Davis 31ST12M v2011
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 24 Hz |
| Qts | 0.399 |
| Qes | 0.5 |
| Qms | 1.98 |
| Vas | 260 L |
| Sd | 460 cm² |
| Xmax | 8.9 mm |
| Re | 6.3 Ω |
| Bl | 9.8 T·m |
| Mms | 50.2 g |
| Pe | 100 W |
| Sensitivity | 91.6 dB |
Alignment hint
| EBP | 48 · sealed |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 121.5 L |
EBP < 50: favours a sealed (closed) 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 |
|---|---|---|---|---|---|---|---|---|
| Davis 31ST12M | 24 = | 0.399 = | 260 = | 8.9 = | 91.6 = | close | + | |
| Peerless 831857 | 24 = | 0.433 +0.03 | 210 -50 | 9 +0.1 | 91.3 -0.3 | close | + | |
| SB Acoustics SB34NRX75-6 | 19 -5 | 0.397 = | 260 = | 11 +2.1 | 91 -0.6 | close | + | |
| SB Acoustics SB34NRX75-6 vp | 22.2 -1.8 | 0.444 +0.04 | 240 -20 | 11 +2.1 | 92 +0.4 | close | + | |
| Peerless 315SWR | 24 = | 0.433 +0.03 | 210 -50 | 8 -0.9 | 91.3 -0.3 | close | Xmax 8 mm < 8.9 mm: lower excursion-limited SPL | + |
| Audax 180040A | 22.4 -1.6 | 0.392 -0.01 | 239.6 -20.4 | 8 -0.9 | 88.7 -2.9 | close | 16 Ω vs 8 Ω: amp load changes · Xmax 8 mm < 8.9 mm: lower excursion-limited SPL | + |
| Peerless SLS315 | 24.4 +0.4 | 0.452 +0.05 | 205.2 -54.8 | 7.8 -1.1 | 91.4 -0.2 | usable | Xmax 7.8 mm < 8.9 mm: lower excursion-limited SPL | + |
| Aurum Cantus AC300/75C2C | 22 -2 | 0.352 -0.05 | 232 -28 | 8 -0.9 | 90.3 -1.3 | usable | Xmax 8 mm < 8.9 mm: lower excursion-limited SPL | + |
| Davis 31ST12M v2009 | 22 -2 | 0.39 -0.01 | 398 +138 | 9 +0.1 | 91.8 +0.2 | usable | + | |
| JBL 123A | 25 +1 | 0.49 +0.09 | 235 -25 | 7.9 -1 | 93.1 +1.5 | usable | Xmax 7.9 mm < 8.9 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 31ST12M v2011 →
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.