Oberton 18NSW700

18" · 8 Ω · 700 W · 97.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	30.48 Hz
Qts	0.243
Qes	0.25
Qms	9.24
Vas	309.02 L
Sd	1158 cm²
Xmax	14 mm
Re	6.1 Ω
Bl	26.65 T·m
Mms	151.94 g
Pe	700 W
Sensitivity	97.5 dB

Alignment hint

EBP	122 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 41.4 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
Precision Devices PD1850	30 -0.48	0.21 -0.03	249 -60.02	16 +2	98 +0.5	close		+
Oberton 18NSW700-8	30.5 +0.02	0.243 =	309 -0.02	7.7 -6.3	98.6 +1.1	close	Xmax 7.7 mm < 14 mm: lower excursion-limited SPL	+
B&C 18PZB100	30 -0.48	0.24 =	297 -12.02	8 -6	97 -0.5	usable	Xmax 8 mm < 14 mm: lower excursion-limited SPL	+
Radian 2218Neo	30 -0.48	0.23 -0.01	312 +2.98	9 -5	99 +1.5	usable	Xmax 9 mm < 14 mm: lower excursion-limited SPL	+
18 Sound 18NLW9000	32 +1.52	0.21 -0.03	247 -62.02	14 =	97 -0.5	usable	4 Ω vs 8 Ω: amp load changes	+
RCF LF18X401	30 -0.48	0.3 +0.06	274 -35.02	12 -2	97.5 =	usable	Xmax 12 mm < 14 mm: lower excursion-limited SPL	+
RCF LF18Y402	30 -0.48	0.3 +0.06	274 -35.02	12 -2	97.5 =	usable	Xmax 12 mm < 14 mm: lower excursion-limited SPL	+
B&C 18 PZB 100	30 -0.48	0.243 =	297 -12.02	7.8 -6.2	98.8 +1.3	usable	Xmax 7.8 mm < 14 mm: lower excursion-limited SPL	+
RCF LF 18X401	30 -0.48	0.298 +0.05	274 -35.02	11.4 -2.6	97.5 =	usable	Xmax 11.4 mm < 14 mm: lower excursion-limited SPL	+
RCF LF18X451	30 -0.48	0.28 +0.04	220 -89.02	14 =	97 -0.5	usable		+

Compare the closest 3 against the 18NSW700 →

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.