Atohm D300P04

12" · 4 Ω · 200 W · 93 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	26.5 Hz
Qts	0.33
Qes	0.35
Qms	5.75
Vas	104 L
Sd	472 cm²
Xmax	7 mm
Re	3.5 Ω
Bl	13.4 T·m
Mms	108.3 g
Pe	200 W
Sensitivity	93 dB

Alignment hint

EBP	76 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 29 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
Helix HXS 1206	25 -1.5	0.337 +0.01	107 +3	7 =	93.6 +0.6	close		+
Focal 33V1	25.3 -1.2	0.326 =	91.8 -12.2	7.5 +0.5	93 =	close		+
SICA 12 SR 3 PL vp	28.7 +2.2	0.317 -0.01	101.2 -2.8	7 =	92.4 -0.6	close	8 Ω vs 4 Ω: amp load changes	+
Dali A-12WD vp	27 +0.5	0.328 =	121 +17	8.8 +1.8	93.3 +0.3	close	8 Ω vs 4 Ω: amp load changes	+
Oxygen IN12 300	27 +0.5	0.362 +0.03	114.8 +10.8	8.7 +1.7	93.2 +0.2	close		+
JBL LCS1250W	27.4 +0.9	0.331 =	109 +5	5.3 -1.7	93.5 +0.5	close	120 W vs 200 W: lower power handling · Xmax 5.3 mm < 7 mm: lower excursion-limited SPL	+
Focal 13W 8711	28.8 +2.3	0.328 =	87.1 -16.9	7.9 +0.9	93.4 +0.4	close		+
Focal 13W 8711 vp	28.8 +2.3	0.328 =	87.1 -16.9	7.9 +0.9	93.4 +0.4	close		+
Focal 13 VX	30 +3.5	0.323 -0.01	117 +13	6.8 -0.2	92.5 -0.5	close	8 Ω vs 4 Ω: amp load changes · Xmax 6.8 mm < 7 mm: lower excursion-limited SPL	+
Dayton Audio QU4TRO 12"	27 +0.5	0.357 +0.03	120.1 +16.1	8.7 +1.7	93.6 +0.6	close		+

Compare the closest 3 against the D300P04 →

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.