18 Sound 21NTLW5000
Thiele-Small parameters
| Nominal size | 21" |
|---|---|
| Impedance | 8 Ω |
| Fs | 31 Hz |
| Qts | 0.36 |
| Qes | 0.38 |
| Qms | 5.2 |
| Vas | 270 L |
| Sd | 1662 cm² |
| Xmax | 17.5 mm |
| Re | 5.3 Ω |
| Bl | 32 T·m |
| Mms | 372 g |
| Pe | 1800 W |
| Sensitivity | 97 dB |
Alignment hint
| EBP | 82 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 94.5 L |
EBP 50-100: works in either a sealed or ported 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 21SW115 | 33 +2 | 0.36 = | 278 +8 | 14 -3.5 | 97 = | close | 4 Ω vs 8 Ω: amp load changes · Xmax 14 mm < 17.5 mm: lower excursion-limited SPL | + |
| 18 Sound 21NTLW5000 | 30 -1 | 0.32 -0.04 | 300 +30 | 17.5 = | 97 = | close | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 21NLW9001 | 31 = | 0.34 -0.02 | 272 +2 | 14 -3.5 | 95 -2 | close | 4 Ω vs 8 Ω: amp load changes · Xmax 14 mm < 17.5 mm: lower excursion-limited SPL | + |
| B&C 21SW115 | 30 -1 | 0.37 +0.01 | 318 +48 | 14 -3.5 | 97 = | close | Xmax 14 mm < 17.5 mm: lower excursion-limited SPL | + |
| Fane Colossus Prime 21NDXL | 33 +2 | 0.36 = | 241 -29 | 14 -3.5 | 98 +1 | close | Xmax 14 mm < 17.5 mm: lower excursion-limited SPL | + |
| Fane Colossus Prime 21XS | 35 +4 | 0.339 -0.02 | 266 -4 | 14 -3.5 | 97.5 +0.5 | close | Xmax 14 mm < 17.5 mm: lower excursion-limited SPL | + |
| B&C 21SW152 | 32 +1 | 0.36 = | 200 -70 | 15 -2.5 | 96 -1 | close | Xmax 15 mm < 17.5 mm: lower excursion-limited SPL | + |
| Eminence NSW6021-6 | 29 -2 | 0.31 -0.05 | 224.58 -45.42 | 21 +3.5 | 97 = | usable | 6 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 21NLW5300 | 31 = | 0.32 -0.04 | 325 +55 | 15.3 -2.2 | 98.5 +1.5 | usable | Xmax 15.3 mm < 17.5 mm: lower excursion-limited SPL | + |
| 18 Sound 21NLW4100 | 34 +3 | 0.4 +0.04 | 219 -51 | 15.2 -2.3 | 97 = | usable | 4 Ω vs 8 Ω: amp load changes · Xmax 15.2 mm < 17.5 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 21NTLW5000 →
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.