STX W.STX.12.2.500.4.F.S.MC

12" · 4 Ω · 250 W · 94.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	25 Hz
Qts	0.31
Qes	0.36
Qms	2.21
Vas	151 L
Sd	491 cm²
Xmax	7.5 mm
Re	3.1 Ω
Bl	11.1 T·m
Mms	90.7 g
Pe	250 W
Sensitivity	94.3 dB

Alignment hint

EBP	69 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 35.9 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
STX W.32.500.8.MC	25 =	0.299 -0.01	155 +4	7.5 =	92.1 -2.2	close	8 Ω vs 4 Ω: amp load changes	+
Dayton Audio SD315A-88	24.2 -0.8	0.335 +0.03	151.7 +0.7	6.4 -1.1	93.7 -0.6	close	120 W vs 250 W: lower power handling · Xmax 6.4 mm < 7.5 mm: lower excursion-limited SPL	+
Visaton TIW300	25 =	0.282 -0.03	160 +9	9.7 +2.2	92.9 -1.4	close	8 Ω vs 4 Ω: amp load changes	+
Dayton Audio 12 DVC	25 =	0.347 +0.04	147.3 -3.7	15.5 +8	94 -0.3	close		+
Dayton Audio ST305-8 Séries II	26.2 +1.2	0.334 +0.02	164 +13	8 +0.5	92.3 -2	close	8 Ω vs 4 Ω: amp load changes	+
Scan-Speak 32W/4878T01	23 -2	0.286 -0.02	170 +19	7 -0.5	94.5 +0.2	close	150 W vs 250 W: lower power handling · Xmax 7 mm < 7.5 mm: lower excursion-limited SPL	+
Eton 12-212/C8/62 HEX SYMPHONY II	24 -1	0.31 =	176 +25	8.5 +1	90.7 -3.6	close	8 Ω vs 4 Ω: amp load changes	+
Magnat SUPREME 3000	29 +4	0.31 =	131 -20	8 +0.5	96.4 +2.1	close		+
Dali A-12WD vp	27 +2	0.328 +0.02	121 -30	8.8 +1.3	93.3 -1	close	8 Ω vs 4 Ω: amp load changes	+
Visaton WS33NG	30 +5	0.308 =	190 +39	8 +0.5	94.5 +0.2	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the W.STX.12.2.500.4.F.S.MC →

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.