18 Sound 18NTLS5000
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 4 Ω |
| Fs | 37 Hz |
| Qts | 0.33 |
| Qes | 0.35 |
| Qms | 8.4 |
| Vas | 75 L |
| Sd | 1225 cm² |
| Xmax | 17.75 mm |
| Re | 2.7 Ω |
| Bl | 30.7 T·m |
| Mms | 510 g |
| Pe | 1800 W |
| Sensitivity | 89 dB |
Alignment hint
| EBP | 106 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 20.9 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 18NLW9601C | 38 +1 | 0.34 +0.01 | 99 +24 | 14 -3.75 | 95 +6 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 14 mm < 17.75 mm: lower excursion-limited SPL | + |
| 18 Sound 18iD | 40 +3 | 0.26 -0.07 | 67 -8 | 15.5 -2.25 | 95 +6 | usable | 2 Ω vs 4 Ω: amp load changes · Xmax 15.5 mm < 17.75 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLW4500 | 37 = | 0.31 -0.02 | 127 +52 | 14.75 -3 | 96.5 +7.5 | usable | Xmax 14.75 mm < 17.75 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLW9601 | 38 +1 | 0.28 -0.05 | 111 +36 | 14 -3.75 | 96 +7 | usable | Xmax 14 mm < 17.75 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLW4500 | 35 -2 | 0.33 = | 151 +76 | 15.3 -2.45 | 97 +8 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 15.3 mm < 17.75 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLW9601 | 39 +2 | 0.28 -0.05 | 120 +45 | 14 -3.75 | 96 +7 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 14 mm < 17.75 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLS4000 | 27 -10 | 0.35 +0.02 | 168 +93 | 22.3 +4.55 | 88 -1 | risky | 1200 W vs 1800 W: lower power handling | + |
| 18 Sound 18NTLW5000 | 32 -5 | 0.32 -0.01 | 176 +101 | 17.5 -0.25 | 95 +6 | risky | 8 Ω vs 4 Ω: amp load changes · Xmax 17.5 mm < 17.75 mm: lower excursion-limited SPL | + |
| 18 Sound 18NTLW5000 | 32 -5 | 0.3 -0.03 | 165 +90 | 17.5 -0.25 | 95 +6 | risky | Xmax 17.5 mm < 17.75 mm: lower excursion-limited SPL | + |
| B&C 18SW115 | 34 -3 | 0.3 -0.03 | 149.1 +74.1 | 14 -3.75 | 96 +7 | risky | Xmax 14 mm < 17.75 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 18NTLS5000 →
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.