Powerbass S-12T

12" · 4 Ω · 300 W · 85.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	34.4 Hz
Qts	0.634
Qes	0.758
Qms	3.9
Vas	45.92 L
Sd	531 cm²
Xmax	6.9 mm
Re	3.2 Ω
Bl	13 T·m
Mms	186.3 g
Pe	300 W
Sensitivity	85.8 dB

Alignment hint

EBP	45 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 188.3 L

EBP < 50: favours a sealed (closed) 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
Hertz Audio ES 300.5	35 +0.6	0.66 +0.03	48.5 +2.58	9 +2.1	86.6 +0.8	close		+
American Bass DX 12	35.6 +1.2	0.6 -0.03	41.5 -4.42	12 +5.1	86.2 +0.4	close		+
Ground Zero GZIW 300X	34.9 +0.5	0.69 +0.06	53.6 +7.68	7.5 +0.6	86.6 +0.8	close		+
Sony XS-L124P5B	33.1 -1.3	0.626 -0.01	44.5 -1.42	6 -0.9	88.8 +3	close	Xmax 6 mm < 6.9 mm: lower excursion-limited SPL	+
hertz Hertz Audio ES300.5	35 +0.6	0.66 +0.03	48.5 +2.58	6.8 -0.1	90.8 +5	close	Xmax 6.8 mm < 6.9 mm: lower excursion-limited SPL	+
Ground Zero GZIW 12XSPL-D2	32.5 -1.9	0.736 +0.1	40.4 -5.52	7.6 +0.7	87.1 +1.3	close	8 Ω vs 4 Ω: amp load changes	+
Cerwin-Vega VEGA 124	30.3 -4.1	0.612 -0.02	60.3 +14.38	7 +0.1	86.4 +0.6	usable	8 Ω vs 4 Ω: amp load changes	+
Rockford Fosgate T1D412	29.2 -5.2	0.613 -0.02	55.8 +9.88	10.9 +4	85.8 =	usable	8 Ω vs 4 Ω: amp load changes	+
Selenium 12SW3A DVC 2+2	35 +0.6	0.724 +0.09	49 +3.08	6.5 -0.4	89.6 +3.8	usable	Xmax 6.5 mm < 6.9 mm: lower excursion-limited SPL	+
Pioneer TS-W308D4	34.5 +0.1	0.625 -0.01	34.7 -11.22	6.4 -0.5	89.4 +3.6	usable	Xmax 6.4 mm < 6.9 mm: lower excursion-limited SPL	+

Compare the closest 3 against the S-12T →

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.