18 Sound 15NLW9500

15" · 4 Ω · 1000 W · 96 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	34 Hz
Qts	0.29
Qes	0.3
Qms	7.84
Vas	147.5 L
Sd	850 cm²
Xmax	9 mm
Re	2.7 Ω
Bl	18.2 T·m
Mms	172 g
Pe	1000 W
Sensitivity	96 dB

Alignment hint

EBP	113 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 29.8 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 LF 15X401	34 =	0.289 =	146 -1.5	10.3 +1.3	96.4 +0.4	close	8 Ω vs 4 Ω: amp load changes	+
RCF LF15X401	34 =	0.29 =	146 -1.5	12 +3	96.5 +0.5	close	8 Ω vs 4 Ω: amp load changes	+
Beyma 15P1000	35 +1	0.293 =	146 -1.5	8.7 -0.3	96.3 +0.3	close	8 Ω vs 4 Ω: amp load changes · Xmax 8.7 mm < 9 mm: lower excursion-limited SPL	+
BMS 15N840	35.6 +1.6	0.3 +0.01	145.7 -1.8	11 +2	95 -1	close	8 Ω vs 4 Ω: amp load changes	+
BMS 15N840 v2015	35.6 +1.6	0.303 +0.01	145.7 -1.8	9.9 +0.9	97.1 +1.1	close	8 Ω vs 4 Ω: amp load changes	+
Fane COLOSSUS 15XS	36.3 +2.3	0.307 +0.02	149.7 +2.2	9.1 +0.1	97.3 +1.3	close	8 Ω vs 4 Ω: amp load changes	+
Fane COLOSSUS PRIME 15XS	36.3 +2.3	0.307 +0.02	149.7 +2.2	9.1 +0.1	97.3 +1.3	close	8 Ω vs 4 Ω: amp load changes	+
B&C 15 PS 100	33 -1	0.309 +0.02	150.1 +2.6	7.8 -1.2	95.9 -0.1	close	8 Ω vs 4 Ω: amp load changes · 700 W vs 1000 W: lower power handling · Xmax 7.8 mm < 9 mm: lower excursion-limited SPL	+
18 Sound 15NLW9500	35 +1	0.32 +0.03	163 +15.5	9 =	96 =	close	8 Ω vs 4 Ω: amp load changes	+
RCF LF15G401	36 +2	0.26 -0.03	150 +2.5	9 =	97 +1	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the 15NLW9500 →

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.