Siare 31SPCT
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 18 Hz |
| Qts | 0.238 |
| Qes | 0.25 |
| Qms | 5.01 |
| Vas | 407 L |
| Sd | 460.9 cm² |
| Xmax | 4 mm |
| Re | 7.1 Ω |
| Bl | 13.6 T·m |
| Mms | 57.2 g |
| Pe | 120 W |
| Sensitivity | 92.3 dB |
Alignment hint
| EBP | 72 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 52 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 |
|---|---|---|---|---|---|---|---|---|
| JBL 122A | 17 -1 | 0.232 -0.01 | 339.8 -67.2 | 6.9 +2.9 | 91.9 -0.4 | close | + | |
| AER STUDIO BASS | 21 +3 | 0.237 = | 360 -47 | 5.2 +1.2 | 94.3 +2 | close | + | |
| Audiotechnology FLEXUNITS 12 D 77 25 10 KAP | 19 +1 | 0.25 +0.01 | 340 -67 | 8.6 +4.6 | 91.3 -1 | usable | + | |
| Vifa M30W0-49-08 | 21 +3 | 0.225 -0.01 | 400 -7 | 6 +2 | 95.2 +2.9 | usable | + | |
| Audiotechnology 12D772510KAP | 19 +1 | 0.257 +0.02 | 340 -67 | 8.6 +4.6 | 93.1 +0.8 | usable | + | |
| Vega 340 ACTBL | 21 +3 | 0.268 +0.03 | 445 +38 | 4 = | 94.3 +2 | usable | 50 W vs 120 W: lower power handling | + |
| Focal 12V 726 | 19 +1 | 0.267 +0.03 | 340 -67 | 9 +5 | 92 -0.3 | usable | + | |
| Monacor SPH-315 | 22 +4 | 0.235 = | 330 -77 | 4.5 +0.5 | 94.5 +2.2 | usable | + | |
| Klipsch K31 | 19 +1 | 0.185 -0.05 | 386 -21 | 5 +1 | 94.8 +2.5 | usable | + | |
| JBL 128-H | 20 +2 | 0.241 = | 280.3 -126.7 | 7.9 +3.9 | 93 +0.7 | usable | + |
Compare the closest 3 against the 31SPCT →
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.