18 Sound 6ND430

6.5" · 4 Ω · 200 W · 92.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	6.5"
Impedance	4 Ω
Fs	64 Hz
Qts	0.24
Qes	0.25
Qms	6.5
Vas	12.2 L
Sd	133 cm²
Xmax	5 mm
Re	2.9 Ω
Bl	7.8 T·m
Mms	13.9 g
Pe	200 W
Sensitivity	92.5 dB

Alignment hint

EBP	256 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 1.6 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 6ND430	61 -3	0.27 +0.03	12.6 +0.4	5 =	92.5 =	close	8 Ω vs 4 Ω: amp load changes	+
Beyma 6P200Fe	58 -6	0.26 +0.02	11.1 -1.1	5 =	93 +0.5	close	8 Ω vs 4 Ω: amp load changes	+
18 Sound 6ND430	66 +2	0.3 +0.06	12.6 +0.4	5 =	94 +1.5	close	16 Ω vs 4 Ω: amp load changes	+
Beyma 6"P200/ND	56 -8	0.29 +0.05	11.9 -0.3	5.5 +0.5	92 -0.5	usable	8 Ω vs 4 Ω: amp load changes	+
Oberton 6NB150	62.32 -1.68	0.28 +0.04	9.3 -2.9	5.5 +0.5	92 -0.5	usable	8 Ω vs 4 Ω: amp load changes · 150 W vs 200 W: lower power handling	+
Oberton 6B150	55.04 -8.96	0.292 +0.05	14.61 +2.41	5.5 +0.5	92 -0.5	usable	8 Ω vs 4 Ω: amp load changes · 150 W vs 200 W: lower power handling	+
B&C 6PS38	75 +11	0.3 +0.06	8 -4.2	6 +1	94 +1.5	usable	8 Ω vs 4 Ω: amp load changes · 150 W vs 200 W: lower power handling	+
Beyma 6P200Fe	66 +2	0.35 +0.11	8.8 -3.4	4 -1	93 +0.5	usable	16 Ω vs 4 Ω: amp load changes · Xmax 4 mm < 5 mm: lower excursion-limited SPL	+
B&C 6PS44	71 +7	0.33 +0.09	7 -5.2	4.5 -0.5	93 +0.5	usable	8 Ω vs 4 Ω: amp load changes · Xmax 4.5 mm < 5 mm: lower excursion-limited SPL	+
B&C 6NDL38	69 +5	0.39 +0.15	7.1 -5.1	6 +1	91 -1.5	risky	150 W vs 200 W: lower power handling	+

Compare the closest 3 against the 6ND430 →

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.