Beyma 12"BR70

12" · 8 Ω · 125 W · 93 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	31 Hz
Qts	0.5
Qes	0.56
Qms	4.44
Vas	142 L
Sd	540 cm²
Xmax	8 mm
Re	5.6 Ω
Bl	12.1 T·m
Pe	125 W
Sensitivity	93 dB

Alignment hint

EBP	55 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 142 L

EBP 50-100: works in either a sealed or ported 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 12BR70 v2014	31 =	0.497 =	142 =	6 -2	92.3 -0.7	close	Xmax 6 mm < 8 mm: lower excursion-limited SPL	+
Beyma 12BR70 v2015	31 =	0.497 =	142 =	6 -2	92.3 -0.7	close	Xmax 6 mm < 8 mm: lower excursion-limited SPL	+
Celestion PULSE XL 12.20	35.1 +4.1	0.503 =	153.3 +11.3	8.3 +0.3	94.2 +1.2	close		+
Faital PRO 12FE330	33 +2	0.45 -0.05	146.7 +4.7	8.32 +0.32	94 +1	close		+
Infinity 120W.IB	32 +1	0.527 +0.03	127 -15	8.1 +0.1	94.9 +1.9	close	4 Ω vs 8 Ω: amp load changes	+
JBL P1200	30 -1	0.45 -0.05	123 -19	7.8 -0.2	92.8 -0.2	close	Xmax 7.8 mm < 8 mm: lower excursion-limited SPL	+
MTX Audio T4124A	29.3 -1.7	0.549 +0.05	118.8 -23.2	8.4 +0.4	92.9 -0.1	close	4 Ω vs 8 Ω: amp load changes	+
Peerless SLS12 830669 v2012	31 =	0.536 +0.04	132.4 -9.6	6.1 -1.9	91.9 -1.1	close	Xmax 6.1 mm < 8 mm: lower excursion-limited SPL	+
Infinity KAPPA CS 120 LB	29 -2	0.485 -0.02	161.4 +19.4	6.7 -1.3	94.3 +1.3	close	4 Ω vs 8 Ω: amp load changes · Xmax 6.7 mm < 8 mm: lower excursion-limited SPL	+
Focal 33V	25.2 -5.8	0.479 -0.02	128.8 -13.2	7.5 -0.5	93 =	close	4 Ω vs 8 Ω: amp load changes · Xmax 7.5 mm < 8 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 12"BR70 →

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.