18 Sound 21NTLW5000
Thiele-Small parameters
| Nominal size | 21" |
|---|---|
| Impedance | 4 Ω |
| Fs | 30 Hz |
| Qts | 0.32 |
| Qes | 0.33 |
| Qms | 12.3 |
| Vas | 300 L |
| Sd | 1662 cm² |
| Xmax | 17.5 mm |
| Re | 3 Ω |
| Bl | 25 T·m |
| Mms | 372 g |
| Pe | 1800 W |
| Sensitivity | 97 dB |
Alignment hint
| EBP | 91 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 77.3 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 21NLW5300 | 31 +1 | 0.32 = | 325 +25 | 15.3 -2.2 | 98.5 +1.5 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 15.3 mm < 17.5 mm: lower excursion-limited SPL | + |
| 18 Sound 21NTLW5000 | 31 +1 | 0.36 +0.04 | 270 -30 | 17.5 = | 97 = | close | 8 Ω vs 4 Ω: amp load changes | + |
| Beyma 21"LEX1600/Nd | 30 = | 0.29 -0.03 | 305 +5 | 14 -3.5 | 98 +1 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 14 mm < 17.5 mm: lower excursion-limited SPL | + |
| Eminence NSW6021-6 | 29 -1 | 0.31 -0.01 | 224.58 -75.42 | 21 +3.5 | 97 = | close | 6 Ω vs 4 Ω: amp load changes | + |
| 18 Sound 21LW2600 | 27 -3 | 0.33 +0.01 | 333 +33 | 14.6 -2.9 | 97 = | close | 8 Ω vs 4 Ω: amp load changes · Xmax 14.6 mm < 17.5 mm: lower excursion-limited SPL | + |
| B&C 21SW115 | 30 = | 0.37 +0.05 | 318 +18 | 14 -3.5 | 97 = | close | 8 Ω vs 4 Ω: amp load changes · Xmax 14 mm < 17.5 mm: lower excursion-limited SPL | + |
| Faital PRO 21XL3000 | 30 = | 0.25 -0.07 | 284.6 -15.4 | 17.67 +0.17 | 98 +1 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Beyma 21QLEX1600Fe | 30 = | 0.28 -0.04 | 309 +9 | 13 -4.5 | 98 +1 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 13 mm < 17.5 mm: lower excursion-limited SPL | + |
| 18 Sound 21NLW9001 | 31 +1 | 0.34 +0.02 | 272 -28 | 14 -3.5 | 95 -2 | close | Xmax 14 mm < 17.5 mm: lower excursion-limited SPL | + |
| B&C 21SW115 | 33 +3 | 0.36 +0.04 | 278 -22 | 14 -3.5 | 97 = | usable | Xmax 14 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.