Precision Devices PD.12SB30

12" · 8 Ω · 400 W · 95.2 dB

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	47 Hz
Qts	0.31
Qes	0.32
Qms	16.18
Vas	66.82 L
Sd	531 cm²
Xmax	7 mm
Re	5.88 Ω
Bl	19.22 T·m
Mms	68.56 g
Pe	400 W
Sensitivity	95.2 dB

Alignment hint

EBP	147 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 15.9 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
Precision Devices PD.123C01	46 -1	0.32 +0.01	66.82 =	7 =	94.9 -0.3	close		+
Precision Devices PD 123C01	46 -1	0.314 =	66.8 -0.02	5.6 -1.4	96.4 +1.2	close	Xmax 5.6 mm < 7 mm: lower excursion-limited SPL	+
Beyma 12LX60	42 -5	0.3 -0.01	66 -0.82	9 +2	93.8 -1.4	close		+
Eminence IMPERO 12 A	42.8 -4.2	0.322 +0.01	70.2 +3.38	6.2 -0.8	95.8 +0.6	close	Xmax 6.2 mm < 7 mm: lower excursion-limited SPL	+
LaVoce NBASS12-30-16	48 +1	0.34 +0.03	69.83 +3.01	7.3 +0.3	97.5 +2.3	close	16 Ω vs 8 Ω: amp load changes	+
Eminence LA12850	46 -1	0.312 =	66.1 -0.72	5 -2	96.4 +1.2	close	Xmax 5 mm < 7 mm: lower excursion-limited SPL	+
18 Sound 12LW1400	45 -2	0.3 -0.01	55 -11.82	8.25 +1.25	96 +0.8	close		+
DAS Audio 12H	48 +1	0.302 -0.01	57 -9.82	5.9 -1.1	96.1 +0.9	close	Xmax 5.9 mm < 7 mm: lower excursion-limited SPL	+
Faital PRO 12FH520	50 +3	0.27 -0.04	65.5 -1.32	7 =	97 +1.8	close	4 Ω vs 8 Ω: amp load changes	+
18 Sound 12W750	49 +2	0.28 -0.03	73 +6.18	8 +1	97 +1.8	close		+

Compare the closest 3 against the PD.12SB30 →

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.