Beyma 12WR400

12" · 8 Ω · 400 W · 96.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	42 Hz
Qts	0.285
Qes	0.3
Qms	5.6
Vas	91.1 L
Sd	530 cm²
Xmax	6.3 mm
Re	5.8 Ω
Bl	17.8 T·m
Mms	62.1 g
Pe	400 W
Sensitivity	96.9 dB

Alignment hint

EBP	140 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 17.7 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
Beyma 12WRS400	42 =	0.29 +0.01	91 -0.1	6.3 =	97 +0.1	close		+
Beyma 12"WR400	42 =	0.27 -0.01	91 -0.1	6.3 =	97 +0.1	close		+
Beyma 12LW30/N v2015	42 =	0.269 -0.02	84 -7.1	6.1 -0.2	96.3 -0.6	close	Xmax 6.1 mm < 6.3 mm: lower excursion-limited SPL	+
Beyma 12G40	44 +2	0.292 +0.01	81 -10.1	6 -0.3	96.8 -0.1	close	Xmax 6 mm < 6.3 mm: lower excursion-limited SPL	+
Focal W31X4	42 =	0.292 +0.01	91 -0.1	5.5 -0.8	99.2 +2.3	close	4 Ω vs 8 Ω: amp load changes · 300 W vs 400 W: lower power handling · Xmax 5.5 mm < 6.3 mm: lower excursion-limited SPL	+
Beyma 12"G40	44 +2	0.3 +0.02	81 -10.1	7 +0.7	97 +0.1	close		+
Beyma 12MW/ND	43 +1	0.328 +0.04	100 +8.9	6.5 +0.2	96.9 =	close		+
PHL Audio 4510	42 =	0.307 +0.02	108 +16.9	6 -0.3	97.3 +0.4	close	300 W vs 400 W: lower power handling · Xmax 6 mm < 6.3 mm: lower excursion-limited SPL	+
Dayton Audio PA310-8	39 -3	0.292 +0.01	91.8 +0.7	5 -1.3	96.2 -0.7	close	Xmax 5 mm < 6.3 mm: lower excursion-limited SPL	+
McCauley B1240	38 -4	0.286 =	110 +18.9	6.5 +0.2	96.3 -0.6	close		+

Compare the closest 3 against the 12WR400 →

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.