RCF LF12X401

12" · 8 Ω · 1000 W · 96.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	45 Hz
Qts	0.27
Qes	0.28
Qms	8
Vas	50 L
Sd	500 cm²
Xmax	9 mm
Re	5.2 Ω
Bl	26.1 T·m
Mms	105 g
Pe	1000 W
Sensitivity	96.5 dB

Alignment hint

EBP	161 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 8.5 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
Beyma 12 P1000/Nd	47 +2	0.26 -0.01	49 -1	8 -1	96 -0.5	close	Xmax 8 mm < 9 mm: lower excursion-limited SPL	+
Beyma 12P1000ND	47 +2	0.26 -0.01	49 -1	8 -1	94.6 -1.9	close	450 W vs 1000 W: lower power handling · Xmax 8 mm < 9 mm: lower excursion-limited SPL	+
18 Sound 12LW1400	45 =	0.3 +0.03	55 +5	8.25 -0.75	96 -0.5	close	Xmax 8.25 mm < 9 mm: lower excursion-limited SPL	+
Beyma 12SW1300ND	45 =	0.264 -0.01	45 -5	7 -2	95.9 -0.6	close	Xmax 7 mm < 9 mm: lower excursion-limited SPL	+
18 Sound 12NLW9410	42 -3	0.26 -0.01	55 +5	11 +2	95 -1.5	close		+
B&C 12NDL88	51 +6	0.27 =	52 +2	8 -1	98 +1.5	close	700 W vs 1000 W: lower power handling · Xmax 8 mm < 9 mm: lower excursion-limited SPL	+
B&C 12PS100	44 -1	0.27 =	47 -3	8 -1	93 -3.5	close	700 W vs 1000 W: lower power handling · Xmax 8 mm < 9 mm: lower excursion-limited SPL	+
Beyma 12"LEX1300Nd	45 =	0.24 -0.03	43 -7	11 +2	96 -0.5	close		+
Faital PRO 12FX600	48 +3	0.24 -0.03	44.4 -5.6	9.9 +0.9	97 +0.5	close	700 W vs 1000 W: lower power handling	+
Sica 12 PNS 4	41.7 -3.3	0.31 +0.04	50.2 +0.2	9.5 +0.5	94.5 -2	close		+

Compare the closest 3 against the LF12X401 →

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.