BMS 12S320
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 45.4 Hz |
| Qts | 0.2 |
| Qes | 0.21 |
| Qms | 4.2 |
| Vas | 69.5 L |
| Sd | 531 cm² |
| Xmax | 4.5 mm |
| Re | 5.7 Ω |
| Bl | 23.3 T·m |
| Mms | 69 g |
| Pe | 500 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 216 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 6 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 |
|---|---|---|---|---|---|---|---|---|
| PHL Audio 4070 | 47 +1.6 | 0.207 +0.01 | 68 -1.5 | 4.6 +0.1 | 98.7 +0.7 | close | + | |
| Oberton 12NB400 | 43.58 -1.82 | 0.18 -0.02 | 70.45 +0.95 | 5.25 +0.75 | 98 = | close | + | |
| RCF L 12N301 | 48 +2.6 | 0.213 +0.01 | 70 +0.5 | 5 +0.5 | 99.1 +1.1 | close | + | |
| 18 Sound 12ND930 | 50 +4.6 | 0.21 +0.01 | 70 +0.5 | 6.5 +2 | 98 = | close | + | |
| B&C 12 PS 76 | 42 -3.4 | 0.208 +0.01 | 75 +5.5 | 5.1 +0.6 | 97.2 -0.8 | close | + | |
| Beyma 12P80FE V2 | 50 +4.6 | 0.201 = | 66.8 -2.7 | 5.2 +0.7 | 99.9 +1.9 | close | + | |
| 18 Sound 12MB710 | 46 +0.6 | 0.2 = | 81 +11.5 | 5 +0.5 | 100 +2 | close | + | |
| 18 Sound 12MB720 | 46 +0.6 | 0.2 = | 81 +11.5 | 5 +0.5 | 100 +2 | close | + | |
| 18 Sound 12MB810 | 46 +0.6 | 0.2 = | 81 +11.5 | 5 +0.5 | 100 +2 | close | + | |
| Oberton 12NB450 | 46.46 +1.06 | 0.204 = | 72.57 +3.07 | 7.75 +3.25 | 100 +2 | close | + |
Compare the closest 3 against the 12S320 →
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.