RCF LF 18N405

18" · 8 Ω · 1500 W · 96.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	30 Hz
Qts	0.324
Qes	0.34
Qms	7
Vas	227 L
Sd	1220 cm²
Xmax	10.8 mm
Re	4.9 Ω
Bl	26.5 T·m
Mms	258.7 g
Pe	1500 W
Sensitivity	96.7 dB

Alignment hint

EBP	88 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 60.3 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 LF18N405	30 =	0.32 =	227 =	14 +3.2	97 +0.3	close		+
BMS 18N850vv2	29.8 -0.2	0.33 +0.01	243 +16	12 +1.2	95 -1.7	close		+
Ciare NDH18_4S	31 +1	0.319 -0.01	239 +12	9.4 -1.4	96.5 -0.2	close	1000 W vs 1500 W: lower power handling · Xmax 9.4 mm < 10.8 mm: lower excursion-limited SPL	+
RCF LF18N408	30 =	0.33 +0.01	193 -34	15 +4.2	97 +0.3	close		+
Beyma 18SW1600ND	32 +2	0.33 +0.01	205.7 -21.3	10 -0.8	96.6 -0.1	close	Xmax 10 mm < 10.8 mm: lower excursion-limited SPL	+
Sica 18 S 4 CP	33 +3	0.35 +0.03	225 -2	11 +0.2	97.1 +0.4	close		+
RCF LF 18N408	30 =	0.327 =	193 -34	9.8 -1	96.3 -0.4	close	Xmax 9.8 mm < 10.8 mm: lower excursion-limited SPL	+
RCF LF 18X451	30 =	0.278 -0.05	220 -7	10.7 -0.1	96.8 +0.1	close	Xmax 10.7 mm < 10.8 mm: lower excursion-limited SPL	+
Lavoce SAF184.03	30 =	0.32 =	260 +33	13 +2.2	94.9 -1.8	close		+
Fane COLOSSUS 18-1000	32 +2	0.319 -0.01	236 +9	8.9 -1.9	97 +0.3	close	1000 W vs 1500 W: lower power handling · Xmax 8.9 mm < 10.8 mm: lower excursion-limited SPL	+

Compare the closest 3 against the LF 18N405 →

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.