Helix HXS 1206

12" · 4 Ω · 350 W · 93.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	25 Hz
Qts	0.337
Qes	0.36
Qms	5.35
Vas	107 L
Sd	510 cm²
Xmax	7 mm
Re	2.55 Ω
Bl	12.4 T·m
Mms	138.1 g
Pe	350 W
Sensitivity	93.6 dB

Alignment hint

EBP	69 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 31.4 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
Atohm D300P04	26.5 +1.5	0.33 -0.01	104 -3	7 =	93 -0.6	close	200 W vs 350 W: lower power handling	+
Focal 33V1	25.3 +0.3	0.326 -0.01	91.8 -15.2	7.5 +0.5	93 -0.6	close		+
Dali A-12WD vp	27 +2	0.328 -0.01	121 +14	8.8 +1.8	93.3 -0.3	close	8 Ω vs 4 Ω: amp load changes	+
Oxygen IN12 300	27 +2	0.362 +0.02	114.8 +7.8	8.7 +1.7	93.2 -0.4	close		+
Dayton Audio QU4TRO 12"	27 +2	0.357 +0.02	120.1 +13.1	8.7 +1.7	93.6 =	close	250 W vs 350 W: lower power handling	+
JBL LCS1250W	27.4 +2.4	0.331 -0.01	109 +2	5.3 -1.7	93.5 -0.1	close	120 W vs 350 W: lower power handling · Xmax 5.3 mm < 7 mm: lower excursion-limited SPL	+
SICA 12 SR 3 PL vp	28.7 +3.7	0.317 -0.02	101.2 -5.8	7 =	92.4 -1.2	close	8 Ω vs 4 Ω: amp load changes	+
MAG Audio SUB 300	30.3 +5.3	0.323 -0.01	110.7 +3.7	7.4 +0.4	95.1 +1.5	close		+
Focal 13W 8711	28.8 +3.8	0.328 -0.01	87.1 -19.9	7.9 +0.9	93.4 -0.2	close		+
Focal 13W 8711 vp	28.8 +3.8	0.328 -0.01	87.1 -19.9	7.9 +0.9	93.4 -0.2	close		+

Compare the closest 3 against the HXS 1206 →

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.