RCF LF 18X401

18" · 8 Ω · 1500 W · 97.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	30 Hz
Qts	0.298
Qes	0.31
Qms	7.4
Vas	274 L
Sd	1220 cm²
Xmax	11.4 mm
Re	5.4 Ω
Bl	26.5 T·m
Mms	214.3 g
Pe	1500 W
Sensitivity	97.5 dB

Alignment hint

EBP	97 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 59.2 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
RCF LF18X401	30 =	0.3 =	274 =	12 +0.6	97.5 =	close		+
RCF LF18Y402	30 =	0.3 =	274 =	12 +0.6	97.5 =	close		+
Faital PRO 18FX600	32 +2	0.3 =	257.3 -16.7	11.25 -0.15	99 +1.5	close	700 W vs 1500 W: lower power handling · Xmax 11.25 mm < 11.4 mm: lower excursion-limited SPL	+
BMS 18S450	29 -1	0.31 +0.01	281 +7	12 +0.6	95 -2.5	close		+
BMS 18N840V2	28.5 -1.5	0.314 +0.02	288 +14	10 -1.4	97.1 -0.4	close	Xmax 10 mm < 11.4 mm: lower excursion-limited SPL	+
Lavoce SAF184.03	30 =	0.32 +0.02	260 -14	13 +1.6	94.9 -2.6	close		+
RCF LF18N405	30 =	0.32 +0.02	227 -47	14 +2.6	97 -0.5	close		+
18 Sound 18LW1400	31 +1	0.29 -0.01	297 +23	9 -2.4	98 +0.5	close	1000 W vs 1500 W: lower power handling · Xmax 9 mm < 11.4 mm: lower excursion-limited SPL	+
RCF LF18X451	30 =	0.28 -0.02	220 -54	14 +2.6	97 -0.5	close		+
B&C 18 TBX 46	31 +1	0.277 -0.02	270 -4	9 -2.4	98.2 +0.7	close	1000 W vs 1500 W: lower power handling · Xmax 9 mm < 11.4 mm: lower excursion-limited SPL	+

Compare the closest 3 against the LF 18X401 →

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.