RCF L12/854K

12" · 8 Ω · 350 W · 97.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	67 Hz
Qts	0.38
Qes	0.428
Qms	3.4
Vas	58 L
Sd	530 cm²
Xmax	2 mm
Re	5.02 Ω
Bl	13.7 T·m
Mms	38 g
Pe	350 W
Sensitivity	97.9 dB

Alignment hint

EBP	157 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 23.6 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 12/854K	67 =	0.382 =	58 =	3 +1	100.1 +2.2	close	200 W vs 350 W: lower power handling	+
Peerless FSL-1225R02-08	59 -8	0.407 +0.03	59.4 +1.4	2.5 +0.5	98 +0.1	close		+
18 Sound PWX12	61.3 -5.7	0.341 -0.04	56.2 -1.8	2.9 +0.9	98.6 +0.7	close	200 W vs 350 W: lower power handling	+
Beyma 12GU	70 +3	0.475 +0.09	60 +2	2 =	98.3 +0.4	close	80 W vs 350 W: lower power handling	+
HH Electronics B12L	64 -3	0.382 =	44.8 -13.2	3.4 +1.4	97.4 -0.5	close	200 W vs 350 W: lower power handling	+
Radian 5212B	62 -5	0.42 +0.04	58.4 +0.4	5.4 +3.4	98.2 +0.3	close		+
Celestion TF 1225CX	63.5 -3.5	0.358 -0.02	45.1 -12.9	2.5 +0.5	98.1 +0.2	close	250 W vs 350 W: lower power handling	+
Fane F90	70 +3	0.382 =	61 +3	1.5 -0.5	100.2 +2.3	close	90 W vs 350 W: lower power handling · Xmax 1.5 mm < 2 mm: lower excursion-limited SPL	+
RCF L12P520	65 -2	0.37 -0.01	47 -11	4 +2	97 -0.9	close	125 W vs 350 W: lower power handling	+
Celestion BN12-300S8	69.3 +2.3	0.392 +0.01	43.5 -14.5	2.5 +0.5	98.8 +0.9	close		+

Compare the closest 3 against the L12/854K →

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.