18 Sound 18NLW9601

18" · 4 Ω · 1800 W · 96 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	4 Ω
Fs	38 Hz
Qts	0.28
Qes	0.29
Qms	6
Vas	111 L
Sd	1295 cm²
Xmax	14 mm
Re	2.7 Ω
Bl	25 T·m
Mms	255 g
Pe	1800 W
Sensitivity	96 dB

Alignment hint

EBP	131 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 20.6 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
18 Sound 18NLW9601	39 +1	0.28 =	120 +9	14 =	96 =	close	8 Ω vs 4 Ω: amp load changes	+
18 Sound 18NLW4500	37 -1	0.31 +0.03	127 +16	14.75 +0.75	96.5 +0.5	close		+
18 Sound 18NLW9601C	38 =	0.34 +0.06	99 -12	14 =	95 -1	close	8 Ω vs 4 Ω: amp load changes	+
B&C 18SW115	34 -4	0.3 +0.02	149.1 +38.1	14 =	96 =	usable		+
B&C 18DS100	34 -4	0.29 +0.01	155 +44	14.5 +0.5	97.5 +1.5	usable	8 Ω vs 4 Ω: amp load changes	+
18 Sound 18NLW4500	35 -3	0.33 +0.05	151 +40	15.3 +1.3	97 +1	usable	8 Ω vs 4 Ω: amp load changes	+
Ascendant Audio 18 DUAL 2 Ohms	29.7 -8.3	0.302 +0.02	114.3 +3.3	12.1 -1.9	99.4 +3.4	usable	2 Ω vs 4 Ω: amp load changes · Xmax 12.1 mm < 14 mm: lower excursion-limited SPL	+
18 Sound 18iD	40 +2	0.26 -0.02	67 -44	15.5 +1.5	95 -1	usable	2 Ω vs 4 Ω: amp load changes	+
18 Sound 18NTLW5000	32 -6	0.3 +0.02	165 +54	17.5 +3.5	95 -1	usable		+
B&C 18RS115	33 -5	0.22 -0.06	125 +14	23.5 +9.5	97.4 +1.4	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the 18NLW9601 →

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.