BMS 12CN682
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 46 Hz |
| Qts | 0.258 |
| Qes | 0.27 |
| Qms | 5.8 |
| Vas | 58 L |
| Sd | 487 cm² |
| Xmax | 5.5 mm |
| Re | 5.7 Ω |
| Bl | 20.5 T·m |
| Mms | 68.6 g |
| Pe | 500 W |
| Sensitivity | 96.7 dB |
Alignment hint
| EBP | 170 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 8.9 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 12CN680 | 46 = | 0.26 = | 58 = | 5.5 = | 95 -1.7 | close | 80 W vs 500 W: lower power handling | + |
| PHL Audio 4071-1 | 47 +1 | 0.245 -0.01 | 57.8 -0.2 | 4.7 -0.8 | 97.2 +0.5 | close | Xmax 4.7 mm < 5.5 mm: lower excursion-limited SPL | + |
| LaVoce NBASS12-30 | 46 = | 0.26 = | 68.63 +10.63 | 6.6 +1.1 | 97.5 +0.8 | close | + | |
| B&C 12NDL88 | 48 +2 | 0.24 -0.02 | 57 -1 | 8 +2.5 | 97 +0.3 | close | 4 Ω vs 8 Ω: amp load changes | + |
| B&C 12NDL88-4 | 48 +2 | 0.24 -0.02 | 57 -1 | 8 +2.5 | 95.9 -0.8 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Beyma 12 P1000/Nd | 47 +1 | 0.26 = | 49 -9 | 8 +2.5 | 96 -0.7 | close | + | |
| Oberton 12B401 | 46.63 +0.63 | 0.245 -0.01 | 69.6 +11.6 | 6.75 +1.25 | 97 +0.3 | close | + | |
| Beyma 12MCB700 | 51 +5 | 0.27 +0.01 | 59.5 +1.5 | 7 +1.5 | 98 +1.3 | close | + | |
| RCF LF12X401 | 45 -1 | 0.27 +0.01 | 50 -8 | 9 +3.5 | 96.5 -0.2 | close | + | |
| 18 Sound 12W750 | 55 +9 | 0.27 +0.01 | 58 = | 7 +1.5 | 97 +0.3 | close | 4 Ω vs 8 Ω: amp load changes | + |
Compare the closest 3 against the 12CN682 →
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.