RCF LF 18G401

18" · 8 Ω · 900 W · 99.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	33 Hz
Qts	0.289
Qes	0.3
Qms	7.6
Vas	268 L
Sd	1220 cm²
Xmax	8.2 mm
Re	4.8 Ω
Bl	24.5 T·m
Mms	181.1 g
Pe	900 W
Sensitivity	99.3 dB

Alignment hint

EBP	110 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 53.7 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 LF18G401	33 =	0.29 =	268 =	9 +0.8	98 -1.3	close		+
RCF LF18G908	33 =	0.29 =	268 =	9 +0.8	98 -1.3	close		+
B&C 18 PZB 100 (prodance)	33.7 +0.7	0.289 =	263 -5	7.6 -0.6	99 -0.3	close	700 W vs 900 W: lower power handling · Xmax 7.6 mm < 8.2 mm: lower excursion-limited SPL	+
PHL Audio 7010	35 +2	0.288 =	260 -8	7.7 -0.5	99.1 -0.2	close	Xmax 7.7 mm < 8.2 mm: lower excursion-limited SPL	+
PHL Audio 7070	35 +2	0.288 =	260 -8	7.7 -0.5	99.1 -0.2	close	Xmax 7.7 mm < 8.2 mm: lower excursion-limited SPL	+
PHL Audio 7090 v2012	34 +1	0.297 +0.01	260 -8	7.9 -0.3	98.6 -0.7	close	Xmax 7.9 mm < 8.2 mm: lower excursion-limited SPL	+
Faital PRO 18FX600	32 -1	0.3 +0.01	257.3 -10.7	11.25 +3.05	99 -0.3	close	700 W vs 900 W: lower power handling	+
B&C 18 TBX 46	31 -2	0.277 -0.01	270 +2	9 +0.8	98.2 -1.1	close		+
18 Sound 18LW1250	35 +2	0.271 -0.02	268 =	8.7 +0.5	100.2 +0.9	close		+
18 Sound 18NLW9400	33 =	0.26 -0.03	268 =	9.5 +1.3	98 -1.3	close		+

Compare the closest 3 against the LF 18G401 →

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.