B&C 12NBX100

12" · 8 Ω · 1000 W · 96 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	41 Hz
Qts	0.22
Qes	0.24
Qms	3.9
Vas	51 L
Sd	531 cm²
Xmax	10 mm
Re	5.1 Ω
Bl	25.6 T·m
Mms	117 g
Pe	1000 W
Sensitivity	96 dB

Alignment hint

EBP	171 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 5.5 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
B&C 12NBX100	40 -1	0.22 =	46.5 -4.5	10 =	94 -2	close	4 Ω vs 8 Ω: amp load changes	+
Lavoce WAF124.01	42 +1	0.22 =	49 -2	9 -1	93.8 -2.2	close	Xmax 9 mm < 10 mm: lower excursion-limited SPL	+
Lavoce WAN124.01	40 -1	0.21 -0.01	51 =	8.5 -1.5	93.6 -2.4	close	Xmax 8.5 mm < 10 mm: lower excursion-limited SPL	+
B&C 12 NBX 100	41 =	0.226 +0.01	51 =	6.6 -3.4	95.6 -0.4	close	Xmax 6.6 mm < 10 mm: lower excursion-limited SPL	+
B&C 12NW100	42 +1	0.2 -0.02	44 -7	9 -1	96 =	close	Xmax 9 mm < 10 mm: lower excursion-limited SPL	+
18 Sound 12NLW9410	42 +1	0.26 +0.04	55 +4	11 +1	95 -1	close		+
Beyma 12"LEX1300Nd	45 +4	0.24 +0.02	43 -8	11 +1	96 =	close		+
Faital PRO 12FX600	48 +7	0.24 +0.02	44.4 -6.6	9.9 -0.1	97 +1	usable	700 W vs 1000 W: lower power handling · Xmax 9.9 mm < 10 mm: lower excursion-limited SPL	+
Sica 12 PFS 4	39 -2	0.26 +0.04	55.6 +4.6	9 -1	94.8 -1.2	usable	Xmax 9 mm < 10 mm: lower excursion-limited SPL	+
RCF LF12X401	45 +4	0.27 +0.05	50 -1	9 -1	96.5 +0.5	usable	Xmax 9 mm < 10 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 12NBX100 →

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 (1)

Dual 12" Bass Reflexsubbass reflex