Audax PR33S66
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.169 |
| Qes | 0.19 |
| Qms | 1.56 |
| Vas | 214.4 L |
| Sd | 530 cm² |
| Xmax | 3.8 mm |
| Re | 5.8 Ω |
| Bl | 17.2 T·m |
| Mms | 51.7 g |
| Pe | 150 W |
| Sensitivity | 98.2 dB |
Alignment hint
| EBP | 158 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 13 L |
EBP > 100: favours a ported (bass-reflex) 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 |
|---|---|---|---|---|---|---|---|---|
| EMS B12 MKII | 30 = | 0.174 = | 227 +12.6 | 4.6 +0.8 | 98.3 +0.1 | close | 100 W vs 150 W: lower power handling | + |
| EMS B12 | 31 +1 | 0.168 = | 227 +12.6 | 4.4 +0.6 | 98.8 +0.6 | close | 100 W vs 150 W: lower power handling | + |
| Fluxmag 1201-LB | 28.9 -1.1 | 0.163 -0.01 | 196.2 -18.2 | 4 +0.2 | 98.4 +0.2 | close | 100 W vs 150 W: lower power handling | + |
| Altec 414-8E | 30.3 +0.3 | 0.195 +0.03 | 224 +9.6 | 4 +0.2 | 97.9 -0.3 | close | + | |
| Altec 414-8C | 30.2 +0.2 | 0.204 +0.03 | 230.2 +15.8 | 4 +0.2 | 97.5 -0.7 | close | + | |
| Audax PR330M0 v2014 | 26 -4 | 0.203 +0.03 | 208 -6.4 | 4 +0.2 | 95.6 -2.6 | usable | + | |
| Altec 414 Z | 32 +2 | 0.219 +0.05 | 263 +48.6 | 4 +0.2 | 96.2 -2 | usable | 16 Ω vs 8 Ω: amp load changes | + |
| Beyma 12XA30/ND | 35 +5 | 0.21 +0.04 | 172 -42.4 | 4 +0.2 | 97.2 -1 | usable | + | |
| Audax PR330M0 + PR33S66 vp | 30 = | 0.172 = | 117 -97.4 | 3.6 -0.2 | 95.5 -2.7 | usable | Xmax 3.6 mm < 3.8 mm: lower excursion-limited SPL | + |
| Monacor SP-330PAX | 33 +3 | 0.238 +0.07 | 190 -24.4 | 4.5 +0.7 | 97.4 -0.8 | usable | + |
Compare the closest 3 against the PR33S66 →
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.