RCF MB 12X301

12" · 8 Ω · 500 W · 98.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	50 Hz
Qts	0.29
Qes	0.3
Qms	9
Vas	70 L
Sd	530 cm²
Xmax	5.9 mm
Re	5.4 Ω
Bl	18 T·m
Mms	57 g
Pe	500 W
Sensitivity	98.3 dB

Alignment hint

EBP	167 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 14.2 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
Faital PRO 12FH520	50 =	0.29 =	73.7 +3.7	7.25 +1.35	98 -0.3	close		+
LaVoce WAF123.03	50 =	0.287 =	70 =	5.5 -0.4	99 +0.7	close	Xmax 5.5 mm < 5.9 mm: lower excursion-limited SPL	+
B&C 12NDL76	50 =	0.27 -0.02	69 -1	7 +1.1	100 +1.7	close	16 Ω vs 8 Ω: amp load changes	+
18 Sound 12W750	49 -1	0.28 -0.01	73 +3	8 +2.1	97 -1.3	close		+
18 Sound 12ND830	55 +5	0.28 -0.01	72 +2	6.5 +0.6	99 +0.7	close		+
LaVoce WSN122.50-4	49 -1	0.29 =	64.43 -5.57	5.3 -0.6	97 -1.3	close	4 Ω vs 8 Ω: amp load changes · 250 W vs 500 W: lower power handling · Xmax 5.3 mm < 5.9 mm: lower excursion-limited SPL	+
Faital PRO 12FH520	50 =	0.27 -0.02	65.5 -4.5	7 +1.1	97 -1.3	close	4 Ω vs 8 Ω: amp load changes	+
B&C 12FL76	50 =	0.3 +0.01	57 -13	6 +0.1	97.5 -0.8	close		+
JBL 2206H	52 +2	0.316 +0.03	62.3 -7.7	5.9 =	97.9 -0.4	close		+
Master Audio HPLSN12-500	52 +2	0.283 -0.01	65 -5	5 -0.9	97.7 -0.6	close	Xmax 5 mm < 5.9 mm: lower excursion-limited SPL	+

Compare the closest 3 against the MB 12X301 →

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.