Oberton 12NB400

12" · 8 Ω · 450 W · 98 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	43.58 Hz
Qts	0.18
Qes	0.183
Qms	10.39
Vas	70.45 L
Sd	514.7 cm²
Xmax	5.25 mm
Re	5 Ω
Bl	20.34 T·m
Mms	59.82 g
Pe	450 W
Sensitivity	98 dB

Alignment hint

EBP	238 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 4.9 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
Beyma 12P80/Fe	46 +2.42	0.186 +0.01	75.6 +5.15	5.6 +0.35	99.8 +1.8	close		+
BMS 12S320	45.4 +1.82	0.2 +0.02	69.5 -0.95	4.5 -0.75	98 =	close	Xmax 4.5 mm < 5.25 mm: lower excursion-limited SPL	+
Precision Devices PD122	42.9 -0.68	0.194 +0.01	90 +19.55	5.5 +0.25	98 =	close	16 Ω vs 8 Ω: amp load changes	+
B&C 12 PS 76	42 -1.58	0.208 +0.03	75 +4.55	5.1 -0.15	97.2 -0.8	close	Xmax 5.1 mm < 5.25 mm: lower excursion-limited SPL	+
B&C 12NDL76	50 +6.42	0.19 +0.01	70 -0.45	6 +0.75	100 +2	close	4 Ω vs 8 Ω: amp load changes	+
B&C 12 NW 76	40 -3.58	0.163 -0.02	76 +5.55	4.8 -0.45	98.3 +0.3	close	Xmax 4.8 mm < 5.25 mm: lower excursion-limited SPL	+
PHL Audio 4400Nd	41 -2.58	0.216 +0.04	70 -0.45	5.7 +0.45	96.7 -1.3	close		+
18 Sound 12ND930	50 +6.42	0.21 +0.03	70 -0.45	6.5 +1.25	98 =	close		+
B&C 12NW76	43 -0.58	0.15 -0.03	64.5 -5.95	8 +2.75	98 =	close	4 Ω vs 8 Ω: amp load changes	+
B&C 12NW76	40 -3.58	0.16 -0.02	76 +5.55	8 +2.75	98.5 +0.5	close		+

Compare the closest 3 against the 12NB400 →

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.