18 Sound 15ND940

15" · 8 Ω · 600 W · 99 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	38 Hz
Qts	0.28
Qes	0.29
Qms	7.5
Vas	174 L
Sd	881.4 cm²
Xmax	9.5 mm
Re	5.4 Ω
Bl	21.9 T·m
Mms	108 g
Pe	600 W
Sensitivity	99 dB

Alignment hint

EBP	131 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 32.4 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
18 Sound 15ND940	39 +1	0.26 -0.02	170 -4	9.5 =	99 =	close	4 Ω vs 8 Ω: amp load changes	+
Faital PRO 15FX560	38 =	0.3 +0.02	159 -15	9.42 -0.08	99 =	close	Xmax 9.42 mm < 9.5 mm: lower excursion-limited SPL	+
Fane COLOSSUS 15XBN	38 =	0.279 =	168 -6	7.5 -2	98.1 -0.9	close	Xmax 7.5 mm < 9.5 mm: lower excursion-limited SPL	+
Elokance 15WF2400	38 =	0.32 +0.04	165.2 -8.8	10.5 +1	98.1 -0.9	close		+
B&C 15NDL88	41 +3	0.28 =	154 -20	8 -1.5	99 =	close	4 Ω vs 8 Ω: amp load changes · Xmax 8 mm < 9.5 mm: lower excursion-limited SPL	+
B&C 15PS76-8	38 =	0.26 -0.02	164 -10	7.5 -2	99 =	close	Xmax 7.5 mm < 9.5 mm: lower excursion-limited SPL	+
18 Sound 15NLW9300 v2015	39 +1	0.263 -0.02	170 -4	7.2 -2.3	98.9 -0.1	close	Xmax 7.2 mm < 9.5 mm: lower excursion-limited SPL	+
BMS 15N830V2 v2015	37 -1	0.271 -0.01	159 -15	7.5 -2	98.6 -0.4	close	Xmax 7.5 mm < 9.5 mm: lower excursion-limited SPL	+
Faital PRO 15FH510	35 -3	0.26 -0.02	191.8 +17.8	9.25 -0.25	98 -1	close	Xmax 9.25 mm < 9.5 mm: lower excursion-limited SPL	+
JBL 2255H	39 +1	0.303 +0.02	170 -4	7.1 -2.4	98.9 -0.1	close	Xmax 7.1 mm < 9.5 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 15ND940 →

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.