Audax HT300Z2

12" · 4 Ω · 120 W · 97.5 dB

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	31.5 Hz
Qts	0.337
Qes	0.35
Qms	9.1
Vas	162.5 L
Sd	539 cm²
Xmax	5.9 mm
Re	3.23 Ω
Bl	10.8 T·m
Mms	64.1 g
Pe	120 W
Sensitivity	97.5 dB

Alignment hint

EBP	90 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 47.8 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
AE Speakers TD12S	31.5 =	0.336 =	159.4 -3.1	7 +1.1	94.9 -2.6	close	8 Ω vs 4 Ω: amp load changes	+
Cabasse 30M22	31.5 =	0.315 -0.02	196.1 +33.6	8 +2.1	97.7 +0.2	close	8 Ω vs 4 Ω: amp load changes	+
Focal 13V 7511	31.2 -0.3	0.353 +0.02	154.2 -8.3	6.8 +0.9	93.6 -3.9	close	8 Ω vs 4 Ω: amp load changes	+
Visaton TD	31 -0.5	0.324 -0.01	200 +37.5	7.3 +1.4	95.5 -2	close	8 Ω vs 4 Ω: amp load changes	+
Davis 31TCA12	34 +2.5	0.296 -0.04	149 -13.5	6 +0.1	95.9 -1.6	close	8 Ω vs 4 Ω: amp load changes	+
Visaton TD1	30.3 -1.2	0.327 -0.01	200 +37.5	7.6 +1.7	95.3 -2.2	close	8 Ω vs 4 Ω: amp load changes	+
Rockford Fosgate S1-124	28 -3.5	0.326 -0.01	186 +23.5	9.9 +4	96.2 -1.3	close		+
AE Speakers TD12X	33.9 +2.4	0.284 -0.05	159.4 -3.1	7 +1.1	95.4 -2.1	usable	8 Ω vs 4 Ω: amp load changes	+
Davis 31TCA12 vp rc	32.5 +1	0.314 -0.02	222 +59.5	6 +0.1	96.2 -1.3	usable	8 Ω vs 4 Ω: amp load changes	+
Davis 31TCA12 v2012	38 +6.5	0.333 =	216 +53.5	6 +0.1	97.9 +0.4	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the HT300Z2 →

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.