P.Audio 12BM-300B

12" · 8 Ω · 300 W · 96.2 dB

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	48 Hz
Qts	0.31
Qes	0.33
Qms	4.4
Vas	81.27 L
Sd	550 cm²
Xmax	3.3 mm
Re	5.5 Ω
Bl	17.1 T·m
Mms	58.1 g
Pe	300 W
Sensitivity	96.2 dB

Alignment hint

EBP	145 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 19.3 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
Ciare PW328	48 =	0.32 +0.01	91 +9.73	3 -0.3	96.3 +0.1	close	150 W vs 300 W: lower power handling · Xmax 3 mm < 3.3 mm: lower excursion-limited SPL	+
Audax PR33ST150	46 -2	0.327 +0.02	90 +8.73	3.5 +0.2	97.2 +1	close	150 W vs 300 W: lower power handling	+
Jensen BP12/250	50.2 +2.2	0.319 +0.01	73.5 -7.77	3.1 -0.2	97.4 +1.2	close	Xmax 3.1 mm < 3.3 mm: lower excursion-limited SPL	+
SICA BP12/150	50.2 +2.2	0.319 +0.01	73.5 -7.77	3.1 -0.2	97.5 +1.3	close	150 W vs 300 W: lower power handling · Xmax 3.1 mm < 3.3 mm: lower excursion-limited SPL	+
B&C 12 FCX 76	47 -1	0.339 +0.03	82 +0.73	5 +1.7	97.6 +1.4	close		+
Sica 12 L1 2.5 SL	47.5 -0.5	0.36 +0.05	81.8 +0.53	3.7 +0.4	97.3 +1.1	close		+
Beyma 12G350	50 +2	0.293 -0.02	80 -1.27	3.1 -0.2	98.5 +2.3	close	125 W vs 300 W: lower power handling · Xmax 3.1 mm < 3.3 mm: lower excursion-limited SPL	+
Beyma 12"G40	44 -4	0.3 -0.01	81 -0.27	7 +3.7	97 +0.8	close		+
Beyma 12G40	44 -4	0.292 -0.02	81 -0.27	6 +2.7	96.8 +0.6	close		+
SICA 12 E 2 CS	48 =	0.364 +0.05	76.9 -4.37	4 +0.7	95.9 -0.3	close	200 W vs 300 W: lower power handling	+

Compare the closest 3 against the 12BM-300B →

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.