4.1 mm < 4.5 mm: lower excursion-limited SPL	+
Focal SUB25KXS	35 -13	0.812 -0.1	18 +3.1	7 +2.5	85 -1.7	usable	4 Ω vs 8 Ω: amp load changes	+
Audiobahn AW1051T	42.7 -5.3	0.82 -0.09	19.822 +4.92	13 +8.5	83.9 -2.8	usable	4 Ω vs 8 Ω: amp load changes	+
Sony XS-GTR101L	44 -4	0.72 -0.19	21 +6.1	6.9 +2.4	85.4 -1.3	usable	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 27 KX →

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.