18 Sound 18NLW9400

18" · 8 Ω · 1200 W · 98 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	33 Hz
Qts	0.26
Qes	0.28
Qms	6.1
Vas	268 L
Sd	1225 cm²
Xmax	9.5 mm
Re	5 Ω
Bl	26 T·m
Mms	180 g
Pe	1200 W
Sensitivity	98 dB

Alignment hint

EBP	118 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 41.9 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 LF18N401	32 -1	0.26 =	257 -11	9 -0.5	98 =	close	Xmax 9 mm < 9.5 mm: lower excursion-limited SPL	+
18 Sound 18LW1251	35 +2	0.27 +0.01	268 =	9 -0.5	98 =	close	Xmax 9 mm < 9.5 mm: lower excursion-limited SPL	+
B&C 18NW100	31 -2	0.26 =	252 -16	9 -0.5	98 =	close	Xmax 9 mm < 9.5 mm: lower excursion-limited SPL	+
RCF LF 18N401	32 -1	0.259 =	257 -11	8.8 -0.7	98.9 +0.9	close	Xmax 8.8 mm < 9.5 mm: lower excursion-limited SPL	+
RCF LF18G401	33 =	0.29 +0.03	268 =	9 -0.5	98 =	close	900 W vs 1200 W: lower power handling · Xmax 9 mm < 9.5 mm: lower excursion-limited SPL	+
RCF LF18G908	33 =	0.29 +0.03	268 =	9 -0.5	98 =	close	900 W vs 1200 W: lower power handling · Xmax 9 mm < 9.5 mm: lower excursion-limited SPL	+
B&C 18 TBX 46	31 -2	0.277 +0.02	270 +2	9 -0.5	98.2 +0.2	close	Xmax 9 mm < 9.5 mm: lower excursion-limited SPL	+
Beyma 18PW1400FE /S	32 -1	0.27 +0.01	228.9 -39.1	10 +0.5	98 =	close		+
B&C 18 NW 100	31 -2	0.254 -0.01	252 -16	8.7 -0.8	98.4 +0.4	close	Xmax 8.7 mm < 9.5 mm: lower excursion-limited SPL	+
Beyma 18PW1400/FE	32 -1	0.273 +0.01	228.9 -39.1	9.1 -0.4	98.3 +0.3	close	Xmax 9.1 mm < 9.5 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 18NLW9400 →

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.