18 Sound 15NTLW2500

15" · 8 Ω · 600 W · 100.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	45 Hz
Qts	0.3
Qes	0.31
Qms	8.9
Vas	143 L
Sd	881.4 cm²
Xmax	8 mm
Re	5.1 Ω
Bl	21.2 T·m
Mms	95 g
Pe	600 W
Sensitivity	100.5 dB

Alignment hint

EBP	145 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 31.4 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
Oberton 15NMB500	44.74 -0.26	0.292 -0.01	127.95 -15.05	7.75 -0.25	100.5 =	close	Xmax 7.75 mm < 8 mm: lower excursion-limited SPL	+
Oberton 15B450 / 15B450A / 15B450A2	45.08 +0.08	0.286 -0.01	146.85 +3.85	6.75 -1.25	100 -0.5	close	450 W vs 600 W: lower power handling · Xmax 6.75 mm < 8 mm: lower excursion-limited SPL	+
Oberton 15NXL701	43.4 -1.6	0.3 =	127.09 -15.91	9.25 +1.25	99 -1.5	close		+
Sica 15 PF 3	45 =	0.31 +0.01	117.6 -25.4	8 =	99.1 -1.4	close		+
B&C 15NDL88	41 -4	0.28 -0.02	154 +11	8 =	99 -1.5	close	4 Ω vs 8 Ω: amp load changes	+
B&C 15NDL88	45 =	0.34 +0.04	126 -17	8 =	99 -1.5	close		+
18 Sound 15ND730	44 -1	0.29 -0.01	156 +13	6.5 -1.5	99 -1.5	close	400 W vs 600 W: lower power handling · Xmax 6.5 mm < 8 mm: lower excursion-limited SPL	+
18 Sound 15CX1000	48 +3	0.304 =	132.5 -10.5	6 -2	100.2 -0.3	close	Xmax 6 mm < 8 mm: lower excursion-limited SPL	+
Oberton 15B450	45.1 +0.1	0.285 -0.02	146.9 +3.9	5.4 -2.6	100.3 -0.2	close	450 W vs 600 W: lower power handling · Xmax 5.4 mm < 8 mm: lower excursion-limited SPL	+
Faital PRO 15FX560 v2015	38 -7	0.296 =	143 =	7.5 -0.5	97.9 -2.6	close	Xmax 7.5 mm < 8 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 15NTLW2500 →

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.