18 Sound 12ND930
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 50 Hz |
| Qts | 0.21 |
| Qes | 0.22 |
| Qms | 5.64 |
| Vas | 70 L |
| Sd | 531 cm² |
| Xmax | 6.5 mm |
| Re | 5.5 Ω |
| Bl | 21.2 T·m |
| Mms | 57 g |
| Pe | 500 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 227 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 6.8 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 |
|---|---|---|---|---|---|---|---|---|
| B&C 12NDL76 | 50 = | 0.2 -0.01 | 73 +3 | 7 +0.5 | 100 +2 | close | + | |
| Beyma 12"P80/Fe V2 | 48 -2 | 0.21 = | 61 -9 | 7.5 +1 | 99 +1 | close | + | |
| B&C 12CL76 | 48 -2 | 0.21 = | 59 -11 | 6 -0.5 | 98.5 +0.5 | close | 350 W vs 500 W: lower power handling · Xmax 6 mm < 6.5 mm: lower excursion-limited SPL | + |
| RCF LF12P903 | 47 -3 | 0.23 +0.02 | 65 -5 | 7 +0.5 | 97.8 -0.2 | close | + | |
| Oberton 12NB450 | 46.46 -3.54 | 0.204 -0.01 | 72.57 +2.57 | 7.75 +1.25 | 100 +2 | close | + | |
| 18 Sound 12ND940 | 49 -1 | 0.2 -0.01 | 64.8 -5.2 | 7.6 +1.1 | 100 +2 | close | + | |
| B&C 12NDL76 | 50 = | 0.19 -0.02 | 70 = | 6 -0.5 | 100 +2 | close | 4 Ω vs 8 Ω: amp load changes · Xmax 6 mm < 6.5 mm: lower excursion-limited SPL | + |
| RCF L 12N301 | 48 -2 | 0.213 = | 70 = | 5 -1.5 | 99.1 +1.1 | close | Xmax 5 mm < 6.5 mm: lower excursion-limited SPL | + |
| Oberton 12B450 | 46.29 -3.71 | 0.235 +0.02 | 71.75 +1.75 | 7.75 +1.25 | 99 +1 | close | + | |
| Oberton 12B401 | 46.63 -3.37 | 0.245 +0.04 | 69.6 -0.4 | 6.75 +0.25 | 97 -1 | close | + |
Compare the closest 3 against the 12ND930 →
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.