Dayton Audio SD315A-88

12" · 4 Ω · 120 W · 93.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	24.2 Hz
Qts	0.335
Qes	0.37
Qms	3.54
Vas	151.7 L
Sd	522.8 cm²
Xmax	6.4 mm
Re	3.1 Ω
Bl	11.8 T·m
Mms	109.2 g
Pe	120 W
Sensitivity	93.7 dB

Alignment hint

EBP	65 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 43.9 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.STX.12.2.500.4.F.S.MC	25 +0.8	0.31 -0.03	151 -0.7	7.5 +1.1	94.3 +0.6	close		+
Dayton Audio ST305-8 Séries II	26.2 +2	0.334 =	164 +12.3	8 +1.6	92.3 -1.4	close	8 Ω vs 4 Ω: amp load changes	+
Eton 12-680-62 HEX	26 +1.8	0.343 +0.01	150 -1.7	6 -0.4	91.6 -2.1	close	8 Ω vs 4 Ω: amp load changes · Xmax 6 mm < 6.4 mm: lower excursion-limited SPL	+
Dayton Audio 12 DVC	25 +0.8	0.347 +0.01	147.3 -4.4	15.5 +9.1	94 +0.3	close		+
STX W.32.500.8.MC	25 +0.8	0.299 -0.04	155 +3.3	7.5 +1.1	92.1 -1.6	close	8 Ω vs 4 Ω: amp load changes	+
Dayton Audio DSA315-8	24.2 =	0.33 -0.01	147 -4.7	5.5 -0.9	90.4 -3.3	close	8 Ω vs 4 Ω: amp load changes · Xmax 5.5 mm < 6.4 mm: lower excursion-limited SPL	+
Pioneer TS-W303C	24 -0.2	0.342 +0.01	186.2 +34.5	6 -0.4	94.9 +1.2	close	Xmax 6 mm < 6.4 mm: lower excursion-limited SPL	+
Peerless XXLS12-8+8	21.8 -2.4	0.357 +0.02	144.2 -7.5	9.7 +3.3	93.1 -0.6	close		+
JBL CS12	24.7 +0.5	0.388 +0.05	144 -7.7	6 -0.4	92.7 -1	close	Xmax 6 mm < 6.4 mm: lower excursion-limited SPL	+
Peerless 308SWR51XXLSP (830847)	21.8 -2.4	0.357 +0.02	144.2 -7.5	10.8 +4.4	93.1 -0.6	close		+

Compare the closest 3 against the SD315A-88 →

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.