Beyma 12BR70

12" · 8 Ω · 125 W · 94.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	35 Hz
Qts	0.355
Qes	0.44
Qms	1.85
Vas	135 L
Sd	540 cm²
Xmax	4.8 mm
Re	5.6 Ω
Bl	13.2 T·m
Mms	62.6 g
Pe	125 W
Sensitivity	94.7 dB

Alignment hint

EBP	80 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 45.5 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
Ardan W PRO-31	36.8 +1.8	0.373 +0.02	133.9 -1.1	6 +1.2	94.6 -0.1	close		+
Supravox 285 GMF vp5	35 =	0.372 +0.02	150 +15	4 -0.8	95.4 +0.7	close	70 W vs 125 W: lower power handling · Xmax 4 mm < 4.8 mm: lower excursion-limited SPL	+
Supravox 285 GMF vp6	35 =	0.372 +0.02	150 +15	4 -0.8	95.4 +0.7	close	70 W vs 125 W: lower power handling · Xmax 4 mm < 4.8 mm: lower excursion-limited SPL	+
Audax PR300T4 vp série	36 +1	0.349 -0.01	114 -21	4 -0.8	94.7 =	close	Xmax 4 mm < 4.8 mm: lower excursion-limited SPL	+
Eminence DELTALITE II 2512 v2	37 +2	0.386 +0.03	147 +12	4.9 +0.1	96.3 +1.6	close		+
Audio Dynamique 320/75	32 -3	0.341 -0.01	116 -19	5 +0.2	93.8 -0.9	close		+
Focal 13V 7511	31.2 -3.8	0.353 =	154.2 +19.2	6.8 +2	93.6 -1.1	close		+
Infinity 1211W	35.1 +0.1	0.397 +0.04	123.3 -11.7	4.5 -0.3	97 +2.3	close	4 Ω vs 8 Ω: amp load changes · Xmax 4.5 mm < 4.8 mm: lower excursion-limited SPL	+
AE Speakers TD12S	31.5 -3.5	0.336 -0.02	159.4 +24.4	7 +2.2	94.9 +0.2	close		+
MCM Electronics 55-2982	36.2 +1.2	0.407 +0.05	121.7 -13.3	7 +2.2	93.9 -0.8	close		+

Compare the closest 3 against the 12BR70 →

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.