Audax HD33S66 vp AUDIOREF - AP

12" · 8 Ω · 150 W · 93.8 dB

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	24 Hz
Qts	0.272
Qes	0.311
Qms	2.15
Vas	321 L
Sd	530 cm²
Xmax	3.5 mm
Re	7.59 Ω
Bl	14.1 T·m
Mms	53.9 g
Pe	150 W
Sensitivity	93.8 dB

Alignment hint

EBP	77 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 55.7 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
Monacor SPP-300/AD	23 -1	0.265 -0.01	305 -16	5 +1.5	93.9 +0.1	close	100 W vs 150 W: lower power handling	+
Siare 31TE	23 -1	0.265 -0.01	322 +1	5 +1.5	95.1 +1.3	close		+
Philips AD12200/W8	24 =	0.303 +0.03	287.4 -33.6	5 +1.5	93.6 -0.2	close	80 W vs 150 W: lower power handling	+
Monacor SPH-300TC vp 1 seule bobine	23 -1	0.239 -0.03	290 -31	4 +0.5	94.3 +0.5	close		+
Tonsil GDN 30/80/2	25 +1	0.26 -0.01	270 -51	6 +2.5	93.5 -0.3	close	80 W vs 150 W: lower power handling	+
Monacor SPH-315	22 -2	0.235 -0.04	330 +9	4.5 +1	94.5 +0.7	close	100 W vs 150 W: lower power handling	+
Klipsch K24K	24 =	0.323 +0.05	281 -40	4 +0.5	94.3 +0.5	close	80 W vs 150 W: lower power handling	+
Siare 31TE V2	23 -1	0.265 -0.01	387 +66	5 +1.5	95.9 +2.1	close		+
Fostex FW 305	25 +1	0.254 -0.02	254 -67	4.8 +1.3	94.3 +0.5	close	60 W vs 150 W: lower power handling	+
Davis 31TCA12W	27 +3	0.283 +0.01	335 +14	6 +2.5	96.2 +2.4	close		+

Compare the closest 3 against the HD33S66 vp AUDIOREF - 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.