Audax HD33S66 vp - AP

12" · 8 Ω · 150 W · 92.9 dB

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	26 Hz
Qts	0.286
Qes	0.35
Qms	1.57
Vas	228 L
Sd	530 cm²
Xmax	3.5 mm
Re	7.44 Ω
Bl	15 T·m
Mms	64.7 g
Pe	150 W
Sensitivity	92.9 dB

Alignment hint

EBP	74 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 44.6 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
Fostex W 300 A	25 -1	0.281 =	227 -1	4.6 +1.1	93.4 +0.5	close	50 W vs 150 W: lower power handling	+
Fostex W 300 AII	25 -1	0.281 =	227 -1	4.6 +1.1	93.4 +0.5	close	50 W vs 150 W: lower power handling	+
Audiotechnology FLEXUNITS 12 B 77 25 10	25 -1	0.3 +0.01	250 +22	4.3 +0.8	92.4 -0.5	close		+
Altec 3124	26 =	0.288 =	186.9 -41.1	6.4 +2.9	92.9 =	close		+
Great Plains Audio 3124 GPA	26 =	0.288 =	186.9 -41.1	6.4 +2.9	93.1 +0.2	close		+
MCM Electronics 55-1465 DVC 8 Ohms en série 16 Oh	25 -1	0.29 =	203.8 -24.2	5 +1.5	90.3 -2.6	close	16 Ω vs 8 Ω: amp load changes · 100 W vs 150 W: lower power handling	+
Eton 12-680/A8/62 HEX SYMPHONIE II	26 =	0.296 +0.01	173 -55	6 +2.5	92.8 -0.1	close		+
Audax HT300Z4	25 -1	0.288 =	193 -35	4 +0.5	96.3 +3.4	close	4 Ω vs 8 Ω: amp load changes · 100 W vs 150 W: lower power handling	+
Celestion T1600	22.5 -3.5	0.302 +0.02	245.5 +17.5	4 +0.5	94.4 +1.5	close	80 W vs 150 W: lower power handling	+
Audiotechnology FLEXUNIT 12B772510	25 -1	0.299 +0.01	250 +22	8.6 +5.1	94.3 +1.4	close		+

Compare the closest 3 against the HD33S66 vp - AP →

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.