RCF MB 12N351

12" · 8 Ω · 650 W · 100.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	55 Hz
Qts	0.201
Qes	0.21
Qms	4.5
Vas	61 L
Sd	530 cm²
Xmax	4.7 mm
Re	5.6 Ω
Bl	22.3 T·m
Mms	54.1 g
Pe	650 W
Sensitivity	100.4 dB

Alignment hint

EBP	262 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 5.4 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
B&C 12MH32	53 -2	0.19 -0.01	63 +2	5 +0.3	101 +0.6	close	400 W vs 650 W: lower power handling	+
Precision Devices PD121	59 +4	0.201 =	54 -7	5 +0.3	100 -0.4	close	16 Ω vs 8 Ω: amp load changes · 300 W vs 650 W: lower power handling	+
Beyma 12P80FE V2	50 -5	0.201 =	66.8 +5.8	5.2 +0.5	99.9 -0.5	close		+
RCF MB 12N405	52 -3	0.203 =	53 -8	5.7 +1	99.5 -0.9	close		+
18 Sound 12ND940	49 -6	0.2 =	64.8 +3.8	7.6 +2.9	100 -0.4	close		+
Beyma 12MI100	58 +3	0.221 +0.02	64 +3	4.2 -0.5	100.4 =	close	450 W vs 650 W: lower power handling · Xmax 4.2 mm < 4.7 mm: lower excursion-limited SPL	+
B&C 12 NDL 76	50 -5	0.2 =	73 +12	4.3 -0.4	100.1 -0.3	close	400 W vs 650 W: lower power handling · Xmax 4.3 mm < 4.7 mm: lower excursion-limited SPL	+
B&C 12 MH 32	52 -3	0.194 -0.01	71 +10	4.1 -0.6	100.7 +0.3	close	400 W vs 650 W: lower power handling · Xmax 4.1 mm < 4.7 mm: lower excursion-limited SPL	+
B&C 12NDL76	50 -5	0.2 =	73 +12	7 +2.3	100 -0.4	close	400 W vs 650 W: lower power handling	+
Beyma 12"P80/Fe V2	48 -7	0.21 +0.01	61 =	7.5 +2.8	99 -1.4	close		+

Compare the closest 3 against the MB 12N351 →

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.