Beyma 12BR70 vp n1

12" · 8 Ω · 125 W · 94.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	37.2 Hz
Qts	0.407
Qes	0.45
Qms	4.3
Vas	97.7 L
Sd	540 cm²
Xmax	4.6 mm
Re	4.9 Ω
Bl	14 T·m
Mms	76.6 g
Pe	125 W
Sensitivity	94.6 dB

Alignment hint

EBP	83 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 48.4 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 vp n4	35.1 -2.1	0.388 -0.02	95.7 -2	4.5 -0.1	93.9 -0.7	close	Xmax 4.5 mm < 4.6 mm: lower excursion-limited SPL	+
Ciare M320.5	34.4 -2.8	0.43 +0.02	93.2 -4.5	4.4 -0.2	95.2 +0.6	close	4 Ω vs 8 Ω: amp load changes · Xmax 4.4 mm < 4.6 mm: lower excursion-limited SPL	+
Kartesian WOM300_vDIY	37 -0.2	0.362 -0.04	91.7 -6	6.4 +1.8	94.6 =	close		+
McCauley 6232	35 -2.2	0.411 =	106.2 +8.5	8.4 +3.8	93.6 -1	close		+
MCM Electronics 55-2982	36.2 -1	0.407 =	121.7 +24	7 +2.4	93.9 -0.7	close		+
Beyma SM112/N vp1	37 -0.2	0.433 +0.03	90 -7.7	7.3 +2.7	92.7 -1.9	close		+
Davis 31TPA vp nº1 dats v2	41.7 +4.5	0.4 -0.01	114.9 +17.2	4.8 +0.2	95.5 +0.9	close		+
RCF W 300	39.5 +2.3	0.391 -0.02	90 -7.7	6.9 +2.3	96.4 +1.8	close	4 Ω vs 8 Ω: amp load changes	+
Beyma SM212 vp Nº2	41.7 +4.5	0.41 =	110.7 +13	7.3 +2.7	95.2 +0.6	close		+
Ciare HSB322-22	35 -2.2	0.42 +0.01	83 -14.7	7.5 +2.9	95 +0.4	close	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 12BR70 vp n1 →

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.