18 Sound 12ND940
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 49 Hz |
| Qts | 0.2 |
| Qes | 0.2 |
| Qms | 5.6 |
| Vas | 64.8 L |
| Sd | 531 cm² |
| Xmax | 7.6 mm |
| Re | 5 Ω |
| Bl | 22.2 T·m |
| Mms | 66 g |
| Pe | 600 W |
| Sensitivity | 100 dB |
Alignment hint
| EBP | 245 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 5.6 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 |
|---|---|---|---|---|---|---|---|---|
| B&C 12NDL76 | 50 +1 | 0.2 = | 73 +8.2 | 7 -0.6 | 100 = | close | 400 W vs 600 W: lower power handling · Xmax 7 mm < 7.6 mm: lower excursion-limited SPL | + |
| Oberton 12NB450 | 46.46 -2.54 | 0.204 = | 72.57 +7.77 | 7.75 +0.15 | 100 = | close | + | |
| Beyma 12"P80/Fe V2 | 48 -1 | 0.21 +0.01 | 61 -3.8 | 7.5 -0.1 | 99 -1 | close | Xmax 7.5 mm < 7.6 mm: lower excursion-limited SPL | + |
| Beyma 12P80FE V2 | 50 +1 | 0.201 = | 66.8 +2 | 5.2 -2.4 | 99.9 -0.1 | close | Xmax 5.2 mm < 7.6 mm: lower excursion-limited SPL | + |
| B&C 12NDL76 | 50 +1 | 0.19 -0.01 | 70 +5.2 | 6 -1.6 | 100 = | close | 4 Ω vs 8 Ω: amp load changes · 400 W vs 600 W: lower power handling · Xmax 6 mm < 7.6 mm: lower excursion-limited SPL | + |
| 18 Sound 12ND930 | 50 +1 | 0.21 +0.01 | 70 +5.2 | 6.5 -1.1 | 98 -2 | close | Xmax 6.5 mm < 7.6 mm: lower excursion-limited SPL | + |
| RCF LF12P903 | 47 -2 | 0.23 +0.03 | 65 +0.2 | 7 -0.6 | 97.8 -2.2 | close | Xmax 7 mm < 7.6 mm: lower excursion-limited SPL | + |
| B&C 12CL76 | 48 -1 | 0.21 +0.01 | 59 -5.8 | 6 -1.6 | 98.5 -1.5 | close | 350 W vs 600 W: lower power handling · Xmax 6 mm < 7.6 mm: lower excursion-limited SPL | + |
| Oberton 12B450 | 46.29 -2.71 | 0.235 +0.03 | 71.75 +6.95 | 7.75 +0.15 | 99 -1 | close | 450 W vs 600 W: lower power handling | + |
| RCF MB 12N405 | 52 +3 | 0.203 = | 53 -11.8 | 5.7 -1.9 | 99.5 -0.5 | usable | Xmax 5.7 mm < 7.6 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 12ND940 →
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.