RCF L 12/854K

12" · 8 Ω · 200 W · 100.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	67 Hz
Qts	0.382
Qes	0.43
Qms	3.4
Vas	58 L
Sd	530 cm²
Xmax	3 mm
Re	5 Ω
Bl	13.7 T·m
Mms	38.3 g
Pe	200 W
Sensitivity	100.1 dB

Alignment hint

EBP	156 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 23.9 L

EBP > 100: favours a ported (bass-reflex) 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
RCF L 12P520	65 -2	0.355 -0.03	49 -9	3.4 +0.4	99.6 -0.5	close		+
JBL 2023H	67 =	0.347 -0.04	48.8 -9.2	3.7 +0.7	99.8 -0.3	close		+
18 Sound PWX12	61.3 -5.7	0.341 -0.04	56.2 -1.8	2.9 -0.1	98.6 -1.5	close	Xmax 2.9 mm < 3 mm: lower excursion-limited SPL	+
Celestion BN12-300S4	61.2 -5.8	0.408 +0.03	56.9 -1.1	2.5 -0.5	101.2 +1.1	close	4 Ω vs 8 Ω: amp load changes · Xmax 2.5 mm < 3 mm: lower excursion-limited SPL	+
RCF L12/854K	67 =	0.38 =	58 =	2 -1	97.9 -2.2	close	Xmax 2 mm < 3 mm: lower excursion-limited SPL	+
Radian 5212B	62 -5	0.42 +0.04	58.4 +0.4	5.4 +2.4	98.2 -1.9	close		+
HH Electronics B12L	64 -3	0.382 =	44.8 -13.2	3.4 +0.4	97.4 -2.7	close		+
LaVoce FSF122.02	57 -10	0.374 -0.01	69.5 +11.5	3 =	98.4 -1.7	close	150 W vs 200 W: lower power handling	+
Beyma SM112 vp	57.8 -9.2	0.391 +0.01	64.6 +6.6	4.2 +1.2	97.7 -2.4	usable		+
RCF L12P520	65 -2	0.37 -0.01	47 -11	4 +1	97 -3.1	usable	125 W vs 200 W: lower power handling	+

Compare the closest 3 against the L 12/854K →

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.