Artech SPM-303
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.243 |
| Qes | 0.27 |
| Qms | 2.4 |
| Vas | 95 L |
| Sd | 496 cm² |
| Xmax | 3.6 mm |
| Re | 7.1 Ω |
| Bl | 22.5 T·m |
| Mms | 102.2 g |
| Pe | 100 W |
| Sensitivity | 92.3 dB |
Alignment hint
| EBP | 111 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 12.7 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 |
|---|---|---|---|---|---|---|---|---|
| BMS 12S330 v2016 | 28.6 -1.4 | 0.24 = | 85.5 -9.5 | 8 +4.4 | 92.3 = | close | + | |
| PHL Audio 4021 v2017 | 30 = | 0.281 +0.04 | 96 +1 | 7 +3.4 | 93 +0.7 | close | + | |
| Raveland BSW 124-II | 28 -2 | 0.252 +0.01 | 91.4 -3.6 | 5.4 +1.8 | 94.7 +2.4 | close | 4 Ω vs 8 Ω: amp load changes | + |
| SICA 12 S 2.5 CS | 33 +3 | 0.265 +0.02 | 93.7 -1.3 | 6 +2.4 | 94 +1.7 | close | + | |
| PHL Audio 4020 | 29 -1 | 0.299 +0.06 | 92 -3 | 7 +3.4 | 92.1 -0.2 | usable | + | |
| Alcone AC 12 SW-8 | 25.7 -4.3 | 0.224 -0.02 | 84.4 -10.6 | 4 +0.4 | 90.9 -1.4 | usable | + | |
| BMS 12S330 | 28.6 -1.4 | 0.24 = | 85.5 -9.5 | 8 +4.4 | 96 +3.7 | usable | + | |
| Mivoc AWM 124 | 30 = | 0.251 +0.01 | 68 -27 | 4.7 +1.1 | 94.6 +2.3 | usable | 4 Ω vs 8 Ω: amp load changes | + |
| Cabasse 30BZ24 | 35 +5 | 0.283 +0.04 | 107 +12 | 3.4 -0.2 | 92.7 +0.4 | usable | 16 Ω vs 8 Ω: amp load changes · Xmax 3.4 mm < 3.6 mm: lower excursion-limited SPL | + |
| SICA 12SR3PL | 27.4 -2.6 | 0.27 +0.03 | 103.1 +8.1 | 7 +3.4 | 94.8 +2.5 | usable | 4 Ω vs 8 Ω: amp load changes | + |
Compare the closest 3 against the SPM-303 →
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.