18 Sound 21NLW9001
Thiele-Small parameters
| Nominal size | 21" |
|---|---|
| Impedance | 8 Ω |
| Fs | 32 Hz |
| Qts | 0.31 |
| Qes | 0.34 |
| Qms | 4.5 |
| Vas | 244 L |
| Sd | 1662 cm² |
| Xmax | 14 mm |
| Re | 5.9 Ω |
| Bl | 37 T·m |
| Mms | 390 g |
| Pe | 1800 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 94 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 58.1 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 |
|---|---|---|---|---|---|---|---|---|
| Fane Colossus Prime 21NDXL | 33 +1 | 0.36 +0.05 | 241 -3 | 14 = | 98 = | close | + | |
| Eminence NSW6021-6 | 29 -3 | 0.31 = | 224.58 -19.42 | 21 +7 | 97 -1 | close | 6 Ω vs 8 Ω: amp load changes | + |
| Fane Colossus Prime 21XS | 35 +3 | 0.339 +0.03 | 266 +22 | 14 = | 97.5 -0.5 | close | + | |
| B&C 21SW152 | 32 = | 0.3 -0.01 | 200 -44 | 15 +1 | 96 -2 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Beyma 21"LEX1600/Nd | 30 -2 | 0.29 -0.02 | 305 +61 | 14 = | 98 = | close | + | |
| 18 Sound 21NLW5300 | 31 -1 | 0.32 +0.01 | 325 +81 | 15.3 +1.3 | 98.5 +0.5 | close | + | |
| 18 Sound 21NTLW5000 | 30 -2 | 0.32 +0.01 | 300 +56 | 17.5 +3.5 | 97 -1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| B&C 21SW115 | 33 +1 | 0.36 +0.05 | 278 +34 | 14 = | 97 -1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 21NLW9001 | 31 -1 | 0.34 +0.03 | 272 +28 | 14 = | 95 -3 | close | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 21NTLW5000 | 31 -1 | 0.36 +0.05 | 270 +26 | 17.5 +3.5 | 97 -1 | close | + |
Compare the closest 3 against the 21NLW9001 →
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.