Dayton Audio ST305-8

12" · 8 Ω · 275 W · 92.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	29.6 Hz
Qts	0.348
Qes	0.36
Qms	10.55
Vas	128.1 L
Sd	506.7 cm²
Xmax	8 mm
Re	6 Ω
Bl	15.9 T·m
Mms	81.2 g
Pe	275 W
Sensitivity	92.9 dB

Alignment hint

EBP	82 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 40.9 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
Faital PRO 12RS430	30 +0.4	0.35 =	131.2 +3.1	13.57 +5.57	93 +0.1	close		+
Visaton TIW300 vp	28.9 -0.7	0.32 -0.03	125 -3.1	8.3 +0.3	92.5 -0.4	close		+
Eton 12-612/C8/62 RP	30 +0.4	0.32 -0.03	134 +5.9	8.5 +0.5	92.1 -0.8	close	150 W vs 275 W: lower power handling	+
Dayton Audio QU4TRO 12"	27 -2.6	0.357 +0.01	120.1 -8	8.7 +0.7	93.6 +0.7	close	4 Ω vs 8 Ω: amp load changes	+
Dali A-12WD vp	27 -2.6	0.328 -0.02	121 -7.1	8.8 +0.8	93.3 +0.4	close		+
Oxygen IN12 300	27 -2.6	0.362 +0.01	114.8 -13.3	8.7 +0.7	93.2 +0.3	close	4 Ω vs 8 Ω: amp load changes	+
Focal 13 VX	30 +0.4	0.323 -0.02	117 -11.1	6.8 -1.2	92.5 -0.4	close	Xmax 6.8 mm < 8 mm: lower excursion-limited SPL	+
Focal AUDIOM 13KX	28.8 -0.8	0.328 -0.02	127 -1.1	6 -2	92.3 -0.6	close	Xmax 6 mm < 8 mm: lower excursion-limited SPL	+
Magnat SUPREME 3000	29 -0.6	0.31 -0.04	131 +2.9	8 =	96.4 +3.5	close	4 Ω vs 8 Ω: amp load changes	+
Focal 13V 7511	31.2 +1.6	0.353 +0.01	154.2 +26.1	6.8 -1.2	93.6 +0.7	close	175 W vs 275 W: lower power handling · Xmax 6.8 mm < 8 mm: lower excursion-limited SPL	+

Compare the closest 3 against the ST305-8 →

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.